Astronomy:V528 Carinae
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Carina |
| Right ascension | 11h 03m 06.15s[1] |
| Declination | −60° 54′ 38.6″[1] |
| Apparent magnitude (V) | 6.27 - 6.78[2] |
| Characteristics | |
| Spectral type | M2 Ib:[3][4] |
| B−V color index | +2.04[5] |
| Variable type | Lc[6] |
| Astrometry | |
| Radial velocity (Rv) | −27.80[7] km/s |
| Proper motion (μ) | RA: −7.639[1] mas/yr Dec.: +2.109[1] mas/yr |
| Parallax (π) | 0.4504 ± 0.0293[1] mas |
| Distance | 7,200 ± 500 ly (2,200 ± 100 pc) |
| Details | |
| Radius | 700[5] R☉ |
| Luminosity | 81,000[5] L☉ |
| Surface gravity (log g) | 0.0[5] cgs |
| Temperature | 3,700[5] 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 that varies between about 6.3 and 6.8. When it is near its maximum brightness, it is very faintly visible to the naked eye under ideal observing conditions. It is a distant star but the exact distance is uncertain. The Hipparcos satellite gives a negative annual parallax and is not helpful,[8] while the Gaia Data Release 3 parallax of 0.45 mas implies a distance of around 7,200 light years (2,200 parsecs).[1] Assuming membership of the Carina OB2 membership would give a distance of about 1,830 parsecs.[9]
V528 Carinae is a red supergiant of spectral type M2 Ib with an effective temperature of 3,700 K. It has a radius of 700 solar radii.[5] In the visible spectrum, its luminosity is 11,900 times higher than the Sun,[11] but the bolometric luminosity considering all wavelengths reaches around 81,000 L☉.[5] It loses mass at 0.5×10−9 M☉ per year.[12]
It was found to be a variable star when the Hipparcos data was analyzed, and for that reason it was given its variable star designation in 1999.[13] It is classified as a slow irregular variable whose prototype is TZ Cassiopeiae.[6]
See also
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ "V528 Car". AAVSO. https://www.aavso.org/vsx/index.php?view=detail.top&oid=6281.
- ↑ Humphreys, Roberta M.; Strecker, Donald W.; Ney, E. P. (1972). "Spectroscopic and Photometric Observations of M Supergiants in Carina". Astrophysical Journal 172: 75. doi:10.1086/151329. Bibcode: 1972ApJ...172...75H.
- ↑ 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. doi:10.1093/mnras/286.2.500. Bibcode: 1997MNRAS.286..500M.
- ↑ 5.0 5.1 5.2 5.3 5.4 5.5 5.6 Cite error: Invalid
<ref>tag; no text was provided for refs namedrg - ↑ 6.0 6.1 Samus, N. N. 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. doi:10.1134/S1063773706110065. Bibcode: 2006AstL...32..759G.
- ↑ Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V.
- ↑ 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. doi:10.1007/s10509-020-03827-0. Bibcode: 2020Ap&SS.365..112M.
- ↑ "/ftp/cats/more/HIP/cdroms/cats". Strasbourg astronomical Data Center. https://cdsarc.cds.unistra.fr/viz-bin/ftp-index?/ftp/cats/more/HIP/cdroms/cats.
- ↑ 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. doi:10.3847/1538-3881/ab1cbd. Bibcode: 2019AJ....158...20M.
- ↑ 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.
- ↑ Kazarovets, E. V.; Samus, N. N.; Durlevich, O. V.; Frolov, M. S.; Antipin, S. V.; Kireeva, N. N.; Pastukhova, E. N. (January 1999). "The 74th Special Name-list of Variable Stars". Information Bulletin on Variable Stars 4659: 1-27. Bibcode: 1999IBVS.4659....1K. https://ibvs.konkoly.hu/pub/ibvs/4601/4659.pdf. Retrieved 11 January 2025.
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