Star in the constellation Perseus
This article is about the star. For the open cluster , see χ Persei .
7 Persei is a star in the constellation Perseus , located 774 light years away from the Sun. While the star bears the Bayer designation Chi Persei , it is not to be confused with the entire cluster NGC 884 , commonly referred to as Chi Persei. It is faintly visible to the naked eye as a dim, yellow-hued star with an apparent visual magnitude of 5.99. This object is moving closer to the Earth with a heliocentric radial velocity of −12.5 km/s.
This is an evolved giant star with a stellar classification of G7 III, most likely (93% chance) on the horizontal branch . At the age of 191 million years, it has 3.84 times the mass of the Sun but has expanded to 24 times the Sun's radius . The star is radiating 316 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,974 K.
References
^ 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 .
^ 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 .
^ Stock, Stephan; et al. (August 2018), "Precise radial velocities of giant stars. X. Bayesian stellar parameters and evolutionary stages for 372 giant stars from the Lick planet search", Astronomy & Astrophysics , 616 : 15, arXiv :1805.04094 , Bibcode :2018A&A...616A..33S , doi :10.1051/0004-6361/201833111 , S2CID 119361866 , A33.
^ Currie, Thayne; et al. (2010), "The Stellar Population of h and χ Persei: Cluster Properties, Membership, and the Intrinsic Colors and Temperatures of Stars", The Astrophysical Journal Supplement , 186 (2): 191–221, arXiv :0911.5514 , Bibcode :2010ApJS..186..191C , doi :10.1088/0067-0049/186/2/191 , S2CID 16454332 .
^ Takeda, Yoichi; et al. (August 2008), "Stellar Parameters and Elemental Abundances of Late-G Giants", Publications of the Astronomical Society of Japan , 60 (4): 781–802, arXiv :0805.2434 , Bibcode :2008PASJ...60..781T , doi :10.1093/pasj/60.4.781 , S2CID 16258166 .
^ Liu, Y. J.; et al. (April 2014), "The Lithium Abundances of a Large Sample of Red Giants", The Astrophysical Journal , 785 (2): 12, arXiv :1404.1687 , Bibcode :2014ApJ...785...94L , doi :10.1088/0004-637X/785/2/94 , S2CID 119226316 , 94.
Rodrigues da Silva, R.; et al. (March 2015), "On the Nature of Rapidly Rotating Single Evolved Stars", The Astrophysical Journal , 801 (1): 6, arXiv :1503.03447 , Bibcode :2015ApJ...801...54R , doi :10.1088/0004-637X/801/1/54 , S2CID 119271718 , 54
"chi Per" . SIMBAD Centre de données astronomiques de Strasbourg . Retrieved 2019-03-24.
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