GU Piscium

Last updated
GU Piscium
GUPscLightCurve.png
A visual band light curve for GU Piscium, plotted from ASAS-SN data
Observation data
Epoch J2000.0       Equinox J2000.0
Constellation Pisces
Right ascension 01h 12m 35.0519s [1]
Declination 17° 03′ 55.5712″ [1]
Apparent magnitude  (V)12.96 - 13.24
Characteristics
Spectral type M3 [2]
Astrometry
Radial velocity (Rv)−1.5±0.5 [3] km/s
Proper motion (μ)RA: 96.642±0.127 [1] mas/yr
Dec.: −100.704±0.107 [1] mas/yr
Parallax (π)21.0019±0.0721  mas [1]
Distance 155.3 ± 0.5  ly
(47.6 ± 0.2  pc)
Details
Radius 0.54±0.04 [4]   R☉
Surface gravity (log g)4.75±0.07 [4]   cgs
Temperature 3250±32 [4]   K
Metallicity −0.25±0.19 [4]
Rotational velocity (v sin i)23.7±2.2 [3]  km/s
Other designations
1SWASP J011235.03+170355.7, 1RXS J011235.6+170401, GU Psc, 2MASS J01123504+1703557 [5]
Database references
SIMBAD data

GU Piscium is a star in the constellation Pisces. [5] An RS Canum Venaticorum variable, it ranges from magnitude 12.96 to 13.24 over 1.04 days. [6] It is 48 Parsecs (155 light-years) distant from Earth. [7] This star is also believed to be a member of the AB Doradus moving group with a membership probability of 96.9%. [8]

Planetary system

In 2014, it was found to have a gas giant planet—GU Piscium b—orbiting it. [7]

The GU Piscium planetary system
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(years)		 Eccentricity Inclination Radius
b 9–13  MJ 2000————

References

  1. 1 2 3 4 5 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. ↑ Riaz, Basmah; Gizis, John E.; Harvin, James (2006). "Identification of New M Dwarfs in the Solar Neighborhood". The Astronomical Journal. 132 (2): 866–872. arXiv: astro-ph/0606617 . Bibcode:2006AJ....132..866R. doi:10.1086/505632. S2CID   6282011.
  3. 1 2 Malo, Lison; et al. (2014). "BANYAN. III. Radial Velocity, Rotation, and X-Ray Emission of Low-mass Star Candidates in Nearby Young Kinematic Groups". The Astrophysical Journal. 788 (1). 81. arXiv: 1402.6053 . Bibcode:2014ApJ...788...81M. doi:10.1088/0004-637X/788/1/81. S2CID   119276883.
  4. 1 2 3 4 Malo, Lison; et al. (2014). "BANYAN. IV. Fundamental Parameters of Low-mass Star Candidates in Nearby Young Stellar Kinematic Groups—Isochronal Age Determination using Magnetic Evolutionary Models". The Astrophysical Journal. 792 (1). 37. arXiv: 1406.6750 . Bibcode:2014ApJ...792...37M. doi:10.1088/0004-637X/792/1/37. S2CID   96438831.
  5. 1 2 "V* GU Psc". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2018-10-06.
  6. ↑ BSJ (11 November 2011). "GU Piscium". AAVSO Website. American Association of Variable Star Observers . Retrieved 5 July 2014.
  7. 1 2 Naud, Marie-Eve; et al. (2014). "Discovery of a Wide Planetary-Mass Companion to the Young M3 Star Gu Psc". The Astrophysical Journal. 787 (1). 5. arXiv: 1405.2932 . Bibcode:2014ApJ...787....5N. doi:10.1088/0004-637X/787/1/5. S2CID   35264096.
  8. ↑ Malo, Lison; et al. (2013). "Bayesian Analysis to Identify New Star Candidates in Nearby Young Stellar Kinematic Groups". The Astrophysical Journal. 762 (2). 88. arXiv: 1209.2077 . Bibcode:2013ApJ...762...88M. doi:10.1088/0004-637X/762/2/88. S2CID   118497872.
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.