57 Persei
Star in the constellation Perseus
57 Persei , or m Persei , is a suspected triple star [ 10] system in the northern constellation of Perseus . It is at the lower limit of visibility to the naked eye, having a combined apparent visual magnitude of 6.08.[ 2] The annual parallax shift of 16.4 mas provides a distance measure of 199 light years . 57 Persei is moving closer to the Sun with a radial velocity of about −23[ 5] km/s and will make perihelion in around 2.6 million years at a distance of roughly 22 ly (6.6 pc).[ 11]
The primary member, 57 Persei, is a magnitude 6.18,[ 10] yellow-white hued F-type main-sequence star with a stellar classification of F0 V,[ 3] indicating it is generating energy by fusing its core hydrogen . It is an estimated 1.6[ 7] billion years old and is spinning with a projected rotational velocity of 90 km/s.[ 3] The star has 1.3[ 7] times the mass of the Sun and is radiating 11 times the Sun's luminosity from its photosphere at an effective temperature of around 6,615 K .[ 7]
An unseen companion has been identified via slight changes to the proper motion of the primary.[ 10] The third possible member of the system, designated component B,[ 12] is a magnitude 6.87 F-type star at an angular separation of 120.13 arc seconds .[ 10] This star has a different parallax and space velocity than the primary,[ 13] so it may just be a wide visual companion .[ 12] There are three other nearby visual companions that are not physically associated with the 57 Persei system.[ 12]
References
^ a b c d e f g Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties" . Astronomy and Astrophysics . 674 : A1. arXiv :2208.00211 . Bibcode :2023A&A...674A...1G . doi :10.1051/0004-6361/202243940 . S2CID 244398875 .
Gaia DR3 record for this source at VizieR .
^ a b Høg, E.; et al. (2000), "The Tycho-2 catalogue of the 2.5 million brightest stars", Astronomy and Astrophysics , 355 : L27, Bibcode :2000A&A...355L..27H , doi :10.1888/0333750888/2862 .
^ a b c d 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 Dorrit Hoffleit (1991). Combined\bsc5: The Bright Star Catalogue. 5th Ed., Preliminary Version . Yale University Observatory.
^ a b de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics , 546 : 14, arXiv :1208.3048 , Bibcode :2012A&A...546A..61D , doi :10.1051/0004-6361/201219219 , S2CID 59451347 , A61.
^ 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 .
^ a b c d e f g David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal , 804 (2): 146, arXiv :1501.03154 , Bibcode :2015ApJ...804..146D , doi :10.1088/0004-637X/804/2/146 , S2CID 33401607 .
^ Casagrande, L.; et al. (June 2011), "New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey", Astronomy and Astrophysics , 530 : A138, arXiv :1103.4651 , Bibcode :2011A&A...530A.138C , doi :10.1051/0004-6361/201016276 , S2CID 56118016 .
^ "57 Per" . SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2018-01-30 .
^ a b c d 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 .
^ Bailer-Jones, C. A. L. (March 2015), "Close encounters of the stellar kind", Astronomy & Astrophysics , 575 : 13, arXiv :1412.3648 , Bibcode :2015A&A...575A..35B , doi :10.1051/0004-6361/201425221 , S2CID 59039482 , A35.
^ a b c Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal , 122 (6): 3466, Bibcode :2001AJ....122.3466M , doi :10.1086/323920
^ Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties" . Astronomy and Astrophysics . 674 : A1. arXiv :2208.00211 . Bibcode :2023A&A...674A...1G . doi :10.1051/0004-6361/202243940 . S2CID 244398875 .
Gaia DR3 record for this source at VizieR .