2MASS J09373487 + 2931409
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Brown dwarf 2MASS J09373487 + 2931409 |
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| Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| Constellation | lion | ||
| Right ascension | 09 h 37 m 34.9 s | ||
| declination | + 29 ° 31 ′ 41 ″ | ||
| parallax | (163.39 ± 1.76) mas | ||
| distance | 20 ± 0.2 ly (6.12 ± 0.07 pc ) |
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| Proper movement | |||
| Rec. Share: | (+944.15 ± 1.24) mas / a | ||
| Dec. portion: | (−1319.78 ± 1.21) mas / a | ||
| Typing | |||
| Spectral class | T6p | ||
| Physical Properties | |||
| Effective temperature | approx. 780 to 840 K. | ||
| Other names and catalog entries |
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2MASS J09373487 + 2931409 is a T6 dwarf in the constellation Leo . It shows an unusual spectrum that indicates a metal-poor atmosphere and / or high surface acceleration (high pressure on the surface). By measuring the parallax in the infrared, its distance could be determined to be about 20 light years. Its effective temperature is estimated to be around 800 Kelvin.
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- Burgasser et al .: The Spectra of T Dwarfs. I. Near-Infrared Data and Spectral Classification ; in: The Astrophysical Journal , Vol. 564, Issue 1, pp. 421ff. (2002), bibcode : 2002ApJ ... 564..421B
- Burgasser et al .: A Method for Determining the Physical Properties of the Coldest Known Brown Dwarfs ; in: The Astrophysical Journal, Vol. 639, Issue 2, pp. 1095ff. (2006), bibcode : 2006ApJ ... 639.1095B
- Cushing et al .: A Spitzer Infrared Spectrograph Spectral Sequence of M, L, and T Dwarfs ; in: The Astrophysical Journal, Vol. 648, Issue 1, pp. 614ff. (2006), bibcode : 2006ApJ ... 648..614C
- Schilbach et al .: Trigonometric parallaxes of ten ultracool subdwarfs ; in: Astronomy and Astrophysics, Vol. 493, Issue 2, pp. L27-L30 (2009), bibcode : 2009A & A ... 493L..27S