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.
| 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 |
| Distance | 426 ± 2 ly (130.6 ± 0.7 pc) |
| Details[3] | |
| Mass | 1.00±0.05 M☉ |
| Radius | 2.0±0.2 R☉ |
| Luminosity | 1.2 L☉ |
| Temperature | 4,250±50 K |
| Rotation | 2.741 days |
| Rotational velocity (v sin i) | 30.5±0.5 km/s |
| Age | ~2 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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
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
- 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.
- 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.
- 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.
- 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.
- 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.
- "The Extrasolar Planet Encyclopaedia — V830 Tau b". exoplanet.eu. Retrieved 2017-07-30.
- "V830 Tau b". exoplanetarchive.ipac.caltech.edu. Retrieved 2017-07-30.