TVLM513-46546
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Boötes |
| Right ascension | 15h 01m 08.187s |
| Declination | +22° 50' 02.04"' |
| Characteristics | |
| Spectral type | M8.5V |
| Astrometry | |
| Proper motion (μ) | RA: -55 mas/yr Dec.: -59 mas/yr |
| Parallax (π) | 92.92 ± 0.23[1] mas |
| Distance | 35.10 ± 0.09 ly (10.76 ± 0.03 pc) |
| Details | |
| Mass | 0.09 M☉ |
| Radius | 0.11 R☉ |
| Luminosity | 0.00042 L☉ |
| Temperature | 2,500 K |
| Age | >1 billion years |
| Other designations | |
2MASS J15010818+2250020, 2MASSI J1501081+225001, 2MUCD 20596. | |
| Database references | |
| SIMBAD | data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) | |
TVLM513-46546 is an ultracool brown dwarf in the constellation Boötes, exhibiting a flare star activity and all the same varying semi-regularly due to dissimilarly bright hemispheres and a rotation period of about two days. The star has a mass as low as 90 times the mass of Jupiter (or 9 percent of Sun's mass) and an estimated radius of 11 percent that of Sun (nearly a Jupiter-sized star). The star also shows hints of an unseen companion with undetermined mass. Future monitoring will be able to confirm or rule out low-mass stellar or even planetary mass companions (down to 2-10 Jupiter masses), with orbital periods spanning between 1 and 15 days.[2] Assuming a stellar luminosity of 0.042 percent that of Sun, the habitable zone where an Earth-like planet may retain liquid water at comfortable temperatures would be located within 0.02 Astronomical Units (roughly 10 times the distance of the Moon from Earth).
References
- ↑ Jan Forbrich; Edo Berger; Mark J. Reid (2013). "An Astrometric Search for a Sub-stellar Companion of the M8.5 Dwarf TVLM513–46546 Using Very Long Baseline Interferometry.". arXiv:1307.4117v1.
- ↑ Forbrich; Berger, Edo (2005). "The First VLBI Detection of an Ultracool Dwarf: Implications for the Detectability of Sub-stellar Companions". The Astrophysical Journal Letters 706 (2): 205–209. arXiv:0910.1349. Bibcode:2009ApJ...706L.205F. doi:10.1088/0004-637X/706/2/L205.
- Henry T.J.; McCarthy D.W.Jr. (1993). "The mass-luminosity relation for stars of mass 1.0 to 0.08m.solar.". The Astrophysical Journal 106: 773–789. Bibcode:1993AJ....106..773H. doi:10.1086/116685.
- Martin E.L.; Delfosse X.; Basri G.; Goldman B.; et al. (1999). "Spectroscopic classification of late-M and L field dwarfs.". The Astrophysical Journal 118: 2466–2482. Bibcode:1999AJ....118.2466M. doi:10.1086/301107.
- Reid I.N.; Kirkpatrick J.D.; Liebert J.; Gizis J.E.; et al. (2002). "High-resolution spectroscopy of ultracool M dwarfs.". The Astrophysical Journal 124: 519–540. arXiv:astro-ph/0204285. Bibcode:2002AJ....124..519R. doi:10.1086/340805.
- Golimowski D.A.; Leggett S.K.; Marley M.S.; Fan X.; et al. (2004). "L' and M' photometry of ultracool dwarfs.". The Astrophysical Journal 127: 3516–3536. arXiv:astro-ph/0402475. Bibcode:2004AJ....127.3516G. doi:10.1086/420709.
- HAllinan G.; Antonova A.; Doyle J.G.; Bourke S.; et al. (2006). "Rotational modulation of the radio emission from the M9 dwarf TVLM 513-46546: broadband coherent emission at the substellar boundary?". The Astrophysical Journal 653: 690–699. arXiv:astro-ph/0608556. Bibcode:2006ApJ...653..690H. doi:10.1086/508678.
External links
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