HD 110073
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| 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 mas[1] |
| 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 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
[edit]- ^ a b c d e 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
- ^ a b c d e f 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 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.
- ^ a b c d e f g h i 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
- ^ 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.
- ^ a b c 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, Bibcode:1975Ap&SS..37..197B, doi:10.1007/BF00646073, S2CID 122985118.
- ^ "HD 110073". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-01-30.
- ^ 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.
- ^ 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.
