Star in the constellation Piscis Austrinus
Beta Piscis Austrini , Latinized from β Piscis Austrini , is catalogued as a binary star [ 5] [ 6] constellation of Piscis Austrinus . It is visible to the naked eye with an apparent visual magnitude of +4.29.[ 2] parallax shift of 22.84 mas as seen from the Earth,[ 1] light years from the Sun . These coordinates are a source of X-ray emission with a luminosity of × 1020 W A-type stars .[ 11]
Oblak (1978) identified this as a triple star system,[ 3] [ 5] [ 6] [ 3] A-type main sequence star with a stellar classification of A1 V.[ 4] [ 8] mass of the Sun and 2.1[ 9] Sun's radius . The star is radiating 37[ 8] solar luminosity from its photosphere at an effective temperature of 9,638 K.[ 9] infrared excess , indicating the presence of an orbiting debris disk . This has an estimated temperature of 188 K, indicating an orbital distance of 12 AU from the host star.[ 9] angular separation of 30.3 arc seconds .[ 5] [ 6]
Beta Piscis Austrini is moving through the Galaxy at a speed of 14.4 km/s relative to the Sun. Its projected Galactic orbit carries it between 23,901 and 28,366 light-years from the center of the Galaxy.[ 12]
With Delta and Zeta it constituted Tien Kang ("heavenly rope") in China .[ 13] [ 14]
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 Nicolet, B. (1978), "Photoelectric photometric Catalogue of homogeneous measurements in the UBV System", Astronomy and Astrophysics Supplement Series , 34 : 1– 49, Bibcode :1978A&AS...34....1N . ^ a b c Oblak, E. (December 1978), "uvbybeta photometry of wide visual double stars with B, A and F spectral type - I.", Astronomy and Astrophysics Supplement Series , 34 : 453– 475, Bibcode :1978A&AS...34..453O . ^ a b c 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 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 . ^ a b c d Rodriguez, David R.; et al. (May 2015), "Stellar multiplicity and debris discs: an unbiased sample", Monthly Notices of the Royal Astronomical Society , 449 (3): 3160– 3170, arXiv :1503.01320 Bibcode :2015MNRAS.449.3160R , doi :10.1093/mnras/stv483 S2CID 119237891 . ^ Gontcharov, G. A. (November 2006), "Pulkovo Compilation of Radial Velocities for 35495 Hipparcos stars in a common system", Astronomy Letters , 32 (11): 759– 771, arXiv :1606.08053 Bibcode :2006AstL...32..759G , doi :10.1134/S1063773706110065 , S2CID 119231169 . ^ a b c d e f g Gerbaldi, M.; et al. (June 1999), "Search for reference A0 dwarf stars: Masses and luminosities revisited with HIPPARCOS parallaxes", Astronomy and Astrophysics Supplement , 137 (2): 273– 292, Bibcode :1999A&AS..137..273G , doi :10.1051/aas:1999248 ^ a b c d e Patel, Rahul I.; et al. (May 2014), "A Sensitive Identification of Warm Debris Disks in the Solar Neighborhood through Precise Calibration of Saturated WISE Photometry", The Astrophysical Journal Supplement Series , 212 (1): 23, arXiv :1403.3435 Bibcode :2014ApJS..212...10P , doi :10.1088/0067-0049/212/1/10 , S2CID 119219094 , 10. ^ "bet PsA -- High proper-motion Star" , SIMBAD Astronomical Database , Centre de Données astronomiques de Strasbourg , retrieved 2017-05-27 .^ Schröder, C.; Schmitt, J. H. M. M. (November 2007), "X-ray emission from A-type stars", Astronomy and Astrophysics , 475 (2): 677– 684, Bibcode :2007A&A...475..677S , doi :10.1051/0004-6361:20077429 ^ 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 . ^ Allen, Richard Hinckley (1963), Star Names — Their Lore and Meaning: Piscis Australis, the Southern Fish , retrieved 2017-05-27 . ^ Tien Kang was possibly derived from 天綱 Tiān Gāng Materials for Making Tents (in Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 6 日 Archived 2011-05-21 at the Wayback Machine .
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