Star in the constellation Piscis Austrinus
Tau Piscis Austrini (τ Piscis Austrini ) is a solitary,[ 9] yellow-white hued star in the southern constellation of Piscis Austrinus . It is visible to the naked eye with an apparent visual magnitude of +4.9.[ 2] Based upon an annual parallax shift of 54.71 mas as seen from the Earth,[ 1] the star is located 59.6 light years from the Sun .
This is an F-type main sequence star with a stellar classification of F6 V.[ 3] It is about 1.3[ 7] billion years old with a projected rotational velocity of 14[ 4] km/s and exhibits a low level of activity .[ 10] The star has an estimated 1.34 times the mass of the Sun and 1.45 times the Sun's radius .[ 5] It is radiating 2.82[ 5] times the solar luminosity from its photosphere at an effective temperature of 6,324 K.[ 4] This star is a candidate for hosting a debris disk , as it displayed an initial near infrared excess that faded with further observations.[ 11]
In Chinese , 天錢 (Tiān Qián ), meaning Celestial Money , refers to an asterism consisting of refers to an asterism consisting of τ Piscis Austrini, 13 Piscis Austrini , θ Piscis Austrini , ι Piscis Austrini and μ Piscis Austrini . Consequently, the Chinese name for τ Piscis Austrini itself is 天錢五 (Tiān Qián wǔ , English: the Fifth Star of Celestial Money .)[ 12]
^ 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 Gutierrez-Moreno, Adelina; et al. (1966), "A System of photometric standards", Publications of the Department of Astronomy University of Chile , 1 , Publicaciones Universidad de Chile, Department de Astronomy: 1–17, Bibcode :1966PDAUC...1....1G .
^ a b Gray, R. O.; et al. (July 2006), "Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample", The Astronomical Journal , 132 (1): 161–170, arXiv :astro-ph/0603770 , Bibcode :2006AJ....132..161G , doi :10.1086/504637 , S2CID 119476992 .
^ a b c d e Ammler-von Eiff, Matthias; Reiners, Ansgar (June 2012), "New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?", Astronomy & Astrophysics , 542 : A116, arXiv :1204.2459 , Bibcode :2012A&A...542A.116A , doi :10.1051/0004-6361/201118724 , S2CID 53666672 .
^ a b c d e Bruntt, H.; et al. (July 2010), "Accurate fundamental parameters for 23 bright solar-type stars", Monthly Notices of the Royal Astronomical Society , 405 (3): 1907–1923, arXiv :1002.4268 , Bibcode :2010MNRAS.405.1907B , doi :10.1111/j.1365-2966.2010.16575.x , S2CID 118495267 .
^ a b Maldonado, J.; et al. (July 2015), "Searching for signatures of planet formation in stars with circumstellar debris discs", Astronomy & Astrophysics , 579 : 41, arXiv :1502.07100 , Bibcode :2015A&A...579A..20M , doi :10.1051/0004-6361/201525764 , S2CID 118434947 , A20.
^ a b Holmberg, J.; et al. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", Astronomy and Astrophysics , 501 (3): 941–947, arXiv :0811.3982 , Bibcode :2009A&A...501..941H , doi :10.1051/0004-6361/200811191 , S2CID 118577511 .
^ "tau PsA -- High proper-motion Star" , SIMBAD Astronomical Database , Centre de Données astronomiques de Strasbourg, retrieved 2017-05-17 .
^ 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 .
^ Meunier, N.; et al. (September 2012), "Comparison of different exoplanet mass detection limit methods using a sample of main-sequence intermediate-type stars", Astronomy & Astrophysics , 545 : 16, arXiv :1207.4329 , Bibcode :2012A&A...545A..87M , doi :10.1051/0004-6361/201219163 , S2CID 59138448 , A87.
^ Ertel, S.; et al. (October 2016), "A near-infrared interferometric survey of debris-disc stars. V. PIONIER search for variability", Astronomy & Astrophysics , 595 : 6, arXiv :1608.05731 , Bibcode :2016A&A...595A..44E , doi :10.1051/0004-6361/201527721 , S2CID 7277663 , A44.
^ (in Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 5 日