WZ Columbae
Star in the constellation of Columba
WZ Columbae , also known as HD 38170 , is a solitary,[19] bluish-white hued star located in the southern constellation Columba , the dove. It has an apparent magnitude of 5.28,[3] allowing it to be faintly visible to the naked eye . Based on parallax measurements from the Gaia spacecraft , the object is about 365 light years distant.[2] It appears to be receding from the Solar System , having a heliocentric radial velocity of 36.3 km/s .[9]
WZ Columbae was originally listed as a slowly pulsating B-type star by the General Catalogue of Variable Stars . However, observations from Hempel & Howlger (2003) reveal it to be overabundant in strontium and barium .[14] Combined with Hipparcos photometry, this led to the object being reclassified as an Alpha2 Canum Venaticorum variable .[8] Based on data collected in the Hipparcos passband , it fluctuates between magnitudes 5.27 and 5.29 over 1.38 days .[7] [20] However, TESS data suggests a period of 2.76618± 0.00004 days; double that of the earlier data.[16]
The stellar classification of WZ Columbae is B9/9.5 V[5] — a main-sequence star with the characteristics of a B9 and B9.5 star. It has 3.07[4] times the mass of the Sun and is estimated to be 394 million years old,[16] having completed 89.2% of its main sequence lifetime.[4] It has a slightly enlarged radius of 3.47 R ☉ [11] and an effective temperature of 10,000 K .[4] This yields a luminosity 124 times that of the Sun [12] from its photosphere . Like most chemically peculiar stars , WZ Columbae has a relatively slow projected rotational velocity at 65 km/s .[15]
References
^ "MAST: Barbara A. Mikulski Archive for Space Telescopes" . Space Telescope Science Institute. Retrieved 15 September 2022 .
^ a b c d e 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 .
^ a b c d e f Zorec, J.; Royer, F. (January 2012). "Rotational velocities of A-type stars" . Astronomy & Astrophysics . 537 : A120. arXiv :1201.2052 . Bibcode :2012A&A...537A.120Z . doi :10.1051/0004-6361/201117691 . eISSN 1432-0746 . ISSN 0004-6361 .
^ a b Houk, N. (1982). Michigan Catalogue of Two-dimensional Spectral Types for the HD stars III: Declinations −40° to −26° . Bibcode :1982mcts.book.....H .
^ Stoy, R. H. (1968). "Photoelectric Magnitudes and Colours for Bright Southern Stars". Monthly Notes of the Astronomical Society of South Africa . 27 : 119. Bibcode :1968MNSSA..27..119S . ISSN 0024-8266 .
^ a b Samus’, N. N.; Kazarovets, E. V.; Durlevich, O. V.; Kireeva, N. N.; Pastukhova, E. N. (January 2017). "General catalogue of variable stars: Version GCVS 5.1". Astronomy Reports . 61 (1): 80–88. Bibcode :2017ARep...61...80S . doi :10.1134/S1063772917010085 . eISSN 1562-6881 . ISSN 1063-7729 . S2CID 125853869 .
^ a b Dubath, P.; Rimoldini, L.; Süveges, M.; Blomme, J.; López, M.; Sarro, L. M.; De Ridder, J.; Cuypers, J.; Guy, L.; Lecoeur, I.; Nienartowicz, K.; Jan, A.; Beck, M.; Mowlavi, N.; De Cat, P.; Lebzelter, T.; Eyer, L. (9 May 2011). "Random forest automated supervised classification of Hipparcos periodic variable stars" . Monthly Notices of the Royal Astronomical Society . 414 (3): 2602–2617. arXiv :1101.2406 . Bibcode :2011MNRAS.414.2602D . doi :10.1111/j.1365-2966.2011.18575.x . ISSN 0035-8711 .
^ 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 .
^ 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 Kervella, Pierre; Arenou, Frédéric; Thévenin, Frédéric (2022). "Stellar and substellar companions from Gaia EDR3" . Astronomy & Astrophysics . 657 : A7. arXiv :2109.10912 . Bibcode :2022A&A...657A...7K . doi :10.1051/0004-6361/202142146 . eISSN 1432-0746 . ISSN 0004-6361 .
^ a b McDonald, I.; Zijlstra, A. A.; Watson, R. A. (15 June 2017). "Fundamental parameters and infrared excesses of Tycho–Gaia stars" . Monthly Notices of the Royal Astronomical Society . 471 (1): 770–791. arXiv :1706.02208 . Bibcode :2017MNRAS.471..770M . doi :10.1093/mnras/stx1433 . eISSN 1365-2966 . ISSN 0035-8711 .
^ Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List" . The Astronomical Journal . 158 (4): 138. arXiv :1905.10694 . Bibcode :2019AJ....158..138S . doi :10.3847/1538-3881/ab3467 . eISSN 1538-3881 .
^ a b Hempel, M.; Holweger, H. (September 2003). "Abundance analysis of late B stars" . Astronomy & Astrophysics . 408 (3): 1065–1076. Bibcode :2003A&A...408.1065H . doi :10.1051/0004-6361:20030889 . eISSN 1432-0746 . ISSN 0004-6361 .
^ a b Royer, F.; Gerbaldi, M.; Faraggiana, R.; Gómez, A. E. (January 2002). "Rotational velocities of A-type stars" . Astronomy & Astrophysics . 381 (1): 105–121. arXiv :astro-ph/0110490 . Bibcode :2002A&A...381..105R . doi :10.1051/0004-6361:20011422 . eISSN 1432-0746 . ISSN 0004-6361 .
^ a b c David-Uraz, A; Shultz, M E; Petit, V; Bowman, D M; Erba, C; Fine, R A; Neiner, C; Pablo, H; Sikora, J; ud-Doula, A; Wade, G A (1 April 2021). "MOBSTER – IV. Detection of a new magnetic B-type star from follow-up spectropolarimetric observations of photometrically selected candidates★" . Monthly Notices of the Royal Astronomical Society . 504 (4): 4841–4849. arXiv :2004.09698 . Bibcode :2021MNRAS.504.4841D . doi :10.1093/mnras/stab899 . eISSN 1365-2966 . ISSN 0035-8711 .
^ 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 .
^ "WZ Columbae" . SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved September 7, 2022 .
^ 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 .
^ "WZ Col" . The International Variable Star Index . American Association of Variable Star Observers. Retrieved 2022-09-16 .