HD 73390

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.

This article is about e1 Carinae. For e2 Carinae, see HD 73389. For E Carinae, see V345 Carinae.
HD 73390
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[1] mas
Distance870 ± 30 ly
(270 ± 10 pc)
Absolute magnitude (MV)−1.91[4]
Details
A
Mass7.0±0.4[5] M☉
Radius3.9[6] R☉
Luminosity1159.86[4] L☉
Surface gravity (log g)4.5[7] cgs
Temperature16,571±306[8] K
Rotational velocity (v sin i)155[8] km/s
Age36.1±11.0[5] Myr
B
Mass0.9+0.04
−0.02[7] M☉
Temperature5,241±158[7] K
Metallicity [Fe/H]-0.5[7] dex
Rotational velocity (v sin i)10[7] km/s
Other designations
e01 Car, BD−57°1590, GC 11796, HD 73390, HIP 42129, HR 3415, SAO 236105, CCDM J08353-5813, WDS J08353-5813[9]
Database references
SIMBADdata

References
  1. 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.
  2. 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.
  3. 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. 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.
  5. 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
  6. Pasinetti Fracassini, L. E.; et al. (2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy & Astrophysics (Third ed.), 367 (2): 521–24, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451.
  7. 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.
  8. 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.
  9. "HD 73390". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-01-08.
  10. 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.
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