Chi Piscium
Yellow-hued giant star in the constellation Pisces
Chi Piscium (χ Piscium ) is a solitary,[ 9] orange-hued star in the zodiac constellation of Pisces . It can be seen with the naked eye, having an apparent visual magnitude of +4.64.[ 2] Based upon an annual parallax shift of 8.50 mas as seen from Earth,[ 1] it is located about 384 light years from the Sun.
This is an evolved G-type giant star with a stellar classification of G8.5 III.[ 3] There is a 94%[ 6] chance that it is on the horizontal branch and is a red clump star,[ 10] which means it is generating energy through helium fusion at its core. Chi Piscium is estimated to have 3.17 times the mass of the Sun , nearly 21 times the solar radius , and shines with 209 times the Sun's luminosity. It is around 380 million years old.[ 6]
Naming
In Chinese , 奎宿 (Kuí Sù ), meaning Legs (asterism) , refers to an asterism consisting of χ Piscium, η Andromedae , 65 Piscium , ζ Andromedae , ε Andromedae , δ Andromedae , π Andromedae , ν Andromedae , μ Andromedae , β Andromedae , σ Piscium , τ Piscium , 91 Piscium , υ Piscium , φ Piscium and ψ¹ Piscium . Consequently, the Chinese name for χ Piscium itself is 奎宿十五 (Kuí Sù shíwǔ , English: the Fifteenth Star of Legs .)[ 11]
References
^ a b c d e f van Leeuwen, F. (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 , S2CID 18759600 .
^ a b c d Argue, A. N. (1966), "UBV photometry of 550 F, G and K type stars", Monthly Notices of the Royal Astronomical Society , 133 (4): 475–493, Bibcode :1966MNRAS.133..475A , doi :10.1093/mnras/133.4.475 .
^ a b Keenan, Philip C.; McNeil, Raymond C. (1989). "The Perkins catalog of revised MK types for the cooler stars". Astrophysical Journal Supplement Series . 71 : 245. Bibcode :1989ApJS...71..245K . doi :10.1086/191373 .
^ 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.
^ Takeda, Yoichi; Sato, Bun'ei; Murata, Daisuke (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 .
^ a b c Reffert, Sabine; et al. (2015), "Precise radial velocities of giant stars. VII. Occurrence rate of giant extrasolar planets as a function of mass and metallicity", Astronomy & Astrophysics , 574 : A116, arXiv :1412.4634 , Bibcode :2015A&A...574A.116R , doi :10.1051/0004-6361/201322360 , S2CID 59334290 . Values are for the slightly higher probability horizontal branch model fit.
^ Bernacca, P. L.; Perinotto, M. (1970), "A catalogue of stellar rotational velocities", Contributi Osservatorio Astronomico di Padova in Asiago , 239 (1): 1, Bibcode :1970CoAsi.239....1B .
^ "chi Psc" . SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2017-07-23 .{{cite web }}
: CS1 maint: postscript (link )
^ 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 . {{citation }}
: CS1 maint: unflagged free DOI (link )
^ Valentini, M.; Munari, U. (November 2010), "A spectroscopic survey of faint, high-Galactic-latitude red clump stars. I. The high resolution sample", Astronomy and Astrophysics , 522 : A79, arXiv :1007.0207 , Bibcode :2010A&A...522A..79V , doi :10.1051/0004-6361/201014870 , S2CID 119156545 .
^ (in Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 19 日