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41 Aurigae 
Summary
41 Aurigae is a binary star[10] system located around 310–316 light years away from the Sun in the northern constellation of Auriga. It is visible to the naked eye as a dim, white-hued star with a combined apparent visual magnitude of 5.83.[10] This system is moving further from the Earth with a heliocentric radial velocity of 31 km/s.[11] It is a probable member of the Hyades Supercluster.[12]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Auriga |
| 41 Aur A | |
| Right ascension | 06h 11m 36.59156s[1] |
| Declination | +48° 42′ 39.5603″[1] |
| Apparent magnitude (V) | 6.15[2] |
| 41 Aur B | |
| Right ascension | 06h 11m 36.55589s[3] |
| Declination | +48° 42′ 47.0528″[3] |
| Apparent magnitude (V) | 6.84[2] |
| Characteristics | |
| 41 Aur A | |
| Evolutionary stage | Main sequence |
| Spectral type | A2Va+[4] |
| B−V color index | 0.06[2] |
| 41 Aur B | |
| Evolutionary stage | Am star |
| Spectral type | kA5hA5mF0(IV-V)[4] |
| B−V color index | 0.15[2] |
| Astrometry | |
| 41 Aur A | |
| Radial velocity (Rv) | 31[5] km/s |
| Proper motion (μ) | RA: +15.085[1] mas/yr Dec.: −55.907[1] mas/yr |
| Parallax (π) | 10.5367 ± 0.0689 mas[1] |
| Distance | 310 ± 2 ly (94.9 ± 0.6 pc) |
| 41 Aur B | |
| Radial velocity (Rv) | 29[5] km/s |
| Proper motion (μ) | RA: +17.183[3] mas/yr Dec.: −53.536[3] mas/yr |
| Parallax (π) | 10.3314 ± 0.0711 mas[3] |
| Distance | 316 ± 2 ly (96.8 ± 0.7 pc) |
| Details | |
| 41 Aur A | |
| Temperature | 9,000+278 −596[1] K |
| Rotational velocity (v sin i) | 138[6] km/s |
| 41 Aur B | |
| Mass | 1.99±0.10[7] M☉ |
| Radius | 1.78+0.12 −0.18[3] R☉ |
| Luminosity | 11.2±0.1[3] L☉ |
| Temperature | 7,925+421 −260[3] K |
| Rotational velocity (v sin i) | 133[7] km/s |
| Other designations | |
| 41 Aur A: GC 7853, HD 42127, HR 2176, SAO 40925[8] | |
| 41 Aur B: GC 7851, HD 42126, HR 2175, SAO 40924[9] | |
| Database references | |
| SIMBAD | data |
As of 2012, the pair had an angular separation of 7.39″ along a position angle of 357.7°.[13] The primary component is an A-type main-sequence star with a stellar classification of A2Va+[4] and a visual magnitude of 6.15.[2] The magnitude 6.84[2] secondary companion is a possible Am star[14] with a stellar classification of kA5hA5mF0(IV-V),[4] showing the calcium K line and hydrogen lines of an A5 star and the metal lines of an F0 star.
References edit
- ^ a b c d e f 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 c d e f Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; et al. (March 2000), "The Tycho-2 catalogue of the 2.5 million brightest stars", Astronomy and Astrophysics, 355: L27–L30, Bibcode:2000A&A...355L..27H, doi:10.1888/0333750888/2862.
- ^ a b c d e f g h 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 c d Gray, R. O.; Garrison, R. F. (December 1987), "The Early A-Type Stars: Refined MK Classification, Confrontation with Stroemgren Photometry, and the Effects of Rotation", Astrophysical Journal Supplement, 65: 581, Bibcode:1987ApJS...65..581G, doi:10.1086/191237.
- ^ a b Evans, D. S. (June 20–24, 1966). "The Revision of the General Catalogue of Radial Velocities". In Batten, Alan Henry; Heard, John Frederick (eds.). Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30. University of Toronto: International Astronomical Union. Bibcode:1967IAUS...30...57E.
- ^ Royer, F.; et al. (February 2007), "Rotational velocities of A-type stars. III. Velocity distributions", Astronomy and Astrophysics, 463 (2): 671–682, arXiv:astro-ph/0610785, Bibcode:2007A&A...463..671R, doi:10.1051/0004-6361:20065224, S2CID 18475298.
- ^ a b Zorec, J.; Royer, F. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691, S2CID 55586789, A120.
- ^ "41 Aur A". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-05-23.
- ^ "41 Aur B". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-05-23.
- ^ 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.
- ^ 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.
- ^ Eggen, O. J. (June 1985), "A systematic search for members of the Hyades Supercluster. IV - The metallic-line stars and ultrashort-period Cepheids", Astronomical Journal, 90: 1046−1059, Bibcode:1985AJ.....90.1046E, doi:10.1086/113812.
- ^ Mason, Brian D.; et al. (May 2012), "Speckle Interferometry at the U.S. Naval Observatory. XVIII", The Astronomical Journal, 143 (5): 6, Bibcode:2012AJ....143..124M, doi:10.1088/0004-6256/143/5/124, 124.
- ^ Renson, P.; Manfroid, J. (2009), "Catalogue of Ap, HgMn and Am stars", Astronomy and Astrophysics, 498 (3): 961–966, Bibcode:2009A&A...498..961R, doi:10.1051/0004-6361/200810788.