Langbahn Team – Weltmeisterschaft

HD 125288

This article is about v Centauri. Not to be confused with ν (nu) Centauri. For the variable star, see V Centauri.
HD 125288
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Centaurus
Right ascension 14h 20m 19.54267s[1]
Declination −56° 23′ 11.3838″[1]
Apparent magnitude (V) 4.30[2]
Characteristics
Evolutionary stage Supergiant[3]
Spectral type B5Ib/II[4] or B6Ib[5]
B−V color index 0.082±0.003[2]
Astrometry
Radial velocity (Rv)4.2±2.7[2] km/s
Proper motion (μ) RA: −9.437 mas/yr[1]
Dec.: −7.543 mas/yr[1]
Parallax (π)2.2511 ± 0.1972 mas[1]
Distance1,270±130 ly
(390±40 pc)[6]
Absolute magnitude (MV)−3.56[2]
Details[6]
Mass9.3±0.3 M☉
Radius21±2 R☉
Luminosity12,600+3,200
−2,600 L☉
Surface gravity (log g)2.77±0.05 cgs
Temperature13,700±300 K
Rotational velocity (v sin i)23±4 km/s
Age28.84+3.52
−3.14 Myr
Other designations
v Cen, CPD−55°5984, FK5 529, GC 19318, HD 125288, HIP 70069, HR 5358, SAO 241641[7]
Database references
SIMBADdata

HD 125288 is a single[8] star in the southern constellation of Centaurus. It has the Bayer designation v Centauri (lower case V); while HD 125288 is the star's identifier in the Henry Draper catalogue. The object has a blue-white hue and is faintly visible to the naked eye with an apparent visual magnitude of 4.30.[2] Based on spectroscopic measurements, it is located at a distance of approximately 1,270 light years from Earth.[6] This is a candidate runaway star that is moving to the west and falling back into the Galactic plane.[5] It has an absolute magnitude of −3.56.[2]

This massive B-type supergiant star[3] has a stellar classification of B5Ib/II[4] or B6Ib.[5] It is around 29 million years old and has 9 times the mass of the Sun. The star has expanded to 21 times the girth of the Sun and is spinning with a projected rotational velocity of 23 km/s. It is radiating 12,600 times the luminosity of the Sun from its photosphere at an effective temperature of 13,700 K.[6]

In 2016, an asterism including HD 125288 (SAO 241641) was unofficially identified in honor of David Bowie.[9][10]

References

  1. ^ a b c d 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. ^ a b c d e f Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 119257644.
  3. ^ a b Fraser, M.; et al. (2010). "Atmospheric parameters and rotational velocities for a sample of Galactic B-type supergiants". Monthly Notices of the Royal Astronomical Society. 404 (3): 1306. arXiv:1001.3337. Bibcode:2010MNRAS.404.1306F. doi:10.1111/j.1365-2966.2010.16392.x. S2CID 118674151.
  4. ^ a b Houk, Nancy; Cowley, A. P. (1979). Michigan catalogue of two-dimensional spectral types for the HD stars. Vol. 1. Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan. Bibcode:1978mcts.book.....H.
  5. ^ a b c Maíz Apellániz, J.; et al. (August 2018). "Search for Galactic runaway stars using Gaia Data Release 1 and HIPPARCOS proper motions". Astronomy & Astrophysics. 616: 20. arXiv:1804.06915. Bibcode:2018A&A...616A.149M. doi:10.1051/0004-6361/201832787. S2CID 55004808. A149.
  6. ^ a b c d Weßmayer, D.; Przybilla, N.; Butler, K. (2022-12-01), "Quantitative spectroscopy of B-type supergiants", Astronomy & Astrophysics, 668: A92, arXiv:2208.02692, Bibcode:2022A&A...668A..92W, doi:10.1051/0004-6361/202243973, ISSN 0004-6361
  7. ^ "HD 125288". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-02-03.
  8. ^ Eggleton, P. P.; Tokovinin, A. A. (September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. S2CID 14878976.
  9. ^ "David Bowie Honored With Lightning Bolt-Shaped Constellation". The Huffington Post. 18 January 2016. Retrieved 2016-01-18.
  10. ^ "Constellation Bowie? I don't think so". Guy's weblog. 2016-01-18. Retrieved 2016-01-18.
Quelle: https://en.wikipedia.org/wiki/HD_125288