V602 Carinae

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V602 Carinae
Carina constellation map.svg
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
Diameter1,050 ± 165[6] D
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 D based on the assumption of 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 D 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[edit]

References[edit]

  1. 1.0 1.1 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. 2.0 2.1 2.2 2.3 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. 3.0 3.1 3.2 3.3 Samus, N. N.Expression error: Unrecognized word "etal". (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. 5.0 5.1 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P. et al. (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. 6.0 6.1 6.2 6.3 6.4 6.5 Arroyo-Torres, B.; Wittkowski, M.; Chiavassa, A.; Scholz, M.; Freytag, B.; Marcaide, J. M.; Hauschildt, P. H.; Wood, P. R. et al. (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. 7.0 7.1 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. 10.0 10.1 10.2 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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