HD 93833
Star in the constellation Sextans
HD 93833 (HR 4233; 73 G. Sextantis ) is a solitary star located in the equatorial constellation Sextans . It is faintly visible to the naked eye as an orange-hued point of light with an apparent magnitude of 5.84.[2] Gaia DR2 parallax measurements imply a distance of 345 light-years [1] and it receding with a heliocentric radial velocity of 40.3 km/s .[6] At its current distance, HD 93833's brightness is diminished by an interstellar extinction of 0.18 magnitudes [14] and it has an absolute magnitude of +0.76.[7]
HD 93833 has a stellar classification of K0 III,[4] indicating that it is an evolved K-type giant star that has exhausted hydrogen at its core and left the main sequence . It is currently a red clump star that is on the horizontal branch —fusing helium at its core.[3] It has 1.4 times the mass of the Sun but at the age of 5.5 billion years ,[8] it has expanded to 10.7 times the radius of the Sun .[9] It radiates 60.4 times the luminosity of the Sun [1] from its photosphere at an effective temperature of 4,675 K .[10] HD 93833 is slightly metal deficient with an iron abundance of [Fe/H] = −0.11 or 77.6% of the Sun 's abundance.[11]
References
^ a b c d e f g 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 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 Laney, C. D.; Joner, M. D.; Pietrzyński, G. (11 November 2011). "A new Large Magellanic Cloud K-band distance from precision measurements of nearby red clump stars" . Monthly Notices of the Royal Astronomical Society . 419 (2): 1637–1641. arXiv :1109.4800 . Bibcode :2012MNRAS.419.1637L . doi :10.1111/j.1365-2966.2011.19826.x . ISSN 0035-8711 . S2CID 117788450 .
^ a b Houk, Nancy; Swift, Carrie (1999). Michigan catalogue of two-dimensional spectral types for the HD Stars . Vol. 5. Bibcode :1999mctd.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 Dotter, Aaron; Chaboyer, Brian; Jevremović, Darko; Kostov, Veselin; Baron, E.; Ferguson, Jason W. (September 2008). "The Dartmouth Stellar Evolution Database" . The Astrophysical Journal Supplement Series . 178 (1): 89–101. arXiv :0804.4473 . Bibcode :2008ApJS..178...89D . doi :10.1086/589654 . eISSN 1538-4365 . ISSN 0067-0049 . S2CID 119290835 .
^ 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 . S2CID 6077801 .
^ a b c Luck, R. Earle (25 August 2015). "Abundances in the Local Region. I. G and K Giants". The Astronomical Journal . 150 (3): 88. arXiv :1507.01466 . Bibcode :2015AJ....150...88L . doi :10.1088/0004-6256/150/3/88 . eISSN 1538-3881 . ISSN 0004-6256 . S2CID 118505114 .
^ a b Brown, Jeffery A.; Sneden, Christopher; Lambert, David L.; Dutchover, Edward Jr. (October 1989). "A search for lithium-rich giant stars" . The Astrophysical Journal Supplement Series . 71 : 293. Bibcode :1989ApJS...71..293B . doi :10.1086/191375 . eISSN 1538-4365 . ISSN 0067-0049 .
^ 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 .
^ "HD 93833" . SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved January 11, 2024 .
^ 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 .