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WISEP J190648.47+401106.8

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Brown dwarf star
WISEP J190648.47+401106.8

Artist's conception of WISEP J190648.47+401106.8
Observation data
Epoch J2000      Equinox J2000
Constellation Lyra
Right ascension 19 06 48.075
Declination +40° 11′ 08.59″
Characteristics
Spectral type L1
Apparent magnitude (J) 13.078±0.024
Apparent magnitude (H) 12.260±0.023
Apparent magnitude (K) 11.771±0.018
Astrometry
Proper motion (μ) RA: 438.293 mas/yr
Dec.: -179.712 mas/yr
Parallax (π)59.6710 ± 0.1047 mas
Distance54.66 ± 0.10 ly
(16.76 ± 0.03 pc)
Details
Radius0.92±0.07 RJup
Luminosity (bolometric)0.0002 L☉
Temperature2300±75 K
Rotation0.37015 d (8.9 hr)
Rotational velocity (v sin i)11.2±2.2 km/s
Database references
SIMBADdata

WISEP J190648.47+401106.8 (abbreviated to W1906+40) is an L-type brown dwarf 54.7 light-years (16.8 parsecs) away in the constellation Lyra. It was discovered in 2011, and was the first L-dwarf discovered in the field of view of the Kepler space telescope.

In 2015 it was shown to have on its surface a storm the size of Jupiter's Great Red Spot. The storm rotates around the star roughly every 9 hours and has lasted since at least 2013, when observations of the storm began.

W1906+40 has an intrinsic brightness of 0.02% that of the Sun, a radius of 0.9 times that of Jupiter, and a surface temperature of 2,300 K. The star emits significant flares.

References

  1. ^ Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  2. ^ Gizis, John; Troup, Nicholas W.; Burgasser, Adam J. (August 2011). "A Very High Proper Motion Star and the First L Dwarf in the Kepler Field". The Astrophysical Journal Letters. 736 (2): L34. arXiv:1106.4526. Bibcode:2011ApJ...736L..34G. doi:10.1088/2041-8205/736/2/L34.
  3. ^ "WISEP J190648.47+401106.8". SIMBAD. 26 November 2015. Retrieved 11 December 2015.
  4. Gizis, John; Burgasser, Adam J.; et al. (December 2013). "Kepler Monitoring of an L Dwarf I. The Photometric Period and White Light Flares". The Astrophysical Journal. 779 (2): 172. arXiv:1310.5940. Bibcode:2013ApJ...779..172G. doi:10.1088/0004-637X/779/2/172.
  5. "NASA Telescopes Detect Jupiter-Like Storm on Small Star". Jet Propulsion Laboratory. 10 December 2015. Retrieved 11 December 2015.
  6. Wall, Mike (3 June 2013). "Dwarf Star Blasts out Stunningly Powerful Flares". Space.com. Retrieved 11 December 2015.
  7. Gizis, John E.; et al. (24 September 2015). "Kepler Monitoring of an L Dwarf II. Clouds with Multiyear Lifetimes". The Astrophysical Journal. 813 (2): 104. arXiv:1509.07186. Bibcode:2015ApJ...813..104G. doi:10.1088/0004-637X/813/2/104. S2CID 17035824.
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