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 | |
| Proper motion (μ) | RA: −7.26[2] mas/yr Dec.: +0.42[2] mas/yr |
| Parallax (π) | −0.69 ± 0.45[1] mas |
| Distance | 3,850[6] ly |
| Absolute magnitude (MV) | −6.09[2] |
| Details | |
| Radius | 700[2] R☉ |
| Luminosity | 81,000[2] L☉ |
| Surface gravity (log g) | 0.0[2] cgs |
| Temperature | 3,700[2] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
V528 Carinae (V528 Car / HD 95950 / HIP 54021) is a variable star in the constellation Carina.
Distance
Its minimum apparent magnitude is +6.75, it is a distant star that is to an uncertain distance. The measure parallax by the Hipparcos satellite gives a negative value, Its Carinae star cluster membership allows estimate its distance OB2 in 3,850 light-years.[6]
Characteristic
V528 Carinae is a red supergiant of spectral type M2I with an effective temperature of 3,700 K. It has a radius 700 solar radii, making it one of the largest stars. In the visible spectrum luminosity is 11,900 times higher than the Solar bolometric luminosity but-considering all lengths of wave-number reaches 81,000 times the solar luminosity.[2] loses mass in powder form at 0.5 × 10-9 solar masses per year.[6]
Billed as an irregular variable-LC whose prototype is TZ Cassiopeiae, V528 Carinae brightness fluctuates between magnitude +6.51 and +6.75 without periodicity is known alguna.[5]
See also
Reference
- 1 2 3 Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
- 1 2 3 4 5 6 7 8 9 10 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. - ↑ 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.
- 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.
- 1 2 3 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.