Psi Velorum
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Vela |
Right ascension | 09h 30m 41.99958s[1] |
Declination | −40° 28′ 00.2616″[1] |
Apparent magnitude (V) | +3.58[2] (3.91 + 5.12)[3] |
Characteristics | |
Spectral type | F0 IV + F3 IV[4] |
U−B color index | +0.00[2] |
B−V color index | +0.36[2] |
Astrometry | |
Radial velocity (Rv) | +8.8±1.8[5] km/s |
Proper motion ( | RA: −147.98[1] mas/yr Dec.: +61.35[1] mas/yr |
Parallax ( | 53.15 ± 0.37 mas[1] |
Distance | 61.4 ± 0.4 ly (18.8 ± 0.1 pc) |
Absolute magnitude (MV) | 2.56[6] |
Orbit[7] | |
Period (P) | 33.95 yr |
Semi-major axis (a) | 0.862″ |
Eccentricity (e) | 0.433 |
Inclination (i) | 58.0° |
Longitude of the node ( | 291.0° |
Periastron epoch (T) | 1969.68 |
Argument of periastron ( (secondary) | 44.3° |
Details | |
Mass | 1.44[8] M☉ |
Radius | 2.216[9] R☉ |
Luminosity | 9.661[9] L☉ |
Surface gravity (log g) | 4.27[8] cgs |
Temperature | 7,122±242[8] K |
Metallicity [Fe/H] | 0.0±0.2[4] dex |
Rotational velocity (v sin i) | 156.0[10] km/s |
Age | 889[8] Myr |
Other designations | |
Database references | |
SIMBAD | |
ARICNS | |
Psi Velorum, Latinized from
The two components of this system orbit their common barycenter with a period of 33.95 years and an eccentricity of 0.433. The semimajor axis of their orbit has an angular size of 0.862 arc seconds.[7] The primary, component A, is a yellow-white hued F-type subgiant with an apparent magnitude of +3.91[3] and a stellar classification of F0 IV.[4] The fainter secondary, component B, is also an F-type subgiant of magnitude +5.12[3] and class F3 IV.[4] It has been reported to be variable between magnitude 4.5 and 5.1.[13]
References
[edit]- ^ a b c d e van 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.
- ^ a b c d Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data, SIMBAD, Bibcode:1986EgUBV........0M.
- ^ a b c Malkov, O. Yu.; et al. (2012), "Dynamical Masses of a Selected Sample of Orbital Binaries", Astronomy & Astrophysics, 546: 5, Bibcode:2012A&A...546A..69M, doi:10.1051/0004-6361/201219774, A69.
- ^ a b c d Heiter, U.; et al. (2015), "Gaia FGK benchmark stars: Effective temperatures and surface gravities", Astronomy & Astrophysics, 582: A49, arXiv:1506.06095, Bibcode:2015A&A...582A..49H, doi:10.1051/0004-6361/201526319, S2CID 53391939.
- ^ de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, S2CID 59451347, A61.
- ^ Just, A.; Jahrei, H. (October 2008), "The main sequence from F to K stars of the solar neighbourhood in SDSS colours", Astronomische Nachrichten, 329 (8): 790, arXiv:0808.2111, Bibcode:2008AN....329..790J, doi:10.1002/asna.200811030, S2CID 18793369.
- ^ a b Hartkopf, W. I.; et al. (2006), Sixth Catalog of Orbits of Visual Binary Stars, archived from the original on 2011-05-17, retrieved 2017-04-03
- ^ a b c d David, 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.
- ^ a b Schofield, Mathew; Chaplin, William J.; Huber, Daniel; Campante, Tiago L.; Davies, Guy R.; Miglio, Andrea; Ball, Warrick H.; Appourchaux, Thierry; Basu, Sarbani; Bedding, Timothy R.; Christensen-Dalsgaard, Jørgen; Creevey, Orlagh; García, Rafael A.; Handberg, Rasmus; Kawaler, Steven D. (2019-03-01), "The Asteroseismic Target List for Solar-like Oscillators Observed in 2 minute Cadence with the Transiting Exoplanet Survey Satellite", The Astrophysical Journal Supplement Series, 241 (1): 12, arXiv:1901.10148, Bibcode:2019ApJS..241...12S, doi:10.3847/1538-4365/ab04f5, ISSN 0067-0049 psi Velorum's database entry at VizieR.
- ^ Schröder, C.; Reiners, Ansgar; Schmitt, Jürgen H. M. M. (January 2009), "Ca II HK emission in rapidly rotating stars. Evidence for an onset of the solar-type dynamo" (PDF), Astronomy and Astrophysics, 493 (3): 1099–1107, Bibcode:2009A&A...493.1099S, doi:10.1051/0004-6361:200810377[permanent dead link]
- ^ "* psi Vel". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-03-31.
{{cite web}}
: CS1 maint: postscript (link) - ^ Nakajima, Tadashi; et al. (September 2010), "Potential Members of Stellar Kinematical Groups within 20 pc of the Sun", The Astronomical Journal, 140 (3): 713–722, Bibcode:2010AJ....140..713N, doi:10.1088/0004-6256/140/3/713.
- ^ Samus, N. N.; Durlevich, O. V.; et al. (2009), "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)", VizieR On-line Data Catalog: B/gcvs, 1, Bibcode:2009yCat....102025S.