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.[1] It was discovered in 2011, and was the first L-dwarf discovered in the field of view of the Kepler space telescope.[2]
.gif) Artist's conception of WISEP J190648.47+401106.8 | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Lyra |
| Right ascension | 19h 06m 48.075s[1] |
| Declination | +40° 11′ 08.59″[1] |
| Characteristics | |
| Spectral type | L1[2] |
| Apparent magnitude (J) | 13.078±0.024[3] |
| Apparent magnitude (H) | 12.260±0.023[3] |
| Apparent magnitude (K) | 11.771±0.018[3] |
| Astrometry | |
| Proper motion (μ) | RA: 438.293 mas/yr[1] Dec.: -179.712 mas/yr[1] |
| Parallax (π) | 59.6710 ± 0.1047 mas[1] |
| Distance | 54.66 ± 0.10 ly (16.76 ± 0.03 pc) |
| Details[4] | |
| Radius | 0.92±0.07 RJup |
| Luminosity (bolometric) | 0.0002 L☉ |
| Temperature | 2300±75 K |
| Rotation | 0.37015 d (8.9 hr) |
| Rotational velocity (v sin i) | 11.2±2.2 km/s |
| Database references | |
| SIMBAD | data |
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.[5]
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.[6][7]
References
edit- ^ a b c d e 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.
- ^ a b 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.
- ^ a b c "WISEP J190648.47+401106.8". SIMBAD. 26 November 2015. Retrieved 11 December 2015.
- ^ 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.
- ^ "NASA Telescopes Detect Jupiter-Like Storm on Small Star". Jet Propulsion Laboratory. 10 December 2015. Retrieved 11 December 2015.
- ^ Wall, Mike (3 June 2013). "Dwarf Star Blasts out Stunningly Powerful Flares". Space.com. Retrieved 11 December 2015.
- ^ 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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