SZ Piscium
| Observation data Epoch J2000.0 Equinox J2000.0 | ||
|---|---|---|
| Constellation | Pisces | |
| Right ascension | 23h 13m 23.778s[2] | |
| Declination | 02° 40′ 31.60″[2] | |
| Apparent magnitude (V) | 7.18[3] | |
| Characteristics | ||
| Spectral type | K1IV + F8V + ?[4] | |
| Variable type | ||
Semi-amplitude (K1)(primary) | 74.2 km/s | |
| Semi-amplitude (K2) (secondary) | 103.98 km/s | |
| Details | ||
| K star | ||
Rotational velocity (v sin i) | 67.7±1.0[4] km/s | |
| Database references | ||
| SIMBAD | data | |
SZ Piscium is a suspected
The variability of this star was reported by
subgiant in close orbit with an F8V main sequence star.[11] In 1972, H. L. Atkins and D. S. Hall included it on a list of RS Canum Venaticorum type variable systems and showed it has an infrared excess.[12]
magnetic activity.[4]
Significant
star spot activity was found all over the K-type star, with variations in the total spot coverage observed over time.[6] It is estimated to be filling 85% of its Roche lobe due to the gravitational influence of the secondary. The rotation period of this star is several times slower than its orbital period, while the rotation of the F-type star is synchronous.[4] Changes in radial velocity of the system over time suggest it is a triple star system,[6] with the tertiary component having ~90% of the mass of the Sun and an orbital period of 1,283±10 days.[4]
References
- S2CID 120020249. Retrieved 24 June 2022.
- ^ .
- ^ S2CID 125853869.
- ^ .
- S2CID 15290475.
- ^ S2CID 14758154.
- ^ "SZ Psc", SIMBAD, Centre de données astronomiques de Strasbourg, retrieved 2022-03-21.
- ^ doi:10.1086/111880.
- S2CID 120782775.
- doi:10.1086/146155.
- doi:10.1086/107661.
- S2CID 121175598.
- S2CID 120698419.
Further reading
- Cao, Dongtao; et al. (June 2020), "Further Investigation on Chromospheric and Prominence Activity of the RS Canum Venaticorum Star SZ Piscium", The Astronomical Journal, 159 (6): 15, S2CID 219969221, 292.
- Cao, Dongtao; et al. (January 2019), "Prominence activation, optical flare, and post-flare loops on the RS Canum Venaticorum star SZ Piscium", Monthly Notices of the Royal Astronomical Society, 482 (1): 988–998, .
- Drake, S. A.; et al. (2015), "The Swift Detection of a Large Flare from the RS CVn Binary SZ Psc", GRB Coordinates Network, Circular Service, vol. 17304, no. 1, p. 1, Bibcode:2015GCN.17304....1D.
- Cao, Dong-Tao; Gu, Sheng-Hong (February 2012), "New observations of chromospheric and prominence activity on the RS CVn-type binary SZ Piscium", Astronomy & Astrophysics, 538: 4, S2CID 119931636, A130.
- Negoro, H.; et al. (November 2011), "MAXI/GSC detection of a possible flare from the RS CVn type star SZ Psc", The Astronomer's Telegram, 3737: 1, Bibcode:2011ATel.3737....1N.
- Wang, Xiao-Liang; et al. (June 2010), "Orbital Period Change of the Eclipsing Binary System SZ Piscium", Publications of the Astronomical Society of Japan, 62 (3): 671–674, .
- Zhang, L. -Y.; Gu, S. -H. (August 2008), "Chromospheric activity on the RS Canum Venaticorum binary SZ Piscium", Astronomy and Astrophysics, 487 (2): 709–716, .
- Lanza, A. F.; et al. (September 2001), "Long-term starspot evolution, activity cycle and orbital period variation of SZ Piscium", Astronomy and Astrophysics, 376 (3): 1011–1030, .
- Antonopoulou, E.; et al. (November 1995), "Photoelectric Observations of SZ Psc During 1993-1994", Information Bulletin on Variable Stars, 4262 (1): 1, Bibcode:1995IBVS.4262....1A.
- Kalimeris, A.; et al. (January 1995), "An orbital period study of SZ Piscium", Astronomy and Astrophysics, 293: 371–376, Bibcode:1995A&A...293..371K.
- Doyle, J. G.; et al. (November 1994), "Surface inhomogeneities on SZ Piscium", Astronomy and Astrophysics, 291: 135–142, Bibcode:1994A&A...291..135D.
- Doyle, J. G.; et al. (March 1994), "Ultraviolet flare activity on the eclipsing binary SZ Piscium", Astronomy and Astrophysics, 283: 522–524, Bibcode:1994A&A...283..522D.
- Danezis, E.; et al. (January 1992), "The Ultraviolet Spectrum of the Binary System Sz-Piscium", Astrophysics and Space Science, 187 (2): 307–318, S2CID 189850636.
- Thompson, K. (December 1987), "Photometric Observations on SZ Psc", Information Bulletin on Variable Stars, 3119 (1): 1, Bibcode:1987IBVS.3119....1T.
- Bakos, Gustav; Tremko, Josef (November 1987), "The Light Curve Analysis of SZ PISCIUM", Bulletin of the Astronomical Institute of Czechoslovakia, 38: 356, Bibcode:1987BAICz..38..356B.
- Scaltriti, F.; et al. (December 1985), "Some Comments on the Minima of the RS CVn Type Eclipsing Binaries CQ Aur, RU Cnc, VV Mon and SZ Psc", Information Bulletin on Variable Stars, 2841 (1): 1, Bibcode:1985IBVS.2841....1S.
- Percy, J. R. (June 1985), "A note on two RS Canum Venaticorum stars : LX Persei and SZ Piscium", Journal of the Royal Astronomical Society of Canada, 79: 113–118, Bibcode:1985JRASC..79..113P.
- Antonopoulou, E.; Williams, P. M. (June 1984), "Infrared photometry of the RS CVn binaries. IV. SZ Piscium", Astronomy and Astrophysics, 135: 61–65, Bibcode:1984A&A...135...61A.
- Huenemoerder, D. P.; Ramsey, L. W. (April 1984), "Hydrogen-alpha observations of RS Canum Venaticorum stars. III. The eclipsing systems AR Lacertae and SZ Piscium", Astronomical Journal, 89: 549–558, doi:10.1086/113547.
- Tumer, O.; et al. (February 1980), "B V Light Curves of SZ Psc", Information Bulletin on Variable Stars, 1741 (1): 1, Bibcode:1980IBVS.1741....1T.
- Okazaki, Akira (February 1979), "Photoelectric Observations of SZ Piscium", Information Bulletin on Variable Stars, 1560 (1): 1, Bibcode:1979IBVS.1560....1O.
- Catalano, S.; et al. (May 1978), "The Orbital Period Variation of SZ Psc", Information Bulletin on Variable Stars, 1427 (1): 1, Bibcode:1978IBVS.1427....1C.
- Eaton, J. A. (July 1977), "Further Light Curve Variations of SZ Piscium", Information Bulletin on Variable Stars, 1297 (1): 1, Bibcode:1977IBVS.1297....1E.
- Jensch, A. (August 1934), "Ergebnisse photographischer und visueller Beobachtungen an 7 Veräderlichen", Astronomische Nachrichten, 252 (24): 393, . As '35.1934 Piscium'.
