astro.wikisort.org - Star

Search / Calendar

109 Virginis is a single,[9] white-hued star in the zodiac constellation of Virgo, located some 134.5 light years away from the Sun. It is the seventh-brightest member of this constellation, having an apparent visual magnitude of +3.72.[2]

109 Virginis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Virgo
Right ascension 14h 46m 14.92536s[1]
Declination +01° 53′ 34.3845″[1]
Apparent magnitude (V) +3.72[2]
Characteristics
Spectral type A0 V[3]
B−V color index −0.005±0.006[4]
Variable type None[5]
Astrometry
Radial velocity (Rv)−6.1±2.7[4] km/s
Proper motion (μ) RA: −114.03[1] mas/yr
Dec.: −22.13[1] mas/yr
Parallax (π)24.25 ± 0.18 mas[1]
Distance134.5 ± 1.0 ly
(41.2 ± 0.3 pc)
Details
Mass2.58±0.02[6] M☉
Radius2.7[7] R☉
Luminosity62.8+1.8
−1.7[6] L☉
Surface gravity (log g)3.83±0.12[8] cgs
Temperature9683+112
−111[6] K
Metallicity [Fe/H]−0.41±0.14[8] dex
Rotational velocity (v sin i)285[6] km/s
Age320[9] Myr
Other designations
109 Vir, BD+02°2862, FK5 547, HD 130109, HIP 72220, HR 5511, SAO 120648[10]
Database references
SIMBADdata

This is an A-type main-sequence star with a stellar classification of A0 V,[3] and is a suspected chemically peculiar star.[6][11] However, Abt and Morrell (1995) gave it a class of A0 IIInn,[12] matching a giant star with "nebulous" lines. It is spinning rapidly with a projected rotational velocity of 285 km/s,[6] which is giving the star an oblate shape with an equatorial bulge that is an estimated 31% larger that the polar radius.[13] The star is 320[9] million years old with 2.58[6] times the mass of the Sun and about 2.7[7] times the Sun's radius. It is radiating 63[6] times the Sun's luminosity from its photosphere at an effective temperature of 9,683 K.[6]


References


  1. 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.
  2. Malagnini, M. L.; Morossi, C. (November 1990), "Accurate absolute luminosities, effective temperatures, radii, masses and surface gravities for a selected sample of field stars", Astronomy and Astrophysics Supplement Series, 85 (3): 1015–1019, Bibcode:1990A&AS...85.1015M.
  3. Cowley, A.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal, 74: 375–406, Bibcode:1969AJ.....74..375C, doi:10.1086/110819
  4. 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.
  5. Adelman, Saul J. (November 1997), "On the possible variability of the main sequence A stars theta Virginis and 109 Virginis", Astronomy and Astrophysics Supplement Series, 125 (3): 497–499, Bibcode:1997A&AS..125..497A, doi:10.1051/aas:1997105.
  6. Zorec, J.; Royer, F. (January 2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691, S2CID 55586789.
  7. Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics (Third ed.), 367: 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754.
  8. Wu, Yue; et al. (January 2011), "Coudé-feed stellar spectral library - atmospheric parameters", Astronomy and Astrophysics, 525: A71, arXiv:1009.1491, Bibcode:2011A&A...525A..71W, doi:10.1051/0004-6361/201015014, S2CID 53480665.
  9. De Rosa, R. J.; et al. (2014), "The VAST Survey - III. The multiplicity of A-type stars within 75 pc", Monthly Notices of the Royal Astronomical Society, 437 (2): 1216–1240, arXiv:1311.7141, Bibcode:2014MNRAS.437.1216D, doi:10.1093/mnras/stt1932, S2CID 88503488.
  10. "109 Vir". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-02-13.
  11. Renson, P.; Manfroid, J. (May 2009), "Catalogue of Ap, HgMn and Am stars", Astronomy and Astrophysics, 498 (3): 961–966, Bibcode:2009A&A...498..961R, doi:10.1051/0004-6361/200810788.
  12. Abt, Helmut A.; Morrell, Nidia I. (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.
  13. Belle, G. T. (2012), "Interferometric observations of rapidly rotating stars", The Astronomy and Astrophysics Review, 20 (1): 51, arXiv:1204.2572, Bibcode:2012A&ARv..20...51V, doi:10.1007/s00159-012-0051-2, S2CID 119273474.

На других языках

- [en] 109 Virginis

[es] 109 Virginis

109 Virginis (109 Vir / HD 130109 / HR 5511)[1] es una estrella en la constelación de Virgo situada cerca del límite con Serpens. Aún careciendo de denominación de Bayer es la séptima estrella más brillante de su constelación, con magnitud aparente +3,71. Se encuentra a 129 años luz del Sistema Solar.


Текст в блоке "Читать" взят с сайта "Википедия" и доступен по лицензии Creative Commons Attribution-ShareAlike; в отдельных случаях могут действовать дополнительные условия.

Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.

2019-2025
WikiSort.org - проект по пересортировке и дополнению контента Википедии