Teide 1
 Estimated relative size of the planet Jupiter and the brown dwarfs WISE 1828+2650, Gliese 229B, and Teide 1 compared to the Sun and a red dwarf. Credit: MPIA/V. Joergens. | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Taurus |
| Right ascension | 3h 47m 18.0s |
| Declination | +24° 22′ 31″ |
| Apparent magnitude (V) | 17.76[citation needed][dubious – discuss] |
| Characteristics | |
| Spectral type | M8 |
| Astrometry | |
| Parallax (π) | 8.40 mas |
| Distance | 400 ly (120 pc) |
| Absolute magnitude (MV) | 12.38[citation needed][dubious – discuss] |
| Details | |
| Mass | 0.052 M☉ |
| Radius | ~0.1 R☉ |
| Luminosity | 0.0008–0.0005[1] L☉ |
| Surface gravity (log g) | 6.6 cgs |
| Temperature | 2600 ± 150[2] K |
| Age | 0.12 Gyr |
Teide 1 was the first brown dwarf to be verified, in 1995.[3] It is located in the Pleiades open star cluster, approximately 400 light-years (120 pc) from Earth.
The apparent magnitude of this faint object is 17.76, which is so faint that it can only seen in large amateur or bigger telescopes. Its absolute magnitude is 12.38.
This object is more massive than a planet (55 ± 15 MJ),[2] but less massive than a star (0.052 MSun). The radius of the brown dwarf is about that of Jupiter (or one-tenth that of the Sun). Its surface temperature is 2600 ± 150 K,[2] which is about half that of the Sun. Its luminosity is 0.08–0.05% of that of the Sun.[1] Its age is only 120 million years compared to the Sun's age of 4.6 billion years.
This brown dwarf is hot enough to fuse lithium in its core, but not hot enough to fuse hydrogen like the Sun.
References
- ^ a b Brown dwarfs in the Pleiades cluster confirmed by the lithium test
- ^ a b c Mid-IR Observations of the Pleiades Brown Dwarfs Teide 1 & Calar 3 (Leech 2000)
- ^ Rebolo, Rafael (2014), "Teide 1 and the Discovery of Brown Dwarfs", in Joergens, Viki (ed.), 50 Years of Brown Dwarfs - From Prediction to Discovery to Forefront of Research, Astrophysics and Space Science Library, vol. 401, Springer, pp. 25–50, ISBN 978-3-319-01162-2
External links
- Walter Myers (1995). "Teide 1".
- http://www.astro-tom.com/technical_data/magnitude_scale.htm
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