Astronomy:HD 110073
Observation data Equinox J2000.0]] (ICRS) | |
---|---|
Constellation | Centaurus |
Right ascension | 12h 39m 52.52839s[1] |
Declination | −55° 58′ 31.8904″[1] |
Apparent magnitude (V) | +4.63[2] |
Characteristics | |
Spectral type | B8II/III[3] |
B−V color index | −0.082±0.013[2] |
Astrometry | |
Radial velocity (Rv) | +15.1±2.8[2] km/s |
Proper motion (μ) | RA: −43.38[1] mas/yr Dec.: −25.25[1] mas/yr |
Parallax (π) | 8.94 ± 0.24[1] mas |
Distance | 365 ± 10 ly (112 ± 3 pc) |
Absolute magnitude (MV) | −0.61[2] |
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☉ |
Luminosity | 1.2[4] L☉ |
Temperature | 5,662[4] K |
Other designations | |
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.[2] 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.[2]
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 astronomical unit|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
- ↑ 1.0 1.1 1.2 1.3 1.4 van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 3.0 3.1 Houk, Nancy (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, 3, Ann Arbor, Michigan: Department of Astronomy, University of Michigan, Bibcode: 1982mcts.book.....H.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 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, doi:10.1051/0004-6361:20010452, Bibcode: 2001A&A...372..152H
- ↑ 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, doi:10.1051/0004-6361:20000451, Bibcode: 2001A&A...367..521P.
- ↑ 6.0 6.1 6.2 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.
- ↑ Buscombe, W.; Stoeckley, T. R. (October 1975), "Absorption Line Profiles and Rotational Velocities for 59 Stars", Astrophysics and Space Science 37 (1): 197–220, doi:10.1007/BF00646073, Bibcode: 1975Ap&SS..37..197B.
- ↑ "HD 110073". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+110073.
- ↑ Schöller, M. et al. (November 2010), "Multiplicity of late-type B stars with HgMn peculiarity", Astronomy and Astrophysics 522: 12, doi:10.1051/0004-6361/201014246, A85, Bibcode: 2010A&A...522A..85S.
- ↑ 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, doi:10.1051/aas:1997375, Bibcode: 1997A&AS..125..219A.
Original source: https://en.wikipedia.org/wiki/HD 110073.
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