V Puppis

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V Puppis
Puppis constellation map.svg
Red circle.svg

Location of V Puppis (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Puppis
Right ascension 07h 58m 14.43920s[1]
Declination −49° 14′ 41.6803″[1]
Apparent magnitude (V) 4.41[2]
Spectral type B1Vp+B3IV:[3]
U−B color index -0.96[2]
B−V color index -0.17[2]
Variable type β Lyr[4]
Radial velocity (Rv) +19.40[5] km/s
Proper motion (μ) RA: -5.34[1] mas/yr
Dec.: +7.12[1] mas/yr
Parallax (π) 3.40 ± 0.29[1] mas
Distance 960 ± 80 ly
(290 ± 30 pc)
Absolute magnitude (MV) -3.56[6]
Mass 8.3[7] M
Luminosity 6430[8] L
Temperature 19,400[8] K
Rotational velocity (v sin i) 275.0[9] km/s
Other designations
CD-48°3349, CCDM J07582-4915A, GC 10802, GSC 08143-03239, HIP 38957, HR 3129, HD 65818, SAO 219226, WDS J07582-4915A
Database references

V Puppis (V Pup) is a star system in the constellation Puppis. Its apparent magnitude is 4.41.[2] There is a binary star system at the center with a B1 dwarf orbiting a B3 subgiant star.[3] They have an orbital period of 1.45 days and a distance of only 15 solar radii apart. However, the system moves back and forth, indicating that there is a massive object orbiting them with a period around 5.47 years. Based on the mass of the object, its lack of a visible spectrum, and circumstellar matter in the system with many heavy elements (as would be produced by a past supernova in the system), it is probably a black hole.[10][11]

In addition to the main system, more distant components have been reported: B, at magnitude 11.5 and separation 6.2", C, at magnitude 13.2 and separation 18.9", D, at magnitude 9.88 and separation 39", and E, at magnitude 13 and separation from D of 10.4".[12]


  1. ^ a b c d e Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. arXiv:0708.1752Freely accessible. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.  Vizier catalog entry
  2. ^ a b c d Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D. 
  3. ^ a b Hoffleit, D.; Warren, W. H. (1995). "VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)". VizieR On-line Data Catalog: V/50. Originally published in: 1964BS....C......0H. 5050. Bibcode:1995yCat.5050....0H. 
  4. ^ 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....1.2025S. 
  5. ^ Pourbaix, D.; Tokovinin, A. A.; Batten, A. H.; Fekel, F. C.; Hartkopf, W. I.; Levato, H.; Morrell, N. I.; Torres, G.; Udry, S. (2004). "SB9: The ninth catalogue of spectroscopic binary orbits". Astronomy and Astrophysics. 424 (2): 727. arXiv:astro-ph/0406573Freely accessible. Bibcode:2004A&A...424..727P. doi:10.1051/0004-6361:20041213. 
  6. ^ Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971Freely accessible. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015.  Vizier catalog entry
  7. ^ Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (2011). "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun". Monthly Notices of the Royal Astronomical Society. 410: 190. arXiv:1007.4883Freely accessible. Bibcode:2011MNRAS.410..190T. doi:10.1111/j.1365-2966.2010.17434.x.  Vizier catalog entry
  8. ^ a b Hohle, M.M.; Neuhäuser, R.; Schutz, B.F. (2010). "Masses and luminosities of O- and B-type stars and red supergiants". Astronomische Nachrichten. 331 (4): 349. arXiv:1003.2335Freely accessible. Bibcode:2010AN....331..349H. doi:10.1002/asna.200911355.  Vizier catalog entry
  9. ^ Glebocki, R.; Gnacinski, P. (2005). "VizieR Online Data Catalog: Catalog of Stellar Rotational Velocities (Glebocki+ 2005)". VizieR On-line Data Catalog: III/244. Originally published in: 2005csss...13..571G; 2005yCat.3244....0G. 3244. Bibcode:2005yCat.3244....0G.  Vizier catalog entry
  10. ^ Kaler, Jim (2 Jan 2009). "V Pup". Stars. Retrieved 31 Jan 2013. 
  11. ^ Qian, S.‐B.; Liao, W.‐P.; Fernández Lajús, E. (2008). "Evidence of a Massive Black Hole Companion in the Massive Eclipsing Binary V Puppis". The Astrophysical Journal. 687: 466–470. arXiv:0806.4944Freely accessible. Bibcode:2008ApJ...687..466Q. doi:10.1086/591515. 
  12. ^ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466. Bibcode:2001AJ....122.3466M. doi:10.1086/323920.  Vizier catalog entry