Kappa Piscium
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Pisces |
Right ascension | 23h 26m 55.95586s[1] |
Declination | +01° 15′ 20.1900″[1] |
Apparent magnitude (V) | 4.94[2] |
Characteristics | |
Spectral type | A2 Vp SrCrSi[3] |
U−B color index | −0.03[2] |
B−V color index | +0.04[2] |
Variable type | |
Astrometry | |
Proper motion ( | RA: +86.68[1] mas/yr Dec.: −94.29[1] mas/yr |
Parallax ( | 21.25 ± 0.29 mas[1] |
Distance | 153 ± 2 ly (47.1 ± 0.6 pc) |
Absolute magnitude (MV) | +1.59[5] |
Details[6] | |
Mass | 2.62 M☉ |
Radius | 1.86[7] R☉ |
Luminosity | 30[8] L☉ |
Surface gravity (log g) | 4.46 cgs |
Temperature | 10,961±373 K |
Metallicity [Fe/H] | +0.74[5] dex |
Rotational velocity (v sin i) | 34 km/s |
Age | 157 Myr |
Other designations | |
Database references | |
SIMBAD | data |
Kappa Piscium (
![](https://upload.wikimedia.org/wikipedia/commons/thumb/3/3b/KappaPscLightCurve.png/220px-KappaPscLightCurve.png)
This is an A-type main-sequence star with a stellar classification of A2 Vp SrCrSi.[3] The suffix designation indicates it is a "chemically peculiar" Ap star[7] that displays abnormal abundances of silicon, strontium, and chromium. It is an Alpha2 Canum Venaticorum variable[4] with a weak[7] active magnetic field that causes it to fluctuate by 0.01 to 0.1 in magnitude as it rotates. It shows many lines of uranium, and possibly the rare element holmium in its spectrum. Its uranium and osmium content could have been provided by a nearby supernova.[13] Compared to the Sun, it is deficient in oxygen relative to the magnesium abundance.
This star is a candidate member of the AB Doradus moving group, an association of stars with similar ages that share a common heading through space.[8]
Naming[edit]
In Chinese,
References[edit]
- ^ a b c d e f 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 Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99): 99, Bibcode:1966CoLPL...4...99J.
- ^ a b 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.
- ^ a b c Samus, N. N.; et al. (2017), "General Catalogue of Variable Stars", Astronomy Reports, GCVS 5.1, 61 (1): 80–88, Bibcode:2017ARep...61...80S, doi:10.1134/S1063772917010085, S2CID 125853869.
- ^ a b 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.
- ^ 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 c Glagolevskij, Yu. V.; et al. (October 2006), "Spectroscopic study of the weak magnetic star HD220825-
κ Psc", Astrophysics, 49 (4): 497–505, Bibcode:2006Ap.....49..497G, doi:10.1007/s10511-006-0048-5, S2CID 121612463. - ^ a b McCarthy, Kyle; White, Russel J. (June 2012), "The Sizes of the Nearest Young Stars", The Astronomical Journal, 143 (6): 14, arXiv:1201.6600, Bibcode:2012AJ....143..134M, doi:10.1088/0004-6256/143/6/134, S2CID 118538522, 134.
- ^ "kap Psc". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-07-28.
- ^ 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.
- ^ Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal, 122 (6): 3466–3471, Bibcode:2001AJ....122.3466M, doi:10.1086/323920.
- ^ "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 8 December 2021.
- ^ Jørgensen, Christian K. (March 1, 2005), "Heavy elements synthesized in supernovae and detected in peculiar A-type stars", Noble Gas and High Temperature Chemistry, Structure and Bonding, vol. 73, pp. 199–226, doi:10.1007/3-540-52124-0_4, ISBN 978-3-540-52124-2.
- ^ (in Chinese) AEEA (Activities of Exhibition and Education in Astronomy)
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