ULAS J133553.45+113005.2
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Virgo |
| Right ascension | 13h 35m 53.45s[1] |
| Declination | +11° 30′ 05.2″[1] |
| Characteristics | |
| Spectral type | T9[1] |
| Astrometry | |
| Distance | 26–40[2] ly (8–12[2] pc) |
| Details | |
| Mass | 0.014–0.030[2] M☉ |
| Temperature | 500–550[3] K |
| Age | 0.6–5.3[2] Gyr |
| Database references | |
| SIMBAD | data |
ULAS J133553.45+113005.2 (also called ULAS1335) is a T-type brown dwarf in the constellation of Virgo.[1] It was discovered in data from the UK Infrared Telescope (UKIRT) Infrared Deep Sky Survey (UKIDSS) Large Area Survey (LAS). Its discovery was reported June 2008.[2]
After identification, ULAS1335 was imaged using the UFTI camera on the UKIRT, on Mauna Kea, Hawaii, to confirm its photometric properties and location. It was spectroscopically confirmed as a T9 dwarf using the Gemini North telescope, also at Mauna Kea, and was imaged using IRAC on the Spitzer Space Telescope. The IRAC imaging confirmed it as the reddest (in near-to-mid-infrared colors) T dwarf yet discovered, and by inference the coolest.[2]
ULAS1334 was initially estimated to have a temperature around 550–600 K, a distance of 8–12 parsecs (26–39 light-years), and a mass of 15–31 Jupiter masses.[2] More recent spectroscopic observations, using IRS on the Spitzer Space Telescope, give an effective temperature of 500–550 K.[3] Since these temperature estimates are based on model comparisons, they should be treated with caution until the parallax of this object has been measured.[2]
References
[edit | edit source]- ^ a b c d ULAS J133553.45+113005.2 -- Brown Dwarf (M<0.08solMass), database entry, SIMBAD. Accessed on line June 24, 2009.
- ^ a b c d e f g h Exploring the substellar temperature regime down to ~550K, Ben Burningham et al., Monthly Notices of the Royal Astronomical Society 391, #1 (November 2008), pp. 320–333, Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value)., Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).. The arXiv e-print of this paper, Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value)., was first submitted June 2, 2008.
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
