HD 110073

Last updated
HD 110073
Observation data
Epoch J2000.0       Equinox J2000.0
Constellation Centaurus [1]
Right ascension 12h 39m 52.52839s [2]
Declination −55° 58′ 31.8904″ [2]
Apparent magnitude  (V)+4.63 [1]
Characteristics
Spectral type B8II/III [3]
B−V color index −0.082±0.013 [1]
Astrometry
Radial velocity (Rv)+15.1±2.8 [1] km/s
Proper motion (μ)RA: −43.38 [2] mas/yr
Dec.: −25.25 [2] mas/yr
Parallax (π)8.94±0.24  mas [2]
Distance 365 ± 10  ly
(112 ± 3  pc)
Absolute magnitude  (MV)−0.61 [1]
Details
HD 110073 A
Mass 4.0±0.2 [4]   M☉
Radius 3.7 [5]   R☉
Luminosity 385 [4]   L☉
Surface gravity (log g)3.35 [6]   cgs
Temperature 12,900 [4]   K
Metallicity [Fe/H]−0.90 [6]   dex
Rotational velocity (v sin i)46±10 [7]  km/s
Age 129 [4]   Myr
HD 110073 B
Mass 1.13 [4]   M☉
Luminosity1.2 [4]   L☉
Temperature 5,662 [4]   K
Other designations
l Cen, CD−39°7748, HD 110073, HIP 61789, HR 4817, SAO 203681 [8]
Database references
SIMBAD data

HD 110073 is a star in the southern constellation Centaurus, near the southern constellation border with Crux. It has the Bayer designation l Centauri (lower case L), while HD 110073 is the star's identifier from the Henry Draper catalogue . This system is faintlyvisible to the naked eye with an apparent visual magnitude of +4.63. [1] It is located at a distance of approximately 365  light years from the Sun based on parallax, and is drifting further away with a radial velocity of +15 km/s. [1]

This is a single-lined spectroscopic binary star system that belongs to the Pleiades stream. [4] As of 2011, the pair had a linear projected separation of 130.8±12.1  AU . [9] The primary component is a mercury-manganese star [6] with a stellar classification of B8II/III. [3] These stars are often helium-weak, but this is one of the most normal members of this group in terms of helium abundance. [10] The system is a source for X-ray emission, which is most likely coming from the lower mass companion – it may even be a pre-main-sequence star. [4]

References

  1. 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. XHIP record for this object at VizieR.
  2. 1 2 3 4 5 van Leeuwen, F. (November 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, S2CID   18759600
  3. 1 2 Houk, Nancy (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 3, Ann Arbor, Michigan: Department of Astronomy, University of Michigan, Bibcode:1982mcts.book.....H.
  4. 1 2 3 4 5 6 7 8 9 Hubrig, S.; et al. (June 2001), "Search for low-mass PMS companions around X-ray selected late B stars", Astronomy and Astrophysics, 372: 152–164, arXiv: astro-ph/0103201 , Bibcode:2001A&A...372..152H, doi:10.1051/0004-6361:20010452, S2CID   17507782
  5. ↑ Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) – Third edition – Comments and statistics", Astronomy and Astrophysics, 367 (2): 521–524, arXiv: astro-ph/0012289 , Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID   425754.
  6. 1 2 3 Adelman, S. J.; Philip, A. G. Davis (November 1990), "Elemental abundances of the mercury-manganese stars HR 4817 and KHI Lupi", Astronomy and Astrophysics, 238: 111, Bibcode:1990A&A...238..111A.
  7. ↑ Buscombe, W.; Stoeckley, T. R. (October 1975), "Absorption Line Profiles and Rotational Velocities for 59 Stars", Astrophysics and Space Science, 37 (1): 197–220, Bibcode:1975Ap&SS..37..197B, doi:10.1007/BF00646073, S2CID   122985118.
  8. ↑ "HD 110073". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2020-01-30.
  9. ↑ Schöller, M.; et al. (November 2010), "Multiplicity of late-type B stars with HgMn peculiarity", Astronomy and Astrophysics, 522: 12, arXiv: 1010.3643 , Bibcode:2010A&A...522A..85S, doi:10.1051/0004-6361/201014246, S2CID   119273467, A85.
  10. ↑ Adelman, S. J.; Pintado, O. I. (October 1997), "Elemental abundance analyses with Complejo Astronomico EL Leoncito REOSC echelle spectrograms", Astronomy and Astrophysics Supplement Series, 125 (2): 219–227, Bibcode:1997A&AS..125..219A, doi: 10.1051/aas:1997375 .
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