HD 41534

HD 41534

Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Columba
Right ascension	06^h 04^m 20.26492^s[1]
Declination	−32° 10′ 20.7434″[1]
Apparent magnitude (V)	5.65[2]
Characteristics
Evolutionary stage	main sequence
Spectral type	B2V[3]
U−B color index	−0.82[4]
B−V color index	−0.186±0.003[2]
Astrometry
Radial velocity (Rv)	+93.0±3.7[5] km/s
Proper motion (μ)	RA: −16.144[1] mas/yr Dec.: +121.467[1] mas/yr
Parallax (π)	3.4507 ± 0.0857 mas[1]
Distance	950 ± 20 ly (290 ± 7 pc)
Absolute magnitude (MV)	−1.78[2]
Details
Mass	6.9+0.75 −0.68[6] M☉
Radius	3.90[7] R☉
Luminosity	1621.15[2] L☉
Surface gravity (log g)	4.0±0.25[6] cgs
Temperature	20,000±1,000[6] K
Rotational velocity (v sin i)	122[8] km/s
Age	14+13 −8[6] Myr
Other designations
72G. Col[9], CD−32°1008, FK5 41534, GC 7708, HD 41534, HIP 28756, HR 2149, SAO 196459, PPM 282235, CCDM J06043-3210AB, WDS J06043-3210AB[10]
Database references
SIMBAD	data

HD 41534 is a binary star[11] system in the southern constellation of Columba. It is dimply visible to the naked eye with a combined apparent visual magnitude of 5.65.[2] The distance to this system is approximately 950 light-years based on parallax,[1] and it is receding from the Sun with a radial velocity of +93 km/s.[5] This is a runaway star system with an unusually high peculiar velocity of 187.6+12.2
−13.8 km/s.[12] It is thought to have been ejected from the OB association Sco OB 1 approximately 14 million years ago.[13]

The primary component is a B-type main-sequence star with a stellar classification of B2V.[3] It displays microvariability with an amplitude of 0.0086 in magnitude and a frequency of 0.11316 cycles per day.[14] The star is an estimated 14[6] million years old with a high rate of spin, showing a projected rotational velocity of 122.[8] It has seven[6] times the mass of the Sun and about four[7] times the Sun's radius. HD 41534 is radiating over 1,600[2] times the luminosity of the Sun from its photosphere at an effective temperature of 20,000 K.[6]

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. 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.
3. Houk, Nancy (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 3, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode:1982mcts.book.....H.
4. Hoffleit, Dorrit; Warren, W. H. Jr. (November 1995), "Bright Star Catalogue", VizieR On-line Data Catalog (5th Revised ed.), Bibcode:1995yCat.5050....0H HR 2149
5. Kharchenko, N. V.; et al. (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, arXiv:0705.0878, Bibcode:2007AN....328..889K, doi:10.1002/asna.200710776, S2CID 119323941.
6. Gullikson, Kevin; et al. (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.
7. Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics, 367 (2) (Third ed.): 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754.
8. Balona, L. A. (1975), "Equivalent widths and rotational velocities of southern early-type stars", Memoirs of the Royal Astronomical Society, 78: 51, Bibcode:1975MmRAS..78...51B.
9. HD 41534 is Gould's 72nd of Columba in his Uranometria Argentina. Some astronomers wrongly called it as simply "72 Col".
   

   Gould, Benjamin Apthorp (1879), Uranometria Argentina, vol. 1, Observatorio Nacional Argentino, p. 172

10. "HD 41534". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-01-01.
11. 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.
12. 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.
13. van Albada, T. S. (May 1961), "72 Columbae, a B3V run-away star from the association I Scorpii", Bulletin of the Astronomical Institutes of the Netherlands, 15: 301, Bibcode:1961BAN....15..301V.
14. Koen, Chris; Eyer, Laurent (2002), "New periodic variables from the Hipparcos epoch photometry", Monthly Notices of the Royal Astronomical Society, 331 (1): 45–59, arXiv:astro-ph/0112194, Bibcode:2002MNRAS.331...45K, doi:10.1046/j.1365-8711.2002.05150.x, S2CID 10505995.