NGC 2867

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NGC 2867
Emission nebula
Planetary nebula
NGC 2867.jpg
Hubble Space Telescope (HST) image of NGC 2867
Credit: HST/NASA/ESA
Observation data: J2000 epoch
Right ascension 09h 21m 25.38336s [1]
Declination −58° 18′ 40.6167″ [1]
Distance7,270  ly (2,228  pc) [2]   ly
Apparent magnitude (V)9.7 [3]
Apparent dimensions (V)12″ [4]
43.3″ × 35.6″ [5]
Constellation Carina
Designations ESO 126-8, PN G278.1-05.9, [6] Caldwell 90
See also: Lists of nebulae

NGC 2867 (also known as Caldwell 90) is an elliptical [5] Type II [7] planetary nebula in the southern constellation of Carina, just over a degree to the NNW of the star Iota Carinae. [8] It was discovered by John Herschel on April 1, 1834. Herschel initially thought he might have found a new planet, but on the following night he checked again and discovered it had not moved. [3] The nebula is located at a distance of 7,270 light-years from the Sun. [2]

The central star of the nebula is of spectral type WC3 [9] and is in the process of evolving into a white dwarf, having previously shed the atmosphere that created the surrounding nebula. It is now a hydrogen deficient GW Vir variable that is undergoing non-radial pulsations with an amplitude of less than 0.3 in magnitude. The star has an estimated temperature of 165+18
−20  kK with 5% of the radius of the Sun and is radiating 1,400 times the Sun's luminosity. [5]

The surrounding nebula is fairly typical but does shows carbon enrichment, which suggests the progenitor star was not massive but did pass through third dredge-up. The category of central star has excited a very high degree of ionization in the nebula. [7] The shape of the nebula appears somewhat elongated, which may indicate an interaction with the surrounding interstellar matter. The nebula halo may be a recombination of two separate halos, which could indicate a peculiar mass-loss history. [10]

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<span class="mw-page-title-main">NGC 2438</span> Planetary nebula in the constellation Puppis

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<span class="mw-page-title-main">NGC 6781</span> Planetary nebula in the constellation Aquila

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<span class="mw-page-title-main">NGC 5307</span> Planetary nebula in the constellation Centaurus

NGC 5307 is a planetary nebula in the southern constellation of Centaurus, positioned less than 3° to the northeast of the star Epsilon Centauri. It was discovered by English astronomer John Herschel on April 15, 1836. The nebula is located at a distance of approximately 10.6 kilolight-years from the Sun. The central star, designated PNG 312.3+10.5, is a weak emission-line star, superficially similar to the WC subtype of Wolf–Rayet stars. It has a spectral class of O(H)3.5 V.

<span class="mw-page-title-main">NGC 7662</span> Planetary nebula in the constellation Andromeda

NGC 7662 is a planetary nebula located in the northern constellation Andromeda. It is known as the Blue Snowball Nebula, Snowball Nebula, and Caldwell 22. This nebula was discovered October 6, 1784 by the German-born English astronomer William Herschel. In the New General Catalogue it is described as a "magnificent planetary or annular nebula, very bright, pretty small in angular size, round, blue, variable nucleus". The object has an apparent visual magnitude of 8.3 and spans an angular size of 32″ × 28″. Parallax measurements give a distance estimate of 5,730 ± 340 ly (1,757 ± 103 pc).

<span class="mw-page-title-main">NGC 7354</span> Planetary nebula in the constellation Cepheus

NGC 7354 is a planetary nebula located in the northern circumpolar constellation of Cepheus, at a distance of approximately 5.5 kly from the Sun. It was discovered by German-born astronomer William Herschel on November 3, 1787. John L. E. Dreyer described it as, "a planetary nebula, bright, small, round, pretty gradually a very little brighter middle".

<span class="mw-page-title-main">NGC 3195</span> Planetary nebula in the constellation Chamaeleon

NGC 3195 is a planetary nebula located in the southern constellation of Chamaeleon. Discovered by Sir John Herschel in 1835, this 11.6 apparent magnitude planetary nebula is slightly oval in shape, with dimensions of 40×35 arc seconds, and can be seen visually in telescopic apertures of 10.5 centimetres (4.1 in) at low magnifications.

<span class="mw-page-title-main">NGC 6884</span> Planetary nebula in the constellation of Cygnus

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<span class="mw-page-title-main">NGC 3242</span> Planetary nebula in the constellation Hydra

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<span class="mw-page-title-main">IC 1295</span> Planetary nebula in the constellation Scutum

IC 1295 is a planetary nebula in the constellation Scutum. It was discovered in 1867 by Truman Safford. It lies roughly 4,700 light-years away.

<span class="mw-page-title-main">NGC 1501</span> Planetary nebula in the constellation Camelopardalis

NGC 1501 is a complex planetary nebula located in the constellation of Camelopardalis, it was discovered on 27 August 1787 by William Herschel.

<span class="mw-page-title-main">NGC 6905</span> Planetary nebula in the constellation Delphinus

NGC 6905, also known as the Blue Flash Nebula, is a planetary nebula in the constellation Delphinus. It was discovered by William Herschel in 1784. The central star is 14.0 mag. The distance of the nebula, as with most planetary nebulae, is not well determined and estimates range between 1.7 and 2.6 kpc.

<span class="mw-page-title-main">NGC 6778</span> Planetary nebula in the constellation Aquila

NGC 6778 is a planetary nebula (PN) located about 10,300 light years away from the Sun in the equatorial constellation of Aquila. It is positioned 5° to the SSW of the prominent star Delta Aquilae. This nebula was discovered by German astronomer Albert Marth during the period 1863–1865. English astronomer John Herschel may have mistakenly catalogued it as NGC 6785, as nothing can be found now at the coordinates he gave for it. In the New General Catalogue it was described as a "small, elongated, ill-defined disc".

References

  1. 1 2 Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics . 616. A1. arXiv: 1804.09365 . Bibcode: 2018A&A...616A...1G . doi: 10.1051/0004-6361/201833051 . Gaia DR2 record for this source at VizieR.
  2. 1 2 Stanghellini, Letizia; et al. (December 10, 2008). "The Magellanic Cloud Calibration of the Galactic Planetary Nebula Distance Scale". The Astrophysical Journal. 689 (1): 194–202. arXiv: 0807.1129 . Bibcode:2008ApJ...689..194S. doi:10.1086/592395. S2CID   119257242.
  3. 1 2 O'Meara, Stephen James (2016). Deep-Sky Companions: The Caldwell Objects. Cambridge University Press. p. 415. ISBN   9781107083974.
  4. ↑ "SEDS Online NGC Catalogue". Results for NGC 2867. Retrieved 2010-12-07.
  5. 1 2 3 Keller, Graziela R.; et al. (August 2014). "UV spectral analysis of very hot H-deficient [WCE]-type central stars of planetary nebulae: NGC 2867, NGC 5189, NGC 6905, Pb 6 and Sand 3". Monthly Notices of the Royal Astronomical Society. 442 (2): 1379–1395. arXiv: 1405.6763 . Bibcode:2014MNRAS.442.1379K. doi: 10.1093/mnras/stu878 .
  6. ↑ "NGC 2867". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2020-09-11.
  7. 1 2 Peña, M.; Stasińska, G. (July 2001). Aguilar, A.; Carramiñana, A. (eds.). Planetary Nebulae with [WR] nuclei. IX Latin American Regional IAU Meeting, "Focal Points in Latin American Astronomy", held in Tonantzintla, Mexico, Nov 9-13, 1998. Revista Mexicana de Astronomía y Astrofísica, Serie de Conferencias. p. 61. Bibcode:2001RMxAC..11...61P.
  8. ↑ Sinnott, Roger W.; Perryman, Michael A. C. (1997). Millennium Star Atlas. Vol. 2. Sky Publishing Corporation and the European Space Agency. p. 994. ISBN   0-933346-83-2.
  9. ↑ Werner, K.; et al. (June 1992). "A spectacular mass-loss event of the central star of Longmore 4". Astronomy and Astrophysics. 259: L69–L72. Bibcode:1992A&A...259L..69W.
  10. ↑ Corradi, R. L. M. (2003). Kwok, Sun; Dopita, Michael; Sutherland, Ralph (eds.). Observations of Planetary Nebulae Haloes. Planetary Nebulae: Their Evolution and Role in the Universe, Proceedings of the 209th Symposium of the International Astronomical Union held at Canberra, Australia, 19-23 November, 2001. Astronomical Society of the Pacific. p. 447. Bibcode:2003IAUS..209..447C.
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