Astronomy:WISE J1147−2040
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| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Hydra |
| Right ascension | 11h 47m 24.214s[1] |
| Declination | −20° 40′ 20.44″[1] |
| Characteristics | |
| Evolutionary stage | Brown dwarf or a rogue planet |
| Spectral type | L7V[1] |
| Astrometry | |
| Distance | 102 ± 12 ly (31.3 ± 3.8[2] pc) |
| Details | |
| Mass | 5–10[3] MJup |
| Temperature | 1500 ± 100[2] K 1100–1200[2] K |
| Age | 7±2.5[4] Myr |
| Other designations | |
WISEA 1147, 2MASS J11472421−2040204, WISEA J114724.10−204021.3 | |
| Database references | |
| SIMBAD | data |
WISEA J114724.10−204021.3 (abbreviated WISEA 1147) is a brown dwarf in the TW Hydrae association, a nearby group of very young stars and brown dwarfs.[5][6] The object is notable because its estimate mass, 6±1 times the mass of Jupiter, places it in the mass range for rogue planets.[7] Nevertheless, it is a free-floating object, unassociated with any star system.[8]
The object was discovered using information from NASA's WISE (Wide-field Infrared Survey Explorer) and the 2MASS (Two Micron All-Sky Survey). Researchers inferred the young age for WISEA 1147 because it is a member of a group of stars that is only 10 million years old, and they estimated its mass using evolutionary models for brown dwarf cooling.
References
- ↑ 1.0 1.1 1.2 "2MASS J11472421-2040204". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=2MASS+J11472421-2040204.
- ↑ 2.0 2.1 2.2 Schneider, Adam C.; Windsor, James; Cushing, Michael C.; Kirkpatrick, J. Davy; Wright, Edward L. (2016). "Wisea J114724.10-204021.3: A Free-Floating Planetary Mass Member of the Tw Hya Association". The Astrophysical Journal 822 (1): L1. doi:10.3847/2041-8205/822/1/L1. Bibcode: 2016ApJ...822L...1S.
- ↑ "NASA spots free-floating brown dwarf in deep space". MSN. 22 April 2016. https://www.msn.com/en-gb/money/technology/nasa-spots-free-floating-brown-dwarf-in-deep-space/ar-BBs6ozz.
- ↑ Vos, Johanna M.; Biller, Beth A.; Allers, Katelyn N.; Faherty, Jacqueline K.; Liu, Michael C.; Metchev, Stanimir; Eriksson, Simon; Manjavacas, Elena et al. (2020). "Spitzer Variability Properties of Low-gravity L Dwarfs". The Astronomical Journal 160 (1): 38. doi:10.3847/1538-3881/ab9642. Bibcode: 2020AJ....160...38V.
- ↑ "Lone Planetary-Mass Object Found in Family of Stars". NASA. 19 April 2016. http://www.nasa.gov/feature/jpl/lone-planetary-mass-object-found-in-family-of-stars. Retrieved 21 April 2016.
- ↑ Kennell, Joanne. "Astronomers Spot a Lonely Planet-Like Object Floating Freely in Space". The Science Explorer. http://thescienceexplorer.com/universe/astronomers-spot-lonely-planet-object-floating-freely-space. Retrieved 21 April 2016.
- ↑ Best, William M. J.; Liu, Michael C.; Dupuy, Trent J.; Magnier, Eugene A. (2017). "The Young L Dwarf 2MASS J11193254−1137466 Is a Planetary-mass Binary". The Astrophysical Journal 843 (1): L4. doi:10.3847/2041-8213/aa76df. ISSN 2041-8213. Bibcode: 2017ApJ...843L...4B.
- ↑ Newcomb, Alyssa (20 April 2016). "Lonely Planet Unattached to a Star Found in Deep Space". ABC News. https://abcnews.go.com/Technology/lonely-planet-unattached-star-found-deep-space/story?id=38542912. Retrieved 21 April 2016.
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