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.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| 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 mas[1] |
| 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 |
References
edit- ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ a b 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.
- ^ Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 1, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1975mcts.book.....H.
- ^ a b c d 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 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, arXiv:1007.4883, Bibcode:2011MNRAS.410..190T, doi:10.1111/j.1365-2966.2010.17434.x, S2CID 118629873
- ^ Pasinetti Fracassini, L. E.; et al. (2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy & Astrophysics, 367 (2) (Third ed.): 521–24, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754.
- ^ a b c d e Gullikson, Kevin; Kraus, Adam; Dodson-Robinson, Sarah (2016), "The Close Companion Mass-ratio Distribution of Intermediate-mass Stars", The Astronomical Journal, 152 (2): 40, arXiv:1604.06456, Bibcode:2016AJ....152...40G, doi:10.3847/0004-6256/152/2/40, S2CID 119179065.
- ^ a b 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, arXiv:astro-ph/0509049, Bibcode:2005A&A...444..941P, doi:10.1051/0004-6361:20053546, S2CID 119436374.
- ^ "HD 73390". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-01-08.
- ^ 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, Bibcode:1998ApJ...497..330M, doi:10.1086/305432.