V830 Tauri

V830 Tauri is a star located 427 light-years (or 131 parsecs) away from the Sun in the constellation Taurus.[6] This star is very young, with an age of only 2 million years,[6][7] compared to the Sun's age, which is 4.6 billion years. The star has an exoplanet orbiting around it.

V830 Tauri
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Taurus
Right ascension  04h 33m 10.033s[1]
Declination +24° 33′ 43.38″[1]
Apparent magnitude (V) 12.08 - 12.37[2]
Characteristics
Evolutionary stage T Tau[3]
Spectral type M0-1[4]
Variable type BY Dra[2]
Astrometry
Radial velocity (Rv)13.45[5] km/s
Proper motion (μ) RA: 7.247[5] mas/yr
Dec.: -21.230[5] mas/yr
Parallax (π)7.6571 ± 0.0409[5] mas
Distance426 ± 2 ly
(130.6 ± 0.7 pc)
Details[3]
Mass1.00±0.05 M☉
Radius2.0±0.2 R☉
Luminosity1.2 L☉
Temperature4,250±50 K
Rotation2.741 days
Rotational velocity (v sin i)30.5±0.5 km/s
Age~2 Myr
Other designations
V830 Tauri, IRAS C04301+2427, 2MASS J04331003+2433433
Database references
SIMBADdata

Characteristics

V830 Tauri is an M-type star.[6] The star has a mass of roughly 1 solar mass, but has a radius of 2 solar radii,[6][7] due to the star's age, which means that it hasn't fully contracted yet to become a main-sequence star. It has a surface temperature of 4,250 K.[6][7] For comparison, the Sun's surface temperature is 5,772 K.

V830 Tauri is a T Tauri star, a pre-main sequence star that has a surrounding disc producing emission lines in its spectrum. It is classified as a weak-lined T Tauri star.[3] It is also classified as a BY Draconis variable, cool stars with starspots and chromospheric activity that vary in brightness as they rotate.[2] The variable period of 2.74 days matches the rotation period.[3]

Planet
Main article: V830 Tauri b

On June 20, 2016, an exoplanet was found via radial velocity.[6][7] It is one of the if not the youngest exoplanet ever found. The exoplanet has a mass of about 0.77 masses of Jupiter and is orbiting 0.057 AU away from its host star with a period of 4.93 d and an inclination of 55°.[6][7]

References
  1. Cutri, R. M.; Skrutskie, M. F.; Van Dyk, S.; Beichman, C. A.; Carpenter, J. M.; Chester, T.; Cambresy, L.; Evans, T.; Fowler, J.; Gizis, J.; Howard, E.; Huchra, J.; Jarrett, T.; Kopan, E. L.; Kirkpatrick, J. D.; Light, R. M.; Marsh, K. A.; McCallon, H.; Schneider, S.; Stiening, R.; Sykes, M.; Weinberg, M.; Wheaton, W. A.; Wheelock, S.; Zacarias, N. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". VizieR On-line Data Catalog: II/246. Originally Published in: 2003yCat.2246....0C. 2246. Bibcode:2003yCat.2246....0C.
  2. 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. Originally Published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
  3. Donati, J. F.; Moutou, C.; Malo, L.; Baruteau, C.; Yu, L.; Hébrard, E.; Hussain, G.; Alencar, S.; Ménard, F.; Bouvier, J.; Petit, P.; Takami, M.; Doyon, R.; Cameron, A. Collier (2016). "A hot Jupiter orbiting a 2-million-year-old solar-mass T Tauri star". Nature. 534 (7609): 662–6. arXiv:1606.06236. Bibcode:2016Natur.534..662D. doi:10.1038/nature18305. PMID 27324847.
  4. Strassmeier, Klaus G. (2009). "Starspots". The Astronomy and Astrophysics Review. 17 (3): 251–308. Bibcode:2009A&ARv..17..251S. doi:10.1007/s00159-009-0020-6.
  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.
  6. "The Extrasolar Planet Encyclopaedia — V830 Tau b". exoplanet.eu. Retrieved 2017-07-30.
  7. "V830 Tau b". exoplanetarchive.ipac.caltech.edu. Retrieved 2017-07-30.
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