HD 83058

This article is about L Velorum. For l Velorum, see HD 79917.

HD 83058 is a subgiant star in the constellation Vela and a spectroscopic binary. It is visible to the naked eye with an apparent visual magnitude of 5.0. Based upon an annual parallax shift of 3.4254 mas, it is located 950 light-years from the Sun. The system is moving further away with a heliocentric radial velocity of +35 km/s.

HD 83058

Observation data Epoch J2000      Equinox J2000
Constellation	Vela
Right ascension	09h 34m 08.793s[1]
Declination	−51° 15′ 18.95″[1]
Apparent magnitude (V)	5.00[2]
Characteristics
Evolutionary stage	subgiant
Spectral type	B2 IV[3]
U−B color index	−0.97[2]
B−V color index	−0.19[2]
Astrometry
Radial velocity (Rv)	+16.5±3.0[4] km/s
Proper motion (μ)	RA: −130.55[1] mas/yr Dec.: +42.98[1] mas/yr
Parallax (π)	3.4252 ± 0.1907 mas[1]
Distance	950 ± 50 ly (290 ± 20 pc)
Absolute magnitude (MV)	−2.84[2]
Details
primary
Mass	9.3[5] M☉
Radius	5.405[6] R☉
Luminosity	2,686[6] L☉
Surface gravity (log g)	3.779[6] cgs
Temperature	17,887[6] K
Rotational velocity (v sin i)	64±2[4] km/s
Age	14.1[5] Myr
secondary
Rotational velocity (v sin i)	24±2[4] km/s
Other designations
L Vel, CD−50°4270, FK5 2764, HD 83058, HIP 46950, HR 3819, SAO 237107[7]
Database references
SIMBAD	data

HD 83058 has generally been considered to be a single star,^[8] but high-resolution spectra show it to be a double-lined spectroscopic binary.^[9] The two components have approximately the same spectral type.^[4] Line-profile variations have been detected which suggest that at least one component pulsates, as is common for stars of this spectral class.^[10]

HD 83058 was proposed as a runaway star from a supernova explosion. However, the discovery that it is a binary makes this unlikely.^[4]

References

1. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
2. 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.
3. Houk, Nancy (1978). Michigan catalogue of two-dimensional spectral types for the HD stars. Bibcode:1978mcts.book.....H.
4. Jilinski, E.; Ortega, V. G.; Drake, N. A.; de la Reza, R. (2010). "A Dynamical Study of Suspected Runaway Stars as Traces of Past Supernova Explosions in the Region of the Scorpius-Centaurus OB Association". The Astrophysical Journal. 721 (1): 469. Bibcode:2010ApJ...721..469J. doi:10.1088/0004-637X/721/1/469. S2CID 122201360.
5. 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 (1): 190. arXiv:1007.4883. Bibcode:2011MNRAS.410..190T. doi:10.1111/j.1365-2966.2010.17434.x. S2CID 118629873.
6. McDonald, I.; Zijlstra, A. A.; Watson, R. A. (2017). "Fundamental parameters and infrared excesses of Tycho-Gaia stars". Monthly Notices of the Royal Astronomical Society. 471 (1): 770. arXiv:1706.02208. Bibcode:2017MNRAS.471..770M. doi:10.1093/mnras/stx1433. S2CID 73594365.
7. "HD 83058". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-10-07.
8. Eggleton, P. P.; Tokovinin, A. A. (2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. S2CID 14878976.
9. Chini, R.; Hoffmeister, V. H.; Nasseri, A.; Stahl, O.; Zinnecker, H. (2012). "A spectroscopic survey on the multiplicity of high-mass stars". Monthly Notices of the Royal Astronomical Society. 424 (3): 1925. arXiv:1205.5238. Bibcode:2012MNRAS.424.1925C. doi:10.1111/j.1365-2966.2012.21317.x. S2CID 119120749.
10. Telting, J. H.; Schrijvers, C.; Ilyin, I. V.; Uytterhoeven, K.; De Ridder, J.; Aerts, C.; Henrichs, H. F. (2006). "A high-resolution spectroscopy survey of β Cephei pulsations in bright stars". Astronomy and Astrophysics. 452 (3): 945. Bibcode:2006A&A...452..945T. doi:10.1051/0004-6361:20054730. hdl:2066/36162.