V528 Carinae

Last updated
V528 Carinae
Observation data
Epoch J2000       Equinox J2000
Constellation Carina
Right ascension 11h 03m 06.15s [1]
Declination −60° 54′ 38.6″ [1]
Apparent magnitude  (V)6.27 - 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  mas [1]
Distance 7,200 ± 500  ly
(2,200 ± 100  pc)
Absolute magnitude  (MV)−6.09 [5]
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
V528  Car, CD−60°3327, HD  95950, HIP  54021, 2MASS  J11030616−6054387, IRAS  11010−6038, WISE  J110305.99−605438.7, SAO  251235
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]

A light curve for V528 Carinae, plotted from Hipparcos data V528CarLightCurve.png
A light curve for V528 Carinae, plotted from Hipparcos data

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. 1 2 3 4 5 6 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940 . S2CID   244398875. Gaia DR3 record for this source at VizieR.
  2. ↑ "V528 Car". International Variable Star Index. AAVSO . Retrieved 2022-11-25.
  3. ↑ 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 .
  4. ↑ 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 .
  5. 1 2 3 4 5 6 7 8 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.
  6. 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.
  7. ↑ 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.
  8. ↑ 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.
  9. ↑ 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.
  10. ↑ "/ftp/cats/more/HIP/cdroms/cats". Centre de Données astronomiques de Strasbourg. Strasbourg astronomical Data Center. Retrieved 15 October 2022.
  11. ↑ 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.
  12. ↑ 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.
  13. ↑ 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" (PDF). Information Bulletin on Variable Stars. 4659: 1–27. Bibcode:1999IBVS.4659....1K . Retrieved 11 January 2025.
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.