OTS 44
Observation data J2000.0
| |
---|---|
Constellation | Chamaeleon |
Right ascension | 11h 10m 11.5s |
Declination | −76° 32′ 13″ |
Characteristics | |
Spectral type | M9.5[1] |
Details | |
Mass | 0.011[2] M☉ |
Radius | 0.23[1]–0.57[3] R☉ |
Luminosity | 0.0013[1]–0.0024[3] L☉ |
Temperature | 1,700[2][3]–2,300[1] K |
Database references | |
SIMBAD | data |
OTS 44 is a
free-floating planetary-mass object or brown dwarf located at 550 light-years (170 pc) in the constellation Chamaeleon near the reflection nebula IC 2631. It is among the lowest-mass free-floating substellar objects, with approximately 11.5 times the mass of Jupiter, or approximately 1.1% that of the Sun.[2][4]
Its radius is not very well known and is estimated to be 23–57% that of the Sun.[1][3]
OTS 44 was discovered in 1998 by Oasa, Tamura, and Sugitani as a member of the star-forming region Chamaeleon I.[5][6] Based upon infrared observations with the Spitzer Space Telescope and the Herschel Space Observatory, OTS 44 emits an excess of infrared radiation for an object of its type, suggesting it has a circumstellar disk of dust and particles of rock and ice.[1][3][7] This disk (gas+dust) has a SED-fitted mass of at about 30 Earth masses.[3] Observations with the SINFONI spectrograph at the Very Large Telescope show that the disk is accreting matter at the rate of approximately 10−11 of the mass of the Sun per year.
See also
- SCR 1845-6357, a binary system comprising a red dwarf and a brown dwarf
- Cha 110913-773444, an astronomical object that may be a free-floating planet surrounded by what appears to be a protoplanetary disk
References
- ^ S2CID 15340083
- ^ S2CID 53064211.
- ^ S2CID 118456052.
- S2CID 18157277.
- PMID 9804541.
- doi:10.1086/307964.
- ^ "Blurring the lines between stars and planets: Lonely planets offer clues to star formation". MPIA Science Release 2013-09. Retrieved 1 September 2014.
- S2CID 73605838.