V533 Carinae

Last updated
V533 Carinae
Carina constellation map.svg
Red circle.svg
Location of V533 Carinae (circled)
Observation data
Epoch J2000        Equinox J2000
Constellation Carina
Right ascension 11h 12m 36.01358s [1]
Declination −60° 19′ 03.4516″ [1]
Apparent magnitude  (V)4.59 [2]
Characteristics
Evolutionary stage Blue supergiant
Spectral type A5Iae: [3]
U−B color index +0.08 [4]
B−V color index +0.52 [4]
Variable type α Cyg [5]
Astrometry
Radial velocity (Rv)−8.40 [6]  km/s
Proper motion (μ)RA: −5.68 [1]   mas/yr
Dec.: 2.15 [1]   mas/yr
Parallax (π)1.18 ± 0.83  mas [7]
Distance 12,700  ly
(3,900 [8]   pc)
Absolute magnitude  (MV)−7.9 [9]
Details
Mass 17 [10]   M☉
Radius 141.5 [10]   R☉
Luminosity 96,000 [10]   L☉
Temperature 8,330 [10]   K
Rotational velocity (v sin i)34 [10]  km/s
Other designations
V533  Carinae, y  Carinae, HR  4352, HD  97534, CD−59°3611, HIP  54751, SAO  251316, GC  15415, CCDM  J11126-6019
Database references
SIMBAD data

V533 Carinae (V533 Car, y Car, y Carinae) is a A-type supergiant and a Alpha Cygni variable star with a mean apparent magnitude of +4.59 in the constellation Carina. It is located at a distance of about 13,000 light years. [8]

Contents

Location

NGC 3572 plus nebulosity. V533 Car is the brightest star in the frame, on the right (south is up). The star cluster NGC 3572 and its dramatic surroundings.jpg
NGC 3572 plus nebulosity. V533 Car is the brightest star in the frame, on the right (south is up).

V533 Carinae is found near the Carina Nebula on the edge of the constellation Carina towards Crux. It is a member of Collinder 240, [9] a sparse open cluster sometimes considered to be a portion of the richer nearby cluster NGC 3572. Together with the small clusters Hogg 10 and 11, they are all part of the Carina OB2 stellar association. [11]

V533 Carinae is the brightest star in the region. The other bright stars in NGC 3572 are hot young stars such as HD 97166 and all the clusters in the region are only a few million years old. [12]

V533 Carinae is classified as a double star with the companion being a magnitude 11.5 star 21.7 arc-seconds away. [13]

Variability

A light curve for V533 Carinae, plotted from Hipparcos data V533CarLightCurve.png
A light curve for V533 Carinae, plotted from Hipparcos data

V533 Carinae was one of many small amplitude variable stars detected from an analysis of Hipparcos photometry. It was granted its variable star designation in 1999 as a batch of 2,675 new variables. [15] It is classified as an Alpha Cygni type variable and its brightness varies from magnitude +4.69 to +4.75 as measured on the Hipparcos photometric scale. [5] A period of 1.58499 days and an average visual amplitude of 0.0146 magnitudes are quoted although the variations are not strictly regular. [2]

Properties

The Carina Nebula is at the very right edge of the frame (north is up) and V533 Car is the brightest star shown, near the open cluster NGC 3572. Wide-field view of the sky around the star cluster NGC 3572.jpg
The Carina Nebula is at the very right edge of the frame (north is up) and V533 Car is the brightest star shown, near the open cluster NGC 3572.

V533 Carinae is a bright supergiant with a luminosity around 100,000 times that of the sun. The temperature is over 8,000 K and the radius around 140 R☉. Its equatorial rotation is more than 15 times faster than the sun's.

Prior to 1971, it was always classified with an early or mid F-type spectral type, but since then has always been given a mid or late A class. [4] [16]

Related Research Articles

<span class="mw-page-title-main">V399 Carinae</span> Star in the constellation Carina

V399 Carinae is a variable star in the constellation Carina.

<span class="mw-page-title-main">V382 Carinae</span> Star in the constellation Carina

V382 Carinae, also known as x Carinae, is a yellow hypergiant in the constellation Carina. It is a G-type star with a mean apparent magnitude of +3.93, and a variable star of low amplitude.

<span class="mw-page-title-main">HD 96919</span> Variable star in the constellation Carina

HD 96919, also known by its Bayer designation of z2 Carinae and the variable star designation of V371 Carinae, is a blue supergiant star in the constellation Carina. It lies near the Carina Nebula and at a comparable distance.

<span class="mw-page-title-main">DL Crucis</span> Star in the constellation Crux

DL Crucis is a variable star in the constellation Crux.

<span class="mw-page-title-main">Mu Normae</span> Star in the constellation Norma

μ Normae, Latinised as Mu Normae, is a blue supergiant star of spectral type O9.7 Iab, located in the constellation of Norma.

<span class="mw-page-title-main">RT Carinae</span> Star in the constellation Carina

RT Carinae, also known as CD-58 3538, is a variable star in the Carina Nebula in the constellation Carina. It has a mean apparent magnitude of +8.55.

<span class="mw-page-title-main">V424 Lacertae</span> Star in the constellation Lacerta

V424 Lacertae is a red supergiant variable star in the constellation Lacerta. It is a member of the Lacerta OB1 stellar association.

<span class="mw-page-title-main">WR 24</span> Wolf-Rayet star in the constellation Carina

WR 24 is a Wolf-Rayet star in the constellation Carina. It is one of the most luminous stars known. At the edge of naked eye visibility it is also one of the brightest Wolf Rayet stars in the sky.

<span class="mw-page-title-main">KQ Puppis</span> Binary star in the constellation Puppis

KQ Puppis is a spectroscopic binary variable star in the constellation Puppis. A red supergiant star and a hot main sequence star orbit each other every 9,742 days. Its apparent magnitude varies between 4.82 and 5.17.

<span class="mw-page-title-main">V1073 Scorpii</span> Variable star in the constellation Scorpius

V1073 Scorpii is a variable star in the constellation Scorpius. It has a non-Greek Bayer designation of k Scorpii. The star has a blue-white hue and is visible to the naked eye with an apparent visual magnitude that fluctuates around +4.87. Parallax measurements yield a distance estimate of approximately 2,920 ly (896 pc) from the Sun, and it is drifting further away with a radial velocity of +7 km/s. It has an absolute magnitude of −6.8

<span class="mw-page-title-main">10 Persei</span> Blue-supergiant star in the constellation Perseus

10 Persei is a blue supergiant star in the constellation Perseus. Its apparent magnitude is 6.26 although it is slightly variable.

<span class="mw-page-title-main">3 Geminorum</span> Star in the constellation Gemini

3 Geminorum is a blue supergiant star in the constellation Gemini. It is a small amplitude pulsating variable and a close double star, with a mean combined apparent visual magnitude of about 5.7.

<span class="mw-page-title-main">V520 Persei</span> Star in the constellation Perseus

V520 Persei is a blue supergiant member of NGC 869, one of the Perseus Double Cluster open clusters. It is an irregular variable star. At a magnitude of 6.55, V520 Persei is the brightest member in either NGC 869 or NGC 884, although the brighter HD 13994 lies in the foreground along the same line of sight.

<span class="mw-page-title-main">HR 4887</span> Star in the constellation Crux

HR 4887 is a suspected variable star in the open cluster NGC 4755, which is also known as the Kappa Crucis Cluster or Jewel Box Cluster.

<span class="mw-page-title-main">DS Crucis</span> Star in the constellation Crux

DS Crucis is a variable star near the open cluster NGC 4755, which is also known as the Kappa Crucis Cluster or Jewel Box Cluster. It is in the constellation Crux.

<span class="mw-page-title-main">BU Crucis</span> Star in the constellation Crux

BU Crucis is a variable star in the open cluster NGC 4755, which is also known as the Kappa Crucis Cluster or Jewel Box Cluster.

<span class="mw-page-title-main">V528 Carinae</span> Star in the constellation Carina

V528 Carinae is a variable star in the constellation Carina.

<span class="mw-page-title-main">BO Carinae</span> Star in the constellation Carina

BO Carinae, also known as HD 93420, is an irregular variable star in the constellation Carina.

<span class="mw-page-title-main">DU Crucis</span> Star in the constellation Crux

DU Crucis is a red supergiant and slow irregular variable star in the open cluster NGC 4755, which is also known as the Kappa (κ) Crucis Cluster or Jewel Box Cluster.

<span class="mw-page-title-main">Collinder 228</span>

Collinder 228 is an open cluster within the southern part of the Carina Nebula NGC 3372, about 25' south of η Carinae. It is probably composed of stars which recently formed from the material in the nebula. QZ Carinae is the brightest member of Collinder 228 with an apparent magnitude between 6.16 and 6.49.

References

  1. 1 2 3 4 Van Leeuwen, F. (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.
  2. 1 2 Koen, Chris; Eyer, Laurent (2002). "New periodic variables from the Hipparcos epoch photometry". Monthly Notices of the Royal Astronomical Society. 331 (1): 45–59. arXiv: astro-ph/0112194 . Bibcode:2002MNRAS.331...45K. doi:10.1046/j.1365-8711.2002.05150.x. S2CID   10505995.
  3. ↑ Gray, R. O.; Garrison, R. F. (1989). "The late A-type stars - Refined MK classification, confrontation with Stromgren photometry, and the effects of rotation". Astrophysical Journal Supplement Series. 70: 623. Bibcode:1989ApJS...70..623G. doi: 10.1086/191349 .
  4. 1 2 3 Malaroda, Stella (1973). "Classification of Some Bright F-Type Stars with Unusual Spectra". Publications of the Astronomical Society of the Pacific. 85 (505): 328. Bibcode:1973PASP...85..328M. doi:10.1086/129463.
  5. 1 2 Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
  6. ↑ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv: 1606.08053 . Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID   119231169.
  7. ↑ Gaia Collaboration (2016). "VizieR Online Data Catalog: Gaia DR1 (Gaia Collaboration, 2016)". VizieR On-line Data Catalog: I/337. Originally Published in: Astron. Astrophys. 1337. Bibcode:2016yCat.1337....0G.
  8. 1 2 Lorenzo, J.; Negueruela, I.; Castro, N.; Norton, A. J.; Vilardell, F.; Herrero, A. (2014). "Astrophysical parameters of the peculiar X-ray transient IGR J11215−5952". Astronomy & Astrophysics. 562: A18. arXiv: 1312.5597 . Bibcode:2014A&A...562A..18L. doi:10.1051/0004-6361/201321913. S2CID   119232680.
  9. 1 2 Arellano Ferro, A.; Parrao, L. (1990). "Colour excesses and absolute magnitudes for non-Cepheid F-G supergiants from uvbybeta photometry". Astronomy and Astrophysics. 239: 205. Bibcode:1990A&A...239..205A.
  10. 1 2 3 4 5 Snow, Theodore P.; Lamers, Henny J. G. L. M.; Lindholm, Douglas M.; Odell, Andrew P. (1994). "An atlas of ultraviolet P Cygni profiles". The Astrophysical Journal Supplement Series. 95: 163. Bibcode:1994ApJS...95..163S. doi: 10.1086/192099 .
  11. ↑ Clariá, J. J. (1976). "Relation of NGC 3590, Hogg 10, and Collinder 240 to the structure of the Carina spiral feature". Astronomical Journal. 81: 155. Bibcode:1976AJ.....81..155C. doi:10.1086/111870.
  12. ↑ Messina, S. (2007). "The RACE-OC project: Rotation and ACtivity Evolution in Open Clusters". Memorie della Società Astronomica Italiana. 78: 628. Bibcode:2007MmSAI..78..628M.
  13. ↑ Dommanget, J.; Nys, O. (1994). "Catalogue of the Components of Double and Multiple stars (CCDM). First edition". Obs. R. Belg. 115. Bibcode:1994CoORB.115.....D.
  14. ↑ "Hipparcos Tools Interactive Data Access". Hipparcos. ESA. Retrieved 8 December 2021.
  15. ↑ Kazarovets, E. V.; Samus, N. N.; Durlevich, O. V.; Frolov, M. S.; Antipin, S. V.; Kireeva, N. N.; Pastukhova, E. N. (1999). "The 74th Special Name-list of Variable Stars". Information Bulletin on Variable Stars. 4659: 1. Bibcode:1999IBVS.4659....1K.
  16. ↑ Skiff, B. A. (2014). "VizieR Online Data Catalog: Catalogue of Stellar Spectral Classifications (Skiff, 2009-2016)". VizieR On-line Data Catalog: B/Mk. Originally Published in: Lowell Observatory (October 2014). 1. Bibcode:2014yCat....1.2023S.
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.