HD 73390

This article is about e¹ Carinae. For e² Carinae, see HD 73389. For E Carinae, see V345 Carinae.

Not to be confused with ε 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  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
e01 Car, BD−57°1590, GC 11796, HD 73390, HIP 42129, HR 3415, SAO 236105, CCDM J08353-5813, WDS J08353-5813 [9]
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. 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 , S2CID   14878976.
3. 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.
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, S2CID   119257644.
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 , S2CID   118629873
6. 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.
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 , S2CID   119179065.
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, S2CID   119436374.
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 .