HD 47500

From Wikipedia, the free encyclopedia
HD 47500
Observation data
Epoch J2000      Equinox J2000
Constellation Columba
A
Right ascension 06h 37m 13.84s[1]
Declination −36° 59′ 26.37″[1]
Apparent magnitude (V) 5.91±0.01[1]
B
Right ascension 06h 37m 13.84s[1]
Declination −36° 59′ 25.91″[1]
Apparent magnitude (V) 7.51±0.01[1]
Characteristics
A
Spectral type B5/7 IV[2]
U−B color index −0.52[3]
B−V color index −0.12[3]
Astrometry
Radial velocity (Rv)21±4[4] km/s
Proper motion (μ) RA: −9.53[5] mas/yr
Dec.: +13.57[5] mas/yr
Parallax (π)2.85 ± 0.48[5] mas
Distance1,142±84 ly
(351±26 pc)
Absolute magnitude (MV)−1.93[6]
Details
A
Mass5.17±0.35[7] M☉
Luminosity1,482+665
−459[7] L☉
Surface gravity (log g)3.61[8] cgs
Temperature13,836±96[7] K
Metallicity [Fe/H]−0.07[8] dex
Rotational velocity (v sin i)36[9] km/s
Age34±1[7] Myr
Other designations
112 G. Columbae, CD−36 3031, HD 47500, HIP 31637, HR 2446, WDS J06372-3659
Database references
SIMBADThe system
A
B

HD 47500 (HR 2446) is a binary star[citation needed] in the southern constellation Columba. Components A and B have apparent magnitude(s) of 5.91 and 7.51 respectively. The system is located around 1,142 light years away from the Solar System, but is drifting away with a heliocentric radial velocity of 21 km/s.

Properties[]

The visible component has a classification of "B5/7 IV", which indicates that it is a subgiant with characteristics intermediate between a B5 and B7 star. It has a mass of 5 M☉ and a radius of 5.9 R☉. HD 47500A radiates at 1,482 solar luminosities at an effective temperature of 13,836 K, which gives it a blue-white hue. It has a projected rotational velocity of 36 km/s.

References[]

  1. ^ a b c d e f Fabricius, C.; Høg, E.; Makarov, V. V.; Mason, B. D.; Wycoff, G. L.; Urban, S. E. (1 March 2002). "The Tycho double star catalogue". Astronomy and Astrophysics. 384: 180–189. Bibcode:2002A&A...384..180F. doi:10.1051/0004-6361:20011822. ISSN 0004-6361.
  2. ^ Houk, N. (1 January 1982). Michigan Catalogue of Two-dimensional Spectral Types for the HD stars. Volume_3. Declinations -40_ƒ0 to -26_ƒ0. Bibcode:1982mcts.book.....H.
  3. ^ a b Deutschman, W. A.; Davis, R. J.; Schild, R. E. (1 February 1976). "The galactic distribution of interstellar absorption as determined from the Celescope catalog of ultraviolet stellar observations and a new catalog of UBV, H-beta photoelectric observations". The Astrophysical Journal Supplement Series. 30: 97–225. Bibcode:1976ApJS...30...97D. doi:10.1086/190359. ISSN 0067-0049.
  4. ^ Kharchenko, N. V.; Scholz, R. -D.; Piskunov, A. E.; Röser, S.; Schilbach, E. (1 November 2007). "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ~55000 stars and mean radial velocities of 516 Galactic open clusters and associations". Astronomische Nachrichten. 328 (9): 889–896. Bibcode:2007AN....328..889K. doi:10.1002/asna.200710776. ISSN 0004-6337. S2CID 119323941.
  5. ^ a b van Leeuwen, F. (1 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. ISSN 0004-6361. S2CID 18759600.
  6. ^ Anderson, E.; Francis, Ch. (1 May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. ISSN 1063-7737. S2CID 119257644.
  7. ^ a b c d Zorec, J.; Royer, F. (1 January 2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities". Astronomy and Astrophysics. 537: A120. arXiv:1201.2052. Bibcode:2012A&A...537A.120Z. doi:10.1051/0004-6361/201117691. ISSN 0004-6361. S2CID 55586789.
  8. ^ a b Anders, F.; et al. (1 August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy and Astrophysics. 628: A94. arXiv:1904.11302. Bibcode:2019A&A...628A..94A. doi:10.1051/0004-6361/201935765. ISSN 0004-6361. S2CID 131780028.
  9. ^ Levato, H.; Grosso, M. (1 June 2004). "New Projected Rotational Velocities of All Southern B-type Stars of the Bright Star Catalogue". Stellar Rotation. 215: 51. Bibcode:2004IAUS..215...51L.
Retrieved from ""