Vela (constellation)

Last updated
Vela
Constellation
Vela IAU.svg
List of stars in Vela
AbbreviationVel
Genitive Velorum
Pronunciation /ˈviːlə/ ,
genitive /vɪˈloʊrəm/
Symbolismthe Sails
Right ascension 9h
Declination −50°
QuadrantSQ2
Area 500 sq. deg. (32nd)
Main stars 5
Bayer/Flamsteed
stars		50
Stars with planets 7
Stars brighter than 3.00m5
Stars within 10.00 pc (32.62 ly)3
Brightest star γ Vel  (1.75 m )
Messier objects 0
Meteor showers Delta Velids
Gamma Velids
Puppid-velids
Bordering
constellations		 Antlia
Pyxis
Puppis
Carina
Centaurus
Visible at latitudes between +30° and −90°.
Best visible at 21:00 (9 p.m.) during the month of March.

Vela is a constellation in the southern sky, which contains the Vela Supercluster. Its name is Latin for the sails of a ship, and it was originally part of a larger constellation, the ship Argo Navis , which was later divided into three parts, the others being Carina and Puppis. With an apparent magnitude of 1.8, its brightest star is the hot blue multiple star Gamma Velorum, one component of which is the closest and brightest Wolf-Rayet star in the sky. Delta and Kappa Velorum, together with Epsilon and Iota Carinae, form the asterism known as the False Cross. 1.95-magnitude Delta is actually a triple or quintuple star system.

Contents

History

Argo Navis was one of the 48 classical constellations listed by the 2nd-century astronomer Ptolemy, and represented the ship Argo , used by Jason and the Argonauts on their quest for the Golden Fleece in Greek mythology. German cartographer Johann Bayer depicted the constellation on his Uranometria of 1603, and gave the stars Bayer designations from Alpha to Omega. However, his chart was inaccurate as the constellation was not fully visible from the Northern Hemisphere. [1]

Argo was more accurately charted and subdivided in 1752 by the French astronomer Nicolas Louis de Lacaille, forming Carina (the keel), Vela (the sails), and Puppis (the poop deck). Despite the division, Lacaille kept Argo's Bayer designations. Therefore, Carina has the Alpha, Beta and Epsilon originally assigned to Argo Navis, while Vela's brightest stars are Gamma and Delta, Puppis has Zeta as its brightest star, and so on. [1]

Characteristics

The constellation of Vela, the sails, as it can be seen by the naked eye Constellation Vela.jpg
The constellation of Vela, the sails, as it can be seen by the naked eye

Vela is bordered by Antlia and Pyxis to the north, Puppis to the northwest, Carina to the south and southwest, and Centaurus to the east. Covering 500 square degrees, it ranks 32nd of the 88 modern constellations in size. The three-letter abbreviation for the constellation, as adopted by the International Astronomical Union in 1922, is "Vel". [2]

The official constellation boundaries, as set by Eugène Delporte in 1930, are defined by a polygon of 14 segments. In the equatorial coordinate system, the right ascension coordinates of these borders lie between 08h 13.3m and 11h 05.5m, while the declination coordinates are between −37.16° and −57.17°. [3]

Features

Stars

The brightest star in the constellation, Gamma Velorum, is a complex multiple star system. The brighter component, known as Gamma2 Velorum, shines as a blue-white star of apparent magnitude 1.83. [4] It is a spectroscopic binary made up of two very hot blue stars orbiting each other every 78.5 days and separated by somewhere between 0.8 and 1.6 Astronomical Units (AU). The brighter component is a hot blue main-sequence star of spectral type O7.5 and is around 280,000 times as luminous, is around 30 times as massive and is 17 times the diameter of the Sun with a surface temperature of 35,000 K. The second component is an extremely rare example of hot star known as a Wolf–Rayet star, and is the closest and brightest example in the sky. It has a surface temperature of 57,000 and is around 170,000 times as luminous as the Sun, though it radiates most of its energy in the ultraviolet spectrum. [5] Gamma1 is a blue-white star of spectral type B2III and apparent magnitude 4.3. [6] The two pairs are separated by 41 arcseconds, easily separable in binoculars. [6] Parallax measurements give a distance of 1,116 light-years, [7] meaning that they are at least 12,000 AU apart. Further afield are 7.3-magnitude Gamma Velorum C and 9.4-magnitude Gamma Velorum D, lying 62 and 93 arcseconds south-southeast from Gamma2.

Dusty ring around double star IRAS 08544-4431. The dusty ring around the aging double star IRAS 08544-4431.jpg
Dusty ring around double star IRAS 08544-4431.

The next brightest star is Delta Velorum or Alsephina, [9] also a multiple star system and one of the brightest eclipsing binaries in the sky. Together with Kappa Velorum or Markeb, [9] Iota Carinae or Aspidiske [9] and Epsilon Carinae or Avior, [9] it forms the diamond-shaped asterism known as the False Cross—so called because it is sometimes mistaken for the Southern Cross, causing errors in astronavigation. [10] Appearing as a white star of magnitude 1.95, [11] Delta is actually a triple or possibly quintuple star system located around 80 light-years from the Solar System. Delta A has a magnitude of 1.99 and is an eclipsing binary composed of two A-type white stars (Delta Aa and Ab) which orbit each other every 45.2 days and lie 0.5 AU from each other, with a resulting drop in magnitude of 0.4 when the dimmer one passes.in front of the brighter. Delta B is a 5.1 magnitude yellow G-class star of similar dimensions to the Sun which ranges between 26 and 72 AU away from the brighter pair, taking 142 years to complete a revolution. Further out still, at a distance of 1700 AU, are two red dwarfs of magnitudes 11 and 13. If they are part of the multiple system, they take 28000 years to complete an orbit. [12] Also called Markeb, Kappa appears as a blue-white star of spectral type B2IV-V and magnitude 2.47 but is in fact a spectroscopic binary. [13] The two orbit around each other with a period of 116.65 days, [14] but the size, mass and nature of the companion are as yet unclear. [15]

The orange-hued Lambda Velorum, or Suhail, [9] is the third-brightest star in the constellation. A supergiant of spectral type K4Ib-II, it varies between magnitudes 2.14 and 2.3, [16] and lies 545 light-years distant. [17] It has around 11,000 times the luminosity, 9 to 12 times the mass and 207 times the diameter of the Sun. [18]

AH Velorum is a Cepheid variable located less than a degree to the northeast of Gamma. [19] A yellow-white supergiant of spectral type F7Ib-II, it pulsates between magnitudes 5.5 and 5.89 over 4.2 days. [20] Also lying close to Gamma, [21] V Velorum is a Cepheid of spectral type F6-F9II ranging from magnitude 7.2 to 7.9 over 4.4 days. [22] AI Velorum is located 2.8 degrees north-northeast of Gamma, [19] a Delta Scuti variable of spectral type A2p-F2pIV/V that ranges between magnitudes 6.15 and 6.76 in around 2.7 hours. [23]

V390 Velorum is an aged star that has been found to be surrounded by a dusty disk. An RV Tauri variable, it has a spectral type of F3e and ranges between magnitudes 9.01 and 9.27 over nearly 95 days. [24]

Omicron Velorum is a blue-white subgiant of spectral type B3III-IV located around 495 light-years from the Solar System. A slowly pulsating B star, it ranges between magnitudes 3.57 and 3.63 over 2.8 days. [25] It is the brightest star in, and gives its name to, the Omicron Velorum Cluster, also known as IC 2391, an open cluster located around 500 light-years away.

Seven star systems have been found to have planets. HD 75289 is a Sun-like star of spectral type G0V with a hot Jupiter planetary companion that takes only about 3.51 days to revolve at an orbital distance of 0.0482 AU. WASP-19 is a star of apparent magnitude 12.3 located 815 light-years away, which has a hot Jupiter-like planet that orbits every 0.7 days. HD 73526 is a Sun-like star of spectral type G6V that has two planets around double the mass of Jupiter each with orbits of 187 and 377 days, respectively.

HD 85390 is an orange dwarf of spectral type K1.5V lying around 111 light-years distant with a planet 42 times as massive as Earth orbiting every 788 days.

HD 93385 is a Sun-like star of spectral type G2/G3V located around 138 light-years away that is orbited by two super-Earths with periods of 13 and 46 days and masses 8.3 and 10.1 times that of Earth, respectively.

Brown dwarfs

The discovery of a binary brown dwarf system named Luhman 16 only 6.6 light-years away, the third-closest system to the Solar System, was announced on 11 March 2013.

Deep-sky objects

Of the deep-sky objects of interest in Vela is a planetary nebula known as NGC 3132, nicknamed the 'Eight-Burst Nebula' or 'Southern Ring Nebula' (see accompanying photo). It lies on the border of the constellation with Antlia. [19] NGC 2899 is an unusual red-hued example. This constellation has 32 more planetary nebulae.

Deep-sky photograph of NGC 3132, also known as the Eight-Burst or Southern Ring Nebula. (c) NASA. NGC 3132.jpg
Deep-sky photograph of NGC 3132, also known as the Eight-Burst or Southern Ring Nebula. © NASA.

The Gum Nebula is a faint emission nebula, believed to be the remains of a million-year-old supernova. Within it lies the smaller and younger Vela Supernova Remnant. This is the nebula of a supernova explosion that is believed to have been visible from Earth around 10,000 years ago. The remnant contains the Vela Pulsar, the first pulsar to be identified optically. Nearby is NGC 2736, also known as the Pencil Nebula.

HH-47 is a Herbig-Haro Object, a young star around 1,400 light-years from the Sun that is ejecting material at tremendous speed (up to a million kilometres per hour) into its surrounds. This material glows as it hits surrounding gas. [26]

NGC 2670 is an open cluster located in Vela. It has an overall magnitude of 7.8 and is 3,200 light-years from Earth. The stars of NGC 2670, a Trumpler class II 2 p and Shapley class-d cluster, are in a conformation suggesting a bow and arrow. Its class indicates that it is a poor, loose cluster, though detached from the star field. It is somewhat concentrated at its center, and its less than 50 stars range moderately in brightness. [27]

Located 2 degrees south of Gamma Velorum, NGC 2547 is an open cluster containing around 50 stars of magnitudes 7 to 15. [19]

NGC 3201 is a globular cluster discovered by James Dunlop on May 28, 1826. Its stellar population is inhomogeneous, varying with distance from the core. The effective temperature of the stars shows an increase with greater distance, with the redder and cooler stars tending to be located closer to the core. As of 2010, is one of only two clusters (including Messier 4) that shows a definite inhomogeneous population. [28]

RCW 36 is a star-forming region in Vela, and one of the nearest sites of massive star formation. This star-forming region has given rise to a cluster of several hundred young stars that power an HII region. [29] The star-forming region lies in Clump 6 in the Vela Molecular Ridge Cloud C. [30]

Related Research Articles

<span class="mw-page-title-main">Antlia</span> Constellation in the Southern Celestial Hemisphere

Antlia is a constellation in the Southern Celestial Hemisphere. Its name means "pump" in Latin and Greek; it represents an air pump. Originally Antlia Pneumatica, the constellation was established by Nicolas-Louis de Lacaille in the 18th century. Its non-specific (single-word) name, already in limited use, was preferred by John Herschel then welcomed by the astronomic community which officially accepted this. North of stars forming some of the sails of the ship Argo Navis, Antlia is completely visible from latitudes south of 49 degrees north.

<span class="mw-page-title-main">Carina (constellation)</span> Constellation in the southern celestial hemisphere

Carina is a constellation in the southern sky. Its name is Latin for the keel of a ship, and it was the southern foundation of the larger constellation of Argo Navis until it was divided into three pieces, the other two being Puppis, and Vela.

<span class="mw-page-title-main">Canis Major</span> Constellation in the southern celestial hemisphere

Canis Major is a constellation in the southern celestial hemisphere. In the second century, it was included in Ptolemy's 48 constellations, and is counted among the 88 modern constellations. Its name is Latin for "greater dog" in contrast to Canis Minor, the "lesser dog"; both figures are commonly represented as following the constellation of Orion the hunter through the sky. The Milky Way passes through Canis Major and several open clusters lie within its borders, most notably M41.

<span class="mw-page-title-main">Canis Minor</span> Constellation in the northern celestial hemisphere

Canis Minor is a small constellation in the northern celestial hemisphere. In the second century, it was included as an asterism, or pattern, of two stars in Ptolemy's 48 constellations, and it is counted among the 88 modern constellations. Its name is Latin for "lesser dog", in contrast to Canis Major, the "greater dog"; both figures are commonly represented as following the constellation of Orion the hunter.

<span class="mw-page-title-main">Cygnus (constellation)</span> Constellation in the northern celestial hemisphere

Cygnus is a northern constellation on the plane of the Milky Way, deriving its name from the Latinized Greek word for swan. Cygnus is one of the most recognizable constellations of the northern summer and autumn, and it features a prominent asterism known as the Northern Cross. Cygnus was among the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations.

<span class="mw-page-title-main">Grus (constellation)</span> Constellation in the southern celestial hemisphere

Grus is a constellation in the southern sky. Its name is Latin for the crane, a type of bird. It is one of twelve constellations conceived by Petrus Plancius from the observations of Pieter Dirkszoon Keyser and Frederick de Houtman. Grus first appeared on a 35-centimetre-diameter (14-inch) celestial globe published in 1598 in Amsterdam by Plancius and Jodocus Hondius and was depicted in Johann Bayer's star atlas Uranometria of 1603. French explorer and astronomer Nicolas-Louis de Lacaille gave Bayer designations to its stars in 1756, some of which had been previously considered part of the neighbouring constellation Piscis Austrinus. The constellations Grus, Pavo, Phoenix and Tucana are collectively known as the "Southern Birds".

<span class="mw-page-title-main">Pyxis</span> Constellation in the southern celestial hemisphere

Pyxis is a small and faint constellation in the southern sky. Abbreviated from Pyxis Nautica, its name is Latin for a mariner's compass. Pyxis was introduced by Nicolas-Louis de Lacaille in the 18th century, and is counted among the 88 modern constellations.

<span class="mw-page-title-main">Puppis</span> Constellation in the southern celestial hemisphere

Puppis is a constellation in the southern sky. It was originally part of the traditional constellation of Argo Navis, which was divided into three parts, the other two being Carina, and Vela. Puppis is the largest of the three constellations in square degrees. It is one of the 88 modern constellations recognized by the International Astronomical Union.

<span class="mw-page-title-main">Tucana</span> Constellation in the southern celestial hemisphere

Tucana is a constellation in the southern sky, named after the toucan, a South American bird. It is one of twelve constellations conceived in the late sixteenth century by Petrus Plancius from the observations of Pieter Dirkszoon Keyser and Frederick de Houtman. Tucana first appeared on a 35-centimetre-diameter (14 in) celestial globe published in 1598 in Amsterdam by Plancius and Jodocus Hondius and was depicted in Johann Bayer's star atlas Uranometria of 1603. French explorer and astronomer Nicolas Louis de Lacaille gave its stars Bayer designations in 1756. The constellations Tucana, Grus, Phoenix and Pavo are collectively known as the "Southern Birds".

<span class="mw-page-title-main">Triangulum Australe</span> Constellation in the southern celestial hemisphere

Triangulum Australe is a small constellation in the far Southern Celestial Hemisphere. Its name is Latin for "the southern triangle", which distinguishes it from Triangulum in the northern sky and is derived from the acute, almost equilateral pattern of its three brightest stars. It was first depicted on a celestial globe as Triangulus Antarcticus by Petrus Plancius in 1589, and later with more accuracy and its current name by Johann Bayer in his 1603 Uranometria. The French explorer and astronomer Nicolas Louis de Lacaille charted and gave the brighter stars their Bayer designations in 1756.

<span class="mw-page-title-main">Phoenix (constellation)</span> Minor constellation in the southern sky

Phoenix is a minor constellation in the southern sky. Named after the mythical phoenix, it was first depicted on a celestial atlas by Johann Bayer in his 1603 Uranometria. The French explorer and astronomer Nicolas Louis de Lacaille charted the brighter stars and gave their Bayer designations in 1756. The constellation stretches from roughly −39° to −57° declination, and from 23.5h to 2.5h of right ascension. The constellations Phoenix, Grus, Pavo and Tucana, are known as the Southern Birds.

<span class="mw-page-title-main">Norma (constellation)</span> Constellation in the southern celestial hemisphere

Norma is a small constellation in the Southern Celestial Hemisphere between Ara and Lupus, one of twelve drawn up in the 18th century by French astronomer Nicolas-Louis de Lacaille and one of several depicting scientific instruments. Its name is Latin for normal, referring to a right angle, and is variously considered to represent a rule, a carpenter's square, a set square or a level. It remains one of the 88 modern constellations.

<span class="mw-page-title-main">Perseus (constellation)</span> Constellation in the northern celestial hemisphere

Perseus is a constellation in the northern sky, named after the Greek mythological hero Perseus. It is one of the 48 ancient constellations listed by the 2nd-century astronomer Ptolemy, and among the 88 modern constellations defined by the International Astronomical Union (IAU). It is located near several other constellations named after ancient Greek legends surrounding Perseus, including Andromeda to the west and Cassiopeia to the north. Perseus is also bordered by Aries and Taurus to the south, Auriga to the east, Camelopardalis to the north, and Triangulum to the west. Some star atlases during the early 19th century also depicted Perseus holding the disembodied head of Medusa, whose asterism was named together as Perseus et Caput Medusae; however, this never came into popular usage.

<span class="mw-page-title-main">Circinus</span> Constellation in the southern celestial hemisphere

Circinus is a small, faint constellation in the southern sky, first defined in 1756 by the French astronomer Nicolas-Louis de Lacaille. Its name is Latin for compass, referring to the drafting tool used for drawing circles. Its brightest star is Alpha Circini, with an apparent magnitude of 3.19. Slightly variable, it is the brightest rapidly oscillating Ap star in the night sky. AX Circini is a Cepheid variable visible with the unaided eye, and BX Circini is a faint star thought to have been formed from the merger of two white dwarfs. Two sun-like stars have planetary systems: HD 134060 has two small planets, and HD 129445 has a Jupiter-like planet. Supernova SN 185 appeared in Circinus in 185 AD and was recorded by Chinese observers. Two novae have been observed more recently, in the 20th century.

<span class="mw-page-title-main">Musca</span> Constellation in the southern celestial hemisphere

Musca is a small constellation in the deep southern sky. It was one of 12 constellations created by Petrus Plancius from the observations of Pieter Dirkszoon Keyser and Frederick de Houtman, and it first appeared on a celestial globe 35 cm (14 in) in diameter published in 1597 in Amsterdam by Plancius and Jodocus Hondius. The first depiction of this constellation in a celestial atlas was in Johann Bayer's Uranometria of 1603. It was also known as Apis for 200 years. Musca remains below the horizon for most Northern Hemisphere observers.

<span class="mw-page-title-main">Corvus (constellation)</span> Constellation in the Southern Celestial Hemisphere

Corvus is a small constellation in the Southern Celestial Hemisphere. Its name means "crow" in Latin. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it depicts a raven, a bird associated with stories about the god Apollo, perched on the back of Hydra the water snake. The four brightest stars, Gamma, Delta, Epsilon, and Beta Corvi, form a distinctive quadrilateral or cross-shape in the night sky.

<span class="mw-page-title-main">Pavo (constellation)</span> Constellation in the southern celestial hemisphere

Pavo is a constellation in the southern sky whose name is Latin for 'peacock'. Pavo first appeared on a 35-cm (14 in) diameter celestial globe published in 1598 in Amsterdam by Petrus Plancius and Jodocus Hondius and was depicted in Johann Bayer's star atlas Uranometria of 1603, and was likely conceived by Plancius from the observations of Pieter Dirkszoon Keyser and Frederick de Houtman. French explorer and astronomer Nicolas-Louis de Lacaille gave its stars Bayer designations in 1756. The constellations Pavo, Grus, Phoenix and Tucana are collectively known as the "Southern Birds".

<span class="mw-page-title-main">Gamma Velorum</span> Star system in the constellation Vela

Gamma Velorum is a quadruple star system in the constellation Vela. This name is the Bayer designation for the star, which is Latinised from γ Velorum and abbreviated γ Vel. At a combined magnitude of +1.72, it is one of the brightest stars in the night sky, and contains by far the closest and brightest Wolf–Rayet star. It has the traditional name Suhail al Muhlif and the modern name Regor, but neither is approved by the International Astronomical Union, making it the brightest star by apparent magnitude without an IAU approved name.

k Puppis Star in the constellation Puppis

k Puppis is a Bayer designation given to an optical double star in the constellation Puppis, the two components being k1 Puppis and k2 Puppis.

<span class="mw-page-title-main">Omicron Puppis</span> Variable Star in the constellation Puppis

Omicron Puppis (ο Puppis) is candidate binary star system in the southern constellation of Puppis. It is visible to the naked eye, having a combined apparent visual magnitude of +4.48. Based upon an annual parallax shift of 2.30 mas as seen from Earth, it is located roughly 1,400 light years from the Sun.

References

  1. 1 2 Wagman, Morton (2003). Lost Stars: Lost, Missing and Troublesome Stars from the Catalogues of Johannes Bayer, Nicholas Louis de Lacaille, John Flamsteed, and Sundry Others. Blacksburg, VA: The McDonald & Woodward Publishing Company. pp. 83, 315–19. ISBN   978-0-939923-78-6.
  2. ↑ Russell, Henry Norris (1922). "The New International Symbols for the Constellations". Popular Astronomy. 30: 469. Bibcode:1922PA.....30..469R.
  3. ↑ "Vela, constellation boundary". The Constellations. International Astronomical Union. Retrieved 6 October 2013.
  4. ↑ Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237: 0. Bibcode:2002yCat.2237....0D.
  5. ↑ North, J. R.; Tuthill, P. G.; Tango, W. J.; Davis, J. (2007). "Γ2 Velorum: Orbital solution and fundamental parameter determination with SUSI". Monthly Notices of the Royal Astronomical Society. 377 (1): 415–424. arXiv: astro-ph/0702375 . Bibcode:2007MNRAS.377..415N. doi: 10.1111/j.1365-2966.2007.11608.x . S2CID   16425744.
  6. 1 2 Jeffries, R. D.; Naylor, T.; Walter, F. M.; Pozzo, M. P.; Devey, C. R. (2009). "The stellar association around Gamma Velorum and its relationship with Vela OB2". Monthly Notices of the Royal Astronomical Society. 393 (2): 538. arXiv: 0810.5320 . Bibcode:2009MNRAS.393..538J. doi: 10.1111/j.1365-2966.2008.14162.x . S2CID   17560818.
  7. ↑ van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv: 0708.1752 , Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID   18759600
  8. ↑ "Sharpest View Ever of Dusty Disc Around Aging Star" . Retrieved 23 March 2016.
  9. 1 2 3 4 5 "Naming Stars". IAU.org. Retrieved 8 August 2018.
  10. ↑ Moore, Patrick (2010). Patrick Moore's Astronomy: Teach Yourself. Hachette. ISBN   978-1-4441-2977-9.
  11. ↑ "V* Delta Velorum -- Eclipsing binary of Algol type (detached)". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 11 October 2013.
  12. ↑ Kaler, Jim. "Delta Velorum". Stars. University of Illinois. Retrieved 11 October 2013.
  13. ↑ "Kappa Velorum - Spectroscopic binary". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 10 October 2013.
  14. ↑ Pourbaix, D.; et al. (September 2004), "SB9: The ninth catalogue of spectroscopic binary orbits", Astronomy and Astrophysics, 424 (2): 727–732, arXiv: astro-ph/0406573 , Bibcode:2004A&A...424..727P, doi:10.1051/0004-6361:20041213, S2CID   119387088
  15. ↑ Kaler, Jim. "Markeb". Stars. University of Illinois. Retrieved 11 October 2013.
  16. ↑ "Lambda Velorum". International Variable Star Index. American Association of Variable Star Observers. 25 September 2009. Retrieved 11 October 2013.
  17. ↑ "V* Lambda Velorum -- Pulsating Variable Star". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 10 October 2013.
  18. ↑ Kaler, Jim. "Suhail". Stars. University of Illinois. Retrieved 10 October 2013.
  19. 1 2 3 4 Motz, Lloyd; Nathanson, Carol (1991). The Constellations: An Enthusiast's Guide to the Night Sky. London, United Kingdom: Aurum Press. pp. 381–83. ISBN   978-1-85410-088-7.
  20. ↑ "AH Velorum". International Variable Star Index. American Association of Variable Star Observers. 4 January 2010. Retrieved 11 October 2013.
  21. ↑ Moore, Patrick (2010). Exploring the Night Sky with Binoculars. Cambridge, United Kingdom: Cambridge University Press. p. 144. ISBN   978-0-521-79390-2.
  22. ↑ "V Velorum". International Variable Star Index. American Association of Variable Star Observers. 4 January 2010. Retrieved 11 October 2013.
  23. ↑ "AI Velorum". International Variable Star Index. American Association of Variable Star Observers. 11 September 2011. Retrieved 10 August 2022.
  24. ↑ "V0390 Velorum". International Variable Star Index. American Association of Variable Star Observers. 25 May 2011. Retrieved 11 October 2013.
  25. ↑ "Omicron Velorum". International Variable Star Index. American Association of Variable Star Observers. 10 February 2012. Retrieved 11 October 2013.
  26. ↑ Foncea, Valeria; Arce; Héctor (20 August 2013). "ALMA Takes Close Look at Drama of Starbirth". Atacama Large Millimeter/Submillimeter Array. Archived from the original on 27 September 2013. Retrieved 11 October 2013.
  27. ↑ Levy 2005, p. 87.
  28. ↑ Kravtsov, V.; et al. (March 2010), "Evidence of the inhomogeneity of the stellar population in the differentially reddened globular cluster NGC 3201", Astronomy and Astrophysics, 512: L6, arXiv: 1004.5583 , Bibcode:2010A&A...512L...6K, doi:10.1051/0004-6361/200913749, S2CID   118407774.
  29. ↑ Feigelson; et al. (2013). "Overview of the Massive Young Star-Forming Complex Study in Infrared and X-Ray (MYStIX) Project". The Astrophysical Journal Supplement Series. 209 (2): 26. arXiv: 1309.4483 . Bibcode:2013ApJS..209...26F. doi:10.1088/0067-0049/209/2/26. S2CID   56189137.
  30. ↑ Yamaguchi; et al. (1999). "A Study of Dense Molecular Gas and Star Formation toward the Vela Molecular Ridge with NANTEN". Publications of the Astronomical Society of Japan. 51 (6): 775–790. Bibcode:1999PASJ...51..775Y. doi: 10.1093/pasj/51.6.775 .
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.