V528 Carinae
![]() Location of V528 Car | |
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Carina |
Right ascension | 11h 03m 06.15s[1] |
Declination | 60° 54′ 38.6″[1] |
Apparent magnitude (V) | +6.75[2] |
Characteristics | |
Spectral type | M2 Ib:[3][4] |
B−V color index | +2.04[2] |
Variable type | Lc[5] |
Astrometry | |
Radial velocity (Rv) | −27.80[6] km/s |
Proper motion (μ) | RA: –7.639[7] mas/yr Dec.: +2.109[7] mas/yr |
Parallax (π) | 0.4504 ± 0.0293[7] mas |
Distance | 7,200 ± 500 ly (2,200 ± 100 pc) |
Absolute magnitude (MV) | −6.09[2] |
Details | |
Radius | 415[8] R☉ |
Luminosity | 26,000 - 28,000[8] L☉ |
Surface gravity (log g) | 0.0[2] cgs |
Temperature | 3,660±170[8] K |
Other designations | |
Database references | |
SIMBAD | data |
V528 Carinae (V528 Car, HD 95950, HIP 54021) is a variable star in the constellation Carina.
V528 Carinae has an apparent visual magnitude of +6.75. It is a distant star but the exact distance is uncertain. The Hipparcos satellite gives a negative annual parallax and is not helpful, while the Gaia Data Release 2 parallax of 0.7027 mas implies a distance around 4,600 light years.[9] Assuming membership of the Carina OB2 membership would give a distance of about 1,830 parsecs.[10]
V528 Carinae is a red supergiant of spectral type M2 Ib with an effective temperature of 3,660 K. It has a radius of 415 solar radii. In the visible spectrum luminosity is 11,900 times higher than the sun, but the bolometric luminosity considering all wavelengths reaches around 30,000 L☉.[8] It loses mass at 0.5×10−9 M☉ per year.[11]
It is classified as a slow irregular variable whose prototype is TZ Cassiopeiae.[5]
References[]
- ^ a b Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600.
- ^ a b c d Levesque, Emily M.; Massey, Philip; Olsen, K. A. G.; Plez, Bertrand; Josselin, Eric; Maeder, Andre; Meynet, Georges (August 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. S2CID 15109583.
- ^ Humphreys, Roberta M.; Strecker, Donald W.; Ney, E. P. (1972). "Spectroscopic and Photometric Observations of M Supergiants in Carina". Astrophysical Journal. 172: 75. Bibcode:1972ApJ...172...75H. doi:10.1086/151329.
- ^ Malyuto, V.; Oestreicher, M. O.; Schmidt-Kaler, Th. (1997). "Quantitative spectral classification of galactic disc K-M stars from spectrophotometric measurements". Monthly Notices of the Royal Astronomical Society. 286 (2): 500. Bibcode:1997MNRAS.286..500M. doi:10.1093/mnras/286.2.500.
- ^ a b 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.
- ^ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.
- ^ a b c Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. Gaia EDR3 record for this source at VizieR.
- ^ a b c d Messineo, M.; Brown, A. G. A. (2019). "A Catalog of Known Galactic K-M Stars of Class I Candidate Red Supergiants in Gaia DR2". The Astronomical Journal. 158 (1): 20. arXiv:1905.03744. Bibcode:2019AJ....158...20M. doi:10.3847/1538-3881/ab1cbd. S2CID 148571616.
- ^ 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.
- ^ Melnik, A. M.; Dambis, A. K. (2020). "Distance scale for high-luminosity stars in OB associations and in field with Gaia DR2. Spurious systematic motions". Astrophysics and Space Science. 365 (7): 112. arXiv:2006.14649. Bibcode:2020Ap&SS.365..112M. doi:10.1007/s10509-020-03827-0. S2CID 220128144.
- ^ Josselin, E.; Blommaert, J. A. D. L.; Groenewegen, M. A. T.; Omont, A.; Li, F. L. (2000). "Observational investigation of mass loss of M supergiants". Astronomy and Astrophysics. 357: 225. Bibcode:2000A&A...357..225J.
- Carina (constellation)
- Slow irregular variables
- Objects with variable star designations
- M-type supergiants
- Durchmusterung objects
- Henry Draper Catalogue objects
- Hipparcos objects
- 2MASS objects
- IRAS catalogue objects