Beta Pavonis
  | |
| Observation data EpochJ2000EquinoxJ2000 | |
|---|---|
| Constellation | Pavo |
| Right ascension | 20h44m57.49399s[1] |
| Declination | −66° 12′ 11.5708″[1] |
| Apparent magnitude(V) | 3.42[2] |
| Characteristics | |
| Spectral type | A5 IV[3]or A7 III[4] |
| U−Bcolor index | +0.12[5] |
| B−Vcolor index | +0.16[5] |
| Astrometry | |
| Radial velocity(Rv) | +3.7±0.5[6]km/s |
| Proper motion(μ) | RA:−42.67[1]mas/yr Dec.:+9.94[1]mas/yr |
| Parallax(π) | 24.14 ± 0.16mas[1] |
| Distance | 135.1 ± 0.9ly (41.4 ± 0.3pc) |
| Absolute magnitude(MV) | +0.33[2] |
| Details | |
| Mass | 2.51[3]M☉ |
| Radius | 2.3[7]R☉ |
| Luminosity | 66[3]L☉ |
| Surface gravity(logg) | 3.84[8]cgs |
| Temperature | 8,184±278[8]K |
| Rotational velocity(vsini) | 75[3]km/s |
| Age | 305[8]Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Beta Pavonis,Latinisedfrom β Pavonis, is a single,[9]white-huedstarin thesouthernconstellationofPavo.It can be seen with the naked eye, having anapparent visual magnitudeof 3.42.[2]Based upon an annualparallax shiftof 24.14masas seen from Earth, it is located 135light-yearsfrom theSun.It is moving away from the Sun with aradial velocityof +4 km/s.[6]Beta Pavonis is a member of theUrsa Major Moving Group,a set of stars that share a similar motion through space.[10]
Zorec and Royer (2012) list astellar classificationfor this star of A5 IV,[3]indicating it is anevolvingsubgiantstar that has consumed thehydrogenat its core and has begun to expand onto thered giantbranch. However, Houk (1979) listed a more evolved class of A7 III,[4]suggesting it is already agiant star.It has about 2.3[7]times theSun's radiusand 2.51[3]times themass of the Sun.At the estimated age of 305[8]million years, the star still has a relatively high rate of spin, having aprojected rotational velocityof 75 km/s.[3]Beta Pavonis is radiating 66[3]times theSun's luminosityfrom itsphotosphereat aneffective temperatureof about8,184K.[8]
References
[edit]- ^abcdeVan 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.S2CID18759600.Vizier catalog entryArchived2021-05-23 at theWayback Machine
- ^abcAnderson, 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.S2CID119257644.Vizier catalog entryArchived2016-09-20 at theWayback Machine
- ^abcdefghZorec, J.; Royer, F. (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.S2CID55586789.Vizier catalog entryArchived2016-09-20 at theWayback Machine
- ^abHouk, Nancy (1979).Michigan catalogue of two-dimensional spectral types for the HD stars.Vol. 1. Ann Arbor, Michigan: Department of Astronomy, University of Michigan.Bibcode:1978mcts.book.....H.
- ^abMallama, A. (2014). "Sloan Magnitudes for the Brightest Stars".The Journal of the American Association of Variable Star Observers.42(2): 443.Bibcode:2014JAVSO..42..443M.Vizier catalog entryArchived2016-09-20 at theWayback Machine
- ^abGontcharov, G. A. (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.S2CID119231169.
- ^abPasinetti Fracassini, L. E.; et al. (February 2001). "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)".Astronomy and Astrophysics.367(Third ed.): 521–524.arXiv:astro-ph/0012289.Bibcode:2001A&A...367..521P.doi:10.1051/0004-6361:20000451.S2CID425754.
- ^abcdeDavid, 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.S2CID33401607.Vizier catalog entryArchived2022-04-18 at theWayback Machine
- ^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.S2CID14878976.
- ^Chupina, N. V.; et al. (June 2006)."Kinematic structure of the corona of the Ursa Major flow found using proper motions and radial velocities of single stars".Astronomy and Astrophysics.451(3): 909–916.Bibcode:2006A&A...451..909C.doi:10.1051/0004-6361:20054009.
