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
Distance 1,977[6] pc
Absolute magnitude (MV) −5.85 (variable)[7]
Details
Mass 17.7[8] M
Radius 1,050[6] R
Luminosity 138,000[6] L
Surface gravity (log g) −0.3[6] cgs
Temperature 3,432[6] K
Other designations
V602 Carinae, V602 Car, HD 97671, CD−59°3623, IRAS 11113-5949, 2MASS J11132996-6005288
Database references
SIMBAD data

V602 Carinae (V602 Car, HD 97671) is a variable star with a radius around 1,000 times the radius of the Sun. The red supergiant is in the constellation Carina and has a spectral class of M3. It is shining with over 100,000 times the luminosity of the Sun and is losing mass at the rate of 1.9 × 10−6 times the mass of the Sun 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 and a possible periods of 635 and 678 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. ^ 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, Bibcode:2011A&A...526A.156M, arXiv:1010.5369Freely accessible, doi:10.1051/0004-6361/201013993. 
  3. ^ a b c 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 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. Bibcode:2015A&A...575A..50A. arXiv:1501.01560Freely accessible. doi:10.1051/0004-6361/201425212. 
  7. ^ 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. Bibcode:2005ApJ...628..973L. arXiv:astro-ph/0504337Freely accessible. doi:10.1086/430901. 
  8. ^ Fadeyev, Yu. A. (2012). "Nonlinear pulsations of red supergiants". Astronomy Letters. 38 (4): 260–270. Bibcode:2012AstL...38..260F. arXiv:1112.2365Freely accessible. 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. ^ 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.