HD 83944

Last updated
HD 83944
Observation data
Epoch J2000.0       Equinox J2000.0
Constellation Carina
Right ascension 09h 39m 20.99948s [1]
Declination −61° 19′ 41.0167″ [1]
Apparent magnitude  (V)4.51 [2]
Characteristics
Evolutionary stage Main sequence [3]
Spectral type B9IV/V [4]
B−V color index −0.070±0.340 [2]
Variable type suspected [5]
Astrometry
Radial velocity (Rv)20.0±4.2 [2]  km/s
Proper motion (μ)RA: −34.09 [1]   mas/yr
Dec.: +18.55 [1]   mas/yr
Parallax (π)14.45 ± 0.15  mas [1]
Distance 226 ± 2  ly
(69.2 ± 0.7  pc)
Absolute magnitude  (MV)0.31 [2]
Details
Mass 2.88±0.03 [3]   M☉
Luminosity 95.71 [2]   L☉
Surface gravity (log g)4.33±0.14 [6]   cgs
Temperature 11,561±393 [6]   K
Rotational velocity (v sin i)36 [3] or 51 [6]  km/s
Age 99 [6]   Myr
Other designations
m Car, NSV  4577, CPD−60°1477, GC  13355, HD  83944, HIP  47391, HR  3856, SAO  250653 [7]
Database references
SIMBAD data

HD 83944 is a star system in the constellation Carina. This has the Bayer designation m Carinae, while HD 83944 is the identifier from the Henry Draper catalogue . It is a suspected variable with an apparent visual magnitude that fluctuates around 4.51 [2] with an amplitude of 0.5. [8] The system is located at a distance of approximately 226  light years from the Sun based on parallax, and it has an absolute magnitude of 0.31. [2] It is a member of the Carina association of co-moving stars. [9]

Although previously believed to be a single star, [10] Chini et al. (2012) found this to be a double-lined spectroscopic binary. [11] The stellar classification of B9IV/V matches a star that is entering the subgiant phase, [4] although stellar models suggest it is still in the main sequence. [3]

Related Research Articles

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<span class="mw-page-title-main">Iota Canis Majoris</span> Variable star in the constellation Canis Major

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<span class="mw-page-title-main">V382 Carinae</span> Star in the constellation Carina

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<span class="mw-page-title-main">HD 96919</span> Variable star in the constellation Carina

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<span class="mw-page-title-main">2 Centauri</span> Star in the constellation Centaurus

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HD 36678 is single star in the northern constellation of Auriga. This star is dimly visible to the naked eye with an apparent visual magnitude of 5.83. It is located at a distance of approximately 840 light years from the Sun based on parallax.

<span class="mw-page-title-main">W Andromedae</span> Variable star in the constellation Andromeda

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<span class="mw-page-title-main">28 Monocerotis</span> Star in the constellation Monoceros

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Mu Muscae, Latinized from μ Muscae, is a solitary star in the southern constellation of Musca. It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of around 4.75. Based upon an annual parallax shift of 7.21 mas as seen from Earth, it is located about 450 light years from the Sun. The star is drifting further away with a radial velocity of +37 km/s.

<span class="mw-page-title-main">Sigma Ophiuchi</span> Star in the constellation Ophiuchus

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<span class="mw-page-title-main">31 Pegasi</span> Star in the constellation Pegasus

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<span class="mw-page-title-main">17 Persei</span> Star in the constellation Perseus

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<span class="mw-page-title-main">21 Persei</span> Star in the constellation Perseus

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<span class="mw-page-title-main">QU Normae</span> Star in the constellation Norma

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<span class="mw-page-title-main">V538 Carinae</span> Variable star in the constellation Carina

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References

  1. 1 2 3 4 5 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 .
  2. 1 2 3 4 5 6 7 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. 1 2 3 4 Zorec, J.; Royer, F. (January 2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv: 1201.2052 , Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691, S2CID   55586789.
  4. 1 2 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. ↑ 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: B/gcvs, Bibcode:2009yCat....102025S.
  6. 1 2 3 4 David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal, 804 (2): 146, arXiv: 1501.03154 , Bibcode:2015ApJ...804..146D, doi:10.1088/0004-637X/804/2/146, S2CID   33401607.
  7. ↑ "HD 83944". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2020-01-26.
  8. ↑ 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.
  9. ↑ Gagné, Jonathan; Faherty, Jacqueline K. (August 2018), "BANYAN. XIII. A First Look at Nearby Young Associations with Gaia Data Release 2", The Astrophysical Journal, 862 (2): 12, arXiv: 1805.11715 , Bibcode:2018ApJ...862..138G, doi: 10.3847/1538-4357/aaca2e , S2CID   119196799, 138.
  10. ↑ 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.
  11. ↑ Chini, R.; et al. (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.
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