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V602 Carinae

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This is an old revision of this page, as edited by Lithopsian (talk | contribs) at 13:19, 18 June 2018 (refs say 635 or 672 (who says 678?), nothing about in between, make refs more closely inline). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

V602 Carinae

Location of V602 Car
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Carina
Right ascension 11h 13m 29.9740s[1]
Declination −60° 05′ 28.838″[1]
Apparent magnitude (V) 8.39[2] (7.6 - 9.1[3])
Characteristics
Spectral type M3 Ia-Iab[4]
U−B color index +2.59[2]
B−V color index +2.52[2]
Variable type SRc[3]
Astrometry
Proper motion (μ) RA: −7.4[5] mas/yr
Dec.: 0.2[5] mas/yr
Distance1,977[6] pc
Absolute magnitude (MV)−5.85 (variable)[7]
Details
Mass17.7[8] M☉
Radius1,050 ± 165[6] R☉
Luminosity138,000[6] L☉
Surface gravity (log g)−0.3[6] cgs
Temperature3,432 ± 280[6] K
Other designations
V602 Carinae, V602 Car, HD 97671, CD−59°3623, IRAS 11113-5949, 2MASS J11132996-6005288
Database references
SIMBADdata

V602 Carinae (V602 Car, HD 97671) is a red supergiant and variable star of spectral type of M3 in the constellation Carina. It is one of largest known stars.

V602 Car was calculated to have a bolometric luminosity below 110,000 L☉ and a radius around 860 R☉ based on an effective temperature of 3,550 K.[7] A more recent study derive a slightly highter bolometric luminosity of 140,000 L☉ based on the measured flux and an assumed distance, and a larger radius of 1,050 ± 165 R☉ based on the measured angular diameter and luminosity. The effective temperature was then calculated from the luminosity and radius.[6]

V602 Car has an estimated mass loss rate of 1.9×10−6 M☉ per year.[2] An excess of emission at long wavelengths from this star, as well as a small amount of silicate emission, suggests that it may be enclosed by an extensive cloud of dust.[9]

V602 Car is a semiregular variable star with a maximum brightness range of magnitude 7.6 - 9.1[10] and a period of 635[10] or 672[3] days. Despite the large amplitude of variation, it was only named as a variable star in 2006.[3][10]

See also

References

  1. ^ a b Hog, E.; Kuzmin, A.; Bastian, U.; Fabricius, C.; Kuimov, K.; Lindegren, L.; Makarov, V. V.; Roeser, S. (1998). "The TYCHO Reference Catalogue". Astronomy and Astrophysics. 335: L65. Bibcode:1998A&A...335L..65H.
  2. ^ a b c d Mauron, N.; Josselin, E. (February 2011), "The mass-loss rates of red supergiants and the de Jager prescription", Astronomy and Astrophysics, 526: A156, arXiv:1010.5369, Bibcode:2011A&A...526A.156M, doi:10.1051/0004-6361/201013993.
  3. ^ a b c d 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.
  4. ^ Keenan, Philip C.; McNeil, Raymond C. (1989). "The Perkins catalog of revised MK types for the cooler stars". Astrophysical Journal Supplement Series. 71: 245. Bibcode:1989ApJS...71..245K. doi:10.1086/191373.
  5. ^ a b Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27. Bibcode:2000A&A...355L..27H. doi:10.1888/0333750888/2862.
  6. ^ a b c d e f Arroyo-Torres, B.; Wittkowski, M.; Chiavassa, A.; Scholz, M.; Freytag, B.; Marcaide, J. M.; Hauschildt, P. H.; Wood, P. R.; Abellan, F. J. (2015). "What causes the large extensions of red supergiant atmospheres?. Comparisons of interferometric observations with 1D hydrostatic, 3D convection, and 1D pulsating model atmospheres". Astronomy & Astrophysics. 575: A50. arXiv:1501.01560. Bibcode:2015A&A...575A..50A. doi:10.1051/0004-6361/201425212.
  7. ^ a b Levesque, Emily M.; Massey, Philip; Olsen, K. A. G.; Plez, Bertrand; Josselin, Eric; Maeder, Andre; Meynet, Georges (2005). "The Effective Temperature Scale of Galactic Red Supergiants: Cool, but Not as Cool as We Thought". The Astrophysical Journal. 628 (2): 973–985. arXiv:astro-ph/0504337. Bibcode:2005ApJ...628..973L. doi:10.1086/430901.
  8. ^ Fadeyev, Yu. A. (2012). "Nonlinear pulsations of red supergiants". Astronomy Letters. 38 (4): 260–270. arXiv:1112.2365. Bibcode:2012AstL...38..260F. doi:10.1134/S1063773712040032.
  9. ^ Humphreys, Roberta M.; Strecker, Donald W.; Ney, E. P. (February 1972), "Spectroscopic and Photometric Observations of M Supergiants in Carina", Astrophysical Journal, 172: 75, Bibcode:1972ApJ...172...75H, doi:10.1086/151329.
  10. ^ a b c Kazarovets, E. V.; Samus, N. N.; Durlevich, O. V.; Kireeva, N. N.; Pastukhova, E. N. (2006). "The 78th Name-List of Variable Stars". Information Bulletin on Variable Stars. 5721: 1. Bibcode:2006IBVS.5721....1K.
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