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Xi Virginis

From Wikipedia, the free encyclopedia
Star in the constellation Virgo
ξ Virginis
Location of ξ Virginis (circled)
Observation data
EpochJ2000.0      EquinoxJ2000.0
ConstellationVirgo
Right ascension11h 45m 17.04027s[1]
Declination+08° 15′ 29.2150″[1]
Apparent magnitude (V)4.83[2]
Characteristics
Spectral typeA4 V[3]
U−Bcolor index+0.10[2]
B−Vcolor index+0.17[2]
Astrometry
Radial velocity (Rv)−0.5[4] km/s
Proper motion (μ)RA: +60.08[1]mas/yr
Dec.: −24.50[1]mas/yr
Parallax (π)26.73±0.25 mas[1]
Distance122 ± 1 ly
(37.4 ± 0.3 pc)
Absolute magnitude (MV)+1.98[5]
Details
Mass1.93[6] M
Radius1.5[7] R
Luminosity12.6[8] L
Surface gravity (log g)4.31[6] cgs
Temperature8,172[8] K
Rotational velocity (v sin i)130[3] km/s
Age480[9] Myr
Other designations
2 Virginis,ξ Vir,BD+09°2545,HD 102124,HIP 57328,HR 4515,SAO 119029[10]
Database references
SIMBADdata

Xi Virginis (ξ Vir, ξ Virginis) is a solitary[11]star in thezodiacconstellation ofVirgo. It is bright enough to be seen with the naked eye, having anapparent visual magnitude of 4.83.[2] The distance to this star is about 122 light years, as determined fromparallax readings.[1]

Xi Virginis is anA-type main sequence star with astellar classification of A4 V.[3] It has an estimated age of 480[9] million years and is spinning rapidly with aprojected rotational velocity of 130 km/s.[3] It has about 150%[7] theSun's radius and shines with 12.6[8] times theluminosity of the Sun.

References

[edit]
  1. ^abcdefvan 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.
  2. ^abcdMermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)",Catalogue of Eggen's UBV Data. SIMBAD,Bibcode:1986EgUBV........0M.
  3. ^abcdAbt, Helmut A.; Morrell, Nidia I. (July 1995), "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars",Astrophysical Journal Supplement,99: 135,Bibcode:1995ApJS...99..135A,doi:10.1086/192182.
  4. ^Wilson, R. E. (1953), "General Catalogue of Stellar Radial Velocities",Carnegie Institute Washington D.C. Publication,Bibcode:1953GCRV..C......0W.
  5. ^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.
  6. ^abDavid, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets",The Astrophysical Journal,804 (2): 146,arXiv:1501.03154,Bibcode:2015ApJ...804..146D,doi:10.1088/0004-637X/804/2/146,S2CID 33401607.
  7. ^abPasinetti Fracassini, L. E.; et al. (2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics",Astronomy & Astrophysics,367 (2):521–24,arXiv:astro-ph/0012289,Bibcode:2001A&A...367..521P,doi:10.1051/0004-6361:20000451,S2CID 425754.
  8. ^abcMcDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars",Monthly Notices of the Royal Astronomical Society,427 (1):343–57,arXiv:1208.2037,Bibcode:2012MNRAS.427..343M,doi:10.1111/j.1365-2966.2012.21873.x,S2CID 118665352.
  9. ^abVican, Laura (June 2012), "Age Determination for 346 Nearby Stars in the Herschel DEBRIS Survey",The Astronomical Journal,143 (6): 135,arXiv:1203.1966,Bibcode:2012AJ....143..135V,doi:10.1088/0004-6256/143/6/135,S2CID 118539505.
  10. ^"ksi Vir -- Star",SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved2016-09-08.
  11. ^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.
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