EV Carinae

EV Carinae
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Carina
Right ascension 10h 20m 21.608s[1]
Declination −60° 27′ 15.55″[1]
Apparent magnitude (V) 7.89[2] (7.4-9.0[3])
Characteristics
Evolutionary stage Red supergiant
Spectral type M4Ia[4]
U−B color index +2.34[2]
B−V color index +2.20[2]
Variable type SRC[5][3][6]
Astrometry
Radial velocity (Rv)2.0[7] km/s
Proper motion (μ) RA: −6.1[8] mas/yr
Dec.: 2.4[8] mas/yr
Distance8,200-13,700 ly
(2,500-4,200[2] pc)
Absolute magnitude (MV)−5.24[2]
Details
Radius1,168[4] R☉
Luminosity (bolometric)200,000[4] L☉
Temperature3,574[4] K
Other designations
EV Carinae, HD 89845, CD−59°3024, 2MASS J10202160-6027155, AAVSO 1016-59
Database references
SIMBADdata

EV Carinae is a red supergiant and pulsating variable star of spectral type M4Ia in the constellation Carina. It is a probable member of the Carina OB2 association along the Carina Nebula. It is one of the largest known stars, with a radius over 1,000 times the Sun. If placed at the center of the Solar System, it would extend close to the orbit of Jupiter. EV Car is a semiregular variable star of apparent magnitude 7.4 to 9.0 at the visible band, making it only seen by binoculars or a telescope. Various periods have been identified, but the dominant one is around 347 days.[5]

References

  1. 1 2 Cutri, R. M.; Skrutskie, M. F.; Van Dyk, S.; Beichman, C. A.; Carpenter, J. M.; Chester, T.; Cambresy, L.; Evans, T.; Fowler, J.; Gizis, J.; Howard, E.; Huchra, J.; Jarrett, T.; Kopan, E. L.; Kirkpatrick, J. D.; Light, R. M.; Marsh, K. A.; McCallon, H.; Schneider, S.; Stiening, R.; Sykes, M.; Weinberg, M.; Wheaton, W. A.; Wheelock, S.; Zacarias, N. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". VizieR On-line Data Catalog: II/246. Originally published in: 2003yCat.2246....0C. 2246. Bibcode:2003yCat.2246....0C.
  2. 1 2 3 4 5 Mauron, N.; Josselin, E. (2011). "The mass-loss rates of red supergiants and the de Jager prescription". Astronomy and Astrophysics. 526: A156. arXiv:1010.5369Freely accessible. Bibcode:2011A&A...526A.156M. doi:10.1051/0004-6361/201013993.
  3. 1 2 Kiss, L. L.; Szabó, Gy. M.; Bedding, T. R. (2006). "Variability in red supergiant stars: Pulsations, long secondary periods and convection noise". Monthly Notices of the Royal Astronomical Society. 372 (4): 1721. arXiv:astro-ph/0608438Freely accessible. Bibcode:2006MNRAS.372.1721K. doi:10.1111/j.1365-2966.2006.10973.x.
  4. 1 2 3 4 Van Loon, J. Th.; Cioni, M.-R. L.; Zijlstra, A. A.; Loup, C. (2005). "An empirical formula for the mass-loss rates of dust-enshrouded red supergiants and oxygen-rich Asymptotic Giant Branch stars". Astronomy and Astrophysics. 438: 273. arXiv:astro-ph/0504379Freely accessible. Bibcode:2005A&A...438..273V. doi:10.1051/0004-6361:20042555.
  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. ↑ Percy, John R.; Sato, Hiromitsu (2009). "Long Secondary Periods in Pulsating Red Supergiant Stars". Journal of the Royal Astronomical Society of Canada. 103: 11. Bibcode:2009JRASC.103...11P.
  7. ↑ Feast, M. W.; Woolley, R.; Yilmaz, N. (1972). "The kinematics of semi-regular red variables in the solar neighbourhood". Monthly Notices of the Royal Astronomical Society. 158: 23. Bibcode:1972MNRAS.158...23F. doi:10.1093/mnras/158.1.23.
  8. 1 2 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.

External links

Thesis on SRC stars


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