TVLM 513-46546

TVLM 513-46546

TVLM 513-46546 (the red dot in the center), as seen by the Sloan Digital Sky Survey.
Observation data
Epoch J2000      Equinox J2000
Constellation Boötes
Right ascension 15h 01m 08.18646s[1]
Declination +22° 50′ 02.1379″[1]
Apparent magnitude (V) 15.09[2]
Characteristics
Evolutionary stage Brown dwarf[3]
Spectral type M9[4]
Astrometry
Proper motion (μ) RA: −43.120±0.111 mas/yr[1]
Dec.: −65.138±0.140 mas/yr[1]
Parallax (π)93.1655 ± 0.1355 mas[1]
Distance35.01 ± 0.05 ly
(10.73 ± 0.02 pc)
Details
Mass0.06–0.08[3][5] M☉
Radius0.097 – 0.109[5] R☉
Luminosity0.00026[5] L☉
Temperature2242±55[6] K
Rotation1.96 h[5]
Rotational velocity (v sin i)60[5] km/s
Age>400[5][4] Myr
Other designations
2MASS J15010818+2250020, 2MASSI J1501081+225001, 2MUCD 20596
Database references
SIMBADdata
Near-infrared light curves for TVLM 513–46546, adapted from Harding et al. (2013)[7]

TVLM 513-46546 is an M9 ultracool dwarf at the red dwarf/brown dwarf mass boundary in the constellation Boötes. It exhibits flare star activity, which is most pronounced at radio wavelengths. The star has a mass approximately 80 times the mass of Jupiter (or 8 percent of the Sun's mass). The radio emission is broadband and highly circularly polarized, similar to planetary auroral radio emissions.[8] The radio emission is periodic, with bursts emitted every 7054 s, with nearly one hundredth of a second precision. Subtle variations in the radio pulses could suggest that the ultracool dwarf rotates faster at the equator than the poles (differential rotation) in a manner similar to the Sun.[9]

  1. ^ a b c d Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  3. ^ a b Gawroński, Marcin P.; Goździewski, Krzysztof; Katarzyński, Krzysztof (2016-12-22). "Physical properties and astrometry of radio-emitting brown dwarf TVLM 513-46546 revisited". Monthly Notices of the Royal Astronomical Society. 466 (4): 4211–4220. arXiv:1612.05656. doi:10.1093/mnras/stw3329. ISSN 0035-8711.
  4. ^ a b Cite error: The named reference Curiel was invoked but never defined (see the help page).
  5. ^ a b c d e f Cite error: The named reference hallinan2008 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference filippazzo was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Harding was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Hallinan was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Wolszczan was invoked but never defined (see the help page).