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V376 Carinae
	; A light curve for V376 Carinae, plotted from TESS data
Observation data; Epoch J2000 Equinox J2000
Constellation	Carina
Right ascension	08h 56m 58.41666s
Declination	−59° 13′ 45.6032″
Apparent magnitude (V)	4.69 (4.87 + 6.58)
Characteristics
Spectral type	B2V + B9.5V
B−V color index	−0.182±0.004
Astrometry
Radial velocity (Rv)	+26.8±2.8 km/s
Proper motion (μ)	RA: −8.409±0.406 mas/yr ; Dec.: +8.421±0.322 mas/yr
Parallax (π)	5.0495 ± 0.1667 mas
Distance	650 ± 20 ly ; (198 ± 7 pc)
Absolute magnitude (MV)	−1.64
Details
A
Mass	7.8±0.1 M☉
Luminosity (bolometric)	2,998 L☉
Temperature	21,150 K
Age	12.5±1.6 Myr
Other designations
	b1 Car, V376 Carinae, CD−58°1301, FK5 1233, GC 12405, HD 77002, HIP 43937, HR 3582, SAO 236436, CCDM J08570-5914, WDS J08570-5914
Database references
SIMBAD	data

V376 Carinae is a binary star^[3] system in the southern constellation of Carina. It has the Bayer designation b¹ Carinae; V376 Carinae is the variable star designation. The system is visible to the naked eye as a faint point of light with a combined apparent magnitude of +4.69.^[3] The distance to this system from the Sun is approximately 650 light years based on parallax.^[2] It is drifting further away with a radial velocity of +27 km/s.^[6]

The magnitude 4.87^[4] primary, designated component A, is a B-type main-sequence star with a stellar classification of B2V.^[5] During a search for Beta Cephei variables in the southern sky, it was initially classed as a very short period variable.^[10] However, this variability was not confirmed by subsequent observations.^[11] Samus et al. (2017) now suspect it is a constant star that was assigned a variable designation in haste.^[12] It has an estimated age of 12.5 million years with 7.8 times the mass of the Sun.^[7] The star is radiating nearly three thousand times the Sun's luminosity from its photosphere at an effective temperature of 21,150 K.^[8]

The companion star, component B, was discovered by Scottish astronomer James Dunlop in 1836.^[4] It has a class of B9.5V^[3] with an apparent magnitude of +6.58. As of 2010, the secondary had an angular separation of 40.1″ from the primary along a position angle of 76°.^[4]

References

^ "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 8 December 2021.
^ ^a ^b ^c ^d ^e ^f 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.
^ ^a ^b ^c ^d ^e 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.
^ ^a ^b ^c ^d Mason, B. D.; et al. (2014). "The Washington Visual Double Star Catalog". The Astronomical Journal. 122 (6): 3466–3471. Bibcode:2001AJ....122.3466M. doi:10.1086/323920.
^ ^a ^b Houk, Nancy (1979). Michigan catalogue of two-dimensional spectral types for the HD stars. Vol. 1. Ann Arbor, Michigan: Department of Astronomy, University of Michigan. Bibcode:1978mcts.book.....H.
^ ^a ^b ^c ^d 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.
^ ^a ^b ^c Tetzlaff, N.; et al. (January 2011). "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun". Monthly Notices of the Royal Astronomical Society. 410 (1): 190–200. arXiv:1007.4883. Bibcode:2011MNRAS.410..190T. doi:10.1111/j.1365-2966.2010.17434.x. S2CID 118629873.
^ ^a ^b ^c Hohle, M. M.; et al. (April 2010), "Masses and luminosities of O- and B-type stars and red supergiants", Astronomische Nachrichten, 331 (4): 349, arXiv:1003.2335, Bibcode:2010AN....331..349H, doi:10.1002/asna.200911355, S2CID 111387483
^ "HD 77002". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-08-08.
^ Jakate, S. M. (April 1979). "A search for Beta Cephei stars. III. Photometric studies of southern B-type stars". Astronomical Journal. 84: 552–558. Bibcode:1979AJ.....84..552J. doi:10.1086/112448.
^ Balona, L. A. (March 1982). "Observations of Early-Type Ultra-Short Period Variables". Information Bulletin on Variable Stars. 2120: 1. Bibcode:1982IBVS.2120....1B.
^ Samus, N. N.; et al. (2017). "General Catalogue of Variable Stars". Astronomy Reports. 5.1. 61 (1): 80–88. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085. S2CID 125853869.

[MAST-1] "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 8 December 2021.

[GaiaDR2-2] ^ ^a ^b ^c ^d ^e ^f 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.

[Eggleton2008-3] 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.

[WDSC2014-4] Mason, B. D.; et al. (2014). "The Washington Visual Double Star Catalog". The Astronomical Journal. 122 (6): 3466–3471. Bibcode:2001AJ....122.3466M. doi:10.1086/323920.

[Houk1979-5] Houk, Nancy (1979). Michigan catalogue of two-dimensional spectral types for the HD stars. Vol. 1. Ann Arbor, Michigan: Department of Astronomy, University of Michigan. Bibcode:1978mcts.book.....H.

[Anderson2012-6] 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.

[Tetzlaff2011-7] Tetzlaff, N.; et al. (January 2011). "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun". Monthly Notices of the Royal Astronomical Society. 410 (1): 190–200. arXiv:1007.4883. Bibcode:2011MNRAS.410..190T. doi:10.1111/j.1365-2966.2010.17434.x. S2CID 118629873.

[Hohle2010-8] Hohle, M. M.; et al. (April 2010), "Masses and luminosities of O- and B-type stars and red supergiants", Astronomische Nachrichten, 331 (4): 349, arXiv:1003.2335, Bibcode:2010AN....331..349H, doi:10.1002/asna.200911355, S2CID 111387483

[SIMBAD-9] "HD 77002". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-08-08.

[Jakate1979-10] Jakate, S. M. (April 1979). "A search for Beta Cephei stars. III. Photometric studies of southern B-type stars". Astronomical Journal. 84: 552–558. Bibcode:1979AJ.....84..552J. doi:10.1086/112448.

[Balona1982-11] Balona, L. A. (March 1982). "Observations of Early-Type Ultra-Short Period Variables". Information Bulletin on Variable Stars. 2120: 1. Bibcode:1982IBVS.2120....1B.

[Samus2017-12] Samus, N. N.; et al. (2017). "General Catalogue of Variable Stars". Astronomy Reports. 5.1. 61 (1): 80–88. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085. S2CID 125853869.

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V376 Carinae

References

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