IfA 0230-Z1
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Brown dwarf IfA 0230-Z1 |
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| Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| Constellation | whale | ||
| Right ascension | 02 h 26 m 37.6 s | ||
| declination | + 00 ° 51 ′ 54.7 ″ | ||
| Apparent brightness | J-Band: 18.2 mag | ||
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IfA 0230-Z1 , also cataloged as ULAS J022637.55 + 005154.4 , abbreviated ULAS J0226 + 0051 , is a T dwarf in the constellation of Cetus .
The object was described in a paper published in 2002 by Liu et al. identified as a T dwarf based on data from the IfA Deep Survey.
The apparent magnitude of around 18.2 mag in the J band is very low compared to other known T dwarfs.
Based on the apparent brightness and an estimate of the luminosity via the temperature of the then known T-dwarfs, the discoverers located the object very roughly at a distance of about 50 pc. Matsuoka et al. In a study published in 2011 estimate the distance to be 70 ± 20 pc. This makes IfA 0230-Z1 one of the most distant known T-dwarfs.
literature
- Matsuoka et al .: 1 µm Excess Sources in the UKIDSS. I. Three T Dwarfs in the Sloan Digital Sky Survey Southern Equatorial Stripe ; The Astronomical Journal 142 (2)
- Liu et al .: Discovery of a Methane Dwarf from the IfA Deep Survey ; The Astrophysical Journal 568 (2), pp. L107-L111 (2002), bibcode : 2002ApJ ... 568L.107L