Pi1 Doradus
K-type giant in the constellation Dorado
Pi1 Doradus , Latinized from π1 Doradus , is a solitary star [ 15] located in the southern constellation Dorado near the southwestern border with Mensa . It is faintly visible to the naked eye as an orange-hued point of light with an apparent magnitude of 5.54.[ 2] Gaia DR3 parallax measurements imply a distance of 660 light-years [ 1] and it is currently receding with a heliocentric radial velocity of 15.7 km/s .[ 5] At its current distance, Pi1 Doradus' brightness is diminished by 0.24 magnitudes due to interstellar extinction [ 16] and it has an absolute magnitude of −0.83.[ 6]
Pi1 Doradus has a stellar classification of K5 III,[ 3] indicating that it is an evolved K-type giant star . It has 1.67 times the mass of the Sun but at the age of 2.67 billion years ,[ 7] it has expanded to 56.5 times the radius of the Sun .[ 8] It radiates 530 times the luminosity of the Sun [ 9] from its enlarged photosphere at an effective temperature 4,019 K [ 11] Gaia DR3 stellar evolution models give a larger radius of 63.2 R ☉ and a higher luminosity of 938 L ☉ .[ 1] Pi1 Doradus is metal enriched with an iron abundance of [Fe/H] = +0.10 or 126% that of the Sun 's.[ 10] Like many giant stars it spins slowly—having a projected rotational velocity of 1.8 km/s .[ 12]
References
^ a b c d e f 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.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics . 355 : L27 – L30 . Bibcode :2000A&A...355L..27H . ISSN 0004-6361 . S2CID 17128864 .
^ a b Houk, N.; Cowley, A. P. (1975). University of Michigan Catalogue of two-dimensional spectral types for the HD stars: Declinations −90° to −53° . Vol. 1. Bibcode :1975mcts.book.....H .
^ a b Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory . 4 : 99– 110. Bibcode :1966CoLPL...4...99J .
^ a b Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35,495 Hipparcos stars in a common system". Astronomy Letters . 32 (11): 759– 771. arXiv :1606.08053 . Bibcode :2006AstL...32..759G . doi :10.1134/S1063773706110065 . eISSN 1562-6873 . ISSN 1063-7737 . S2CID 119231169 .
^ a b Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters . 38 (5): 331– 346. arXiv :1108.4971 . Bibcode :2012AstL...38..331A . doi :10.1134/S1063773712050015 . eISSN 1562-6873 . ISSN 1063-7737 . S2CID 119257644 .
^ a b c Bertelli, G.; Bressan, A.; Chiosi, C.; Fagotto, F.; Nasi, E. (August 1994). "Theoretical isochrones from models with new radiative opacities". Astronomy and Astrophysics Supplement Series . 106 : 275– 302. Bibcode :1994A&AS..106..275B . ISSN 0365-0138 . S2CID 122757475 .
^ a b Kervella, P.; Thévenin, F.; Di Folco, E.; Ségransan, D. (April 8, 2004). "The angular sizes of dwarf stars and subgiants: Surface brightness relations calibrated by interferometry" . Astronomy & Astrophysics . 426 (1): 297– 307. arXiv :astro-ph/0404180 . Bibcode :2004A&A...426..297K . doi :10.1051/0004-6361:20035930 . eISSN 1432-0746 . ISSN 0004-6361 .
^ a b 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 .
^ a b c Anders, F.; et al. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18" . Astronomy & Astrophysics . 628 : A94. arXiv :1904.11302 . Bibcode :2019A&A...628A..94A . doi :10.1051/0004-6361/201935765 . eISSN 1432-0746 . ISSN 0004-6361 . S2CID 131780028 .
^ a b Recio-Blanco, A.; de Laverny, P.; Palicio, P. A.; Kordopatis, G.; Álvarez, M. A.; Schultheis, M.; Contursi, G.; Zhao, H.; Torralba Elipe, G.; Ordenovic, C.; Manteiga, M. (16 June 2023). "Gaia Data Release 3. Analysis of RVS spectra using the General Stellar Parametriser from spectroscopy" . Astronomy & Astrophysics . 674 : A29. arXiv :2206.05541 . Bibcode :2023A&A...674A..29R . doi :10.1051/0004-6361/202243750 .
^ a b De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (January 2014). "A catalog of rotational and radial velocities for evolved stars V: Southern stars *" . Astronomy & Astrophysics . 561 : A126. arXiv :1312.3474 . Bibcode :2014A&A...561A.126D . doi :10.1051/0004-6361/201220762 . eISSN 1432-0746 . ISSN 0004-6361 . S2CID 54046583 .
^ Gould, Benjamin Apthorp (1878). "Uranometria Argentina : brillantez y posicion de las estrellas fijas, hasta la septima magnitud, comprendidas dentro de cien grados del polo austral : con atlas". Resultados del Observatorio Nacional Argentino . 1 . Bibcode :1879RNAO....1.....G .
^ "* pi.01 Dor" . SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved September 28, 2023 .
^ Eggleton, P. P.; Tokovinin, A. A. (11 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 . eISSN 1365-2966 . ISSN 0035-8711 . S2CID 14878976 .
^ Gontcharov, George A.; Mosenkov, Aleksandr V. (28 September 2017). "Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars" . Monthly Notices of the Royal Astronomical Society . 472 (4): 3805– 3820. arXiv :1709.01160 . Bibcode :2017MNRAS.472.3805G . doi :10.1093/mnras/stx2219 . eISSN 1365-2966 . ISSN 0035-8711 . S2CID 118879856 .