Astronomy:HD 73390
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Short description: Binary star system in the constellation Carina
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Carina |
| Right ascension | 08h 35m 15.55393s[1] |
| Declination | −58° 13′ 29.0544″[1] |
| Apparent magnitude (V) | 5.25 + 8.90[2] |
| Characteristics | |
| Spectral type | B4V[3] |
| B−V color index | −0.133±0.005[4] |
| Astrometry | |
| Radial velocity (Rv) | 21.0±4.2[4] km/s |
| Proper motion (μ) | RA: -21.280[1] mas/yr Dec.: +11.230[1] mas/yr |
| Parallax (π) | 3.7340 ± 0.1418[1] mas |
| Distance | 870 ± 30 ly (270 ± 10 pc) |
| Absolute magnitude (MV) | −1.91[4] |
| Details | |
| A | |
| Mass | 7.0±0.4[5] M☉ |
| Radius | 3.9[6] R☉ |
| Luminosity | 1159.86[4] L☉ |
| Surface gravity (log g) | 4.5[7] cgs |
| Temperature | 16,571±306[8] K |
| Rotational velocity (v sin i) | 155[8] km/s |
| Age | 36.1±11.0[5] Myr |
| B | |
| Mass | 0.9+0.04 −0.02[7] M☉ |
| Temperature | 5,241±158[7] K |
| Metallicity [Fe/H] | -0.5[7] dex |
| Rotational velocity (v sin i) | 10[7] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 73390, also called e1 Carinae, is a binary star[2] system in the constellation Carina. It is approximately 870 light years from Earth. The primary is a blue-white B-type main sequence dwarf with an apparent magnitude of +5.27. It displays an infrared excess and is a candidate host of an orbiting debris disk.[10] The secondary is a magnitude 8.9 star which has a mass and temperature similar to the Sun.
References
- ↑ 1.0 1.1 1.2 1.3 1.4 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 2.0 2.1 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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.
- ↑ Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, 1, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode: 1975mcts.book.....H.
- ↑ 4.0 4.1 4.2 4.3 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 5.0 5.1 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, doi:10.1111/j.1365-2966.2010.17434.x, Bibcode: 2011MNRAS.410..190T
- ↑ Pasinetti Fracassini, L. E. et al. (2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy & Astrophysics 367 (2): 521–24, doi:10.1051/0004-6361:20000451, Bibcode: 2001A&A...367..521P.
- ↑ 7.0 7.1 7.2 7.3 7.4 Gullikson, Kevin; Kraus, Adam; Dodson-Robinson, Sarah (2016), "The Close Companion Mass-ratio Distribution of Intermediate-mass Stars", The Astronomical Journal 152 (2): 40, doi:10.3847/0004-6256/152/2/40, Bibcode: 2016AJ....152...40G.
- ↑ 8.0 8.1 Paunzen, E. et al. (2005), "An empirical temperature calibration for the Δa photometric system . I. The B-type stars", Astronomy and Astrophysics 444 (3): 941–946, doi:10.1051/0004-6361:20053546, Bibcode: 2005A&A...444..941P.
- ↑ "HD 73390". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+73390.
- ↑ Mannings, Vincent; Barlow, Michael J. (April 1998), "Candidate Main-Sequence Stars with Debris Disks: A New Sample of Vega-like Sources", The Astrophysical Journal 497 (1): 330–341, doi:10.1086/305432, Bibcode: 1998ApJ...497..330M.
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