WISEP J060738.65+242953.4
Observation data
Epoch 2010.30[1]      Equinox J2000[1]
Constellation Gemini
Right ascension 06h 07m 38.65s[1]
Declination 24° 29′ 53.5″[1]
Characteristics
Spectral type L8[1]
Apparent magnitude (i) 20.02 ± 0.03[1]
Apparent magnitude (z) 16.94 ± 0.01[1]
Apparent magnitude (J (2MASS filter system)) 14.22 ± 0.03[1]
Apparent magnitude (H (2MASS filter system)) 13.04 ± 0.03[1]
Apparent magnitude (KS (2MASS filter system)) 12.47 ± 0.02[1]
Astrometry
Proper motion (μ) RA: -472.871[2] mas/yr
Dec.: -318.464[2] mas/yr
Parallax (π)138.0616 ± 0.5185 mas[2]
Distance23.62 ± 0.09 ly
(7.24 ± 0.03 pc)
Details[1]
Mass0.03–0.072 M☉
Luminosity10−4.56 ± 0.09 L☉
Temperature1460 ± 90 K
Other designations
WISEP J060738.65+242953.4[1]
W0607+2429[1]
2MASSW J06073908+2429574[1]
2MASS J06073908+2429574[3]
SDSS J060738.79+242954.4[1]
Database references
SIMBADdata

WISEP J060738.65+242953.4 (designation is abbreviated to W0607+2429[1]) is a brown dwarf of spectral class L8,[1] located in the constellation Gemini at approximately 25 light-years from Earth.[1]

Discovery

WISEP J060738.65+242953.4 was discovered in 2012 by Castro & Gizis from data collected by the Wide-field Infrared Survey Explorer (WISE) Earth-orbiting satellite — NASA infrared-wavelength 40 centimetres (16 in) space telescope, whose mission lasted from December 2009 to February 2011. There are also precovery identifications of this object in Two Micron All-Sky Survey (2MASS) data (observation epoch 1998.11) and in the Sloan Digital Sky Survey (SDSS) (DR7) (observation epoch 2006.98).[1] In 2012 Castro & Gizis published a paper in The Astrophysical Journal, where they presented discovery of a newfound WISE L-type brown dwarf WISEP J060738.65+242953.4 (a single discovery, presented in the article).[1]

Distance

Trigonometric parallax of WISEP J060738.65+242953.4 is not yet measured. Therefore, there are only distance estimates of this object, obtained by indirect — spectrophotometric — means (see table).

WISEP J060738.65+242953.4 distance estimates
SourceParallax, masDistance, pcDistance, lyRef.
Castro & Gizis (2012)7.8+1.4
−1.2		25.4+4.6
−3.9		[1]
Gaia EDR3138.06167.24±0.0323.62±0.09[2]

Non-trigonometric distance estimates are marked in italic.

Physical properties

WISEP J060738.65+242953.4 has a temperature of 1460 ± 90 K and bolometric luminosity of 10−4.56 ± 0.09 Solar luminosities (the estimates are based on the object's spectral class (L8)).[4] Mass estimates, determined from this temperature, are from 0.03 (for an assumed age of 0.5 Gyr) to 0.072 (for an assumed age of 10 Gyr) Solar masses, below the hydrogen-burning limit, which implies that WISEP J060738.65+242953.4 is not a true star, but only a substellar object.[4]

While some researchers had claimed that WISEP J060738.65+242953.4 may be viewed from its pole, or may rotate slowly because of its narrow spectral lines, later work demonstrated that both of these claims were unlikely.[5] This latter study estimated that the size of the radio-emitting magnetosphere is approximately 107 m.

See also

References

  1. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 Castro, Philip J.; Gizis, John E. (2012). "Discovery of a Late L Dwarf: WISEP J060738.65+242953.4". The Astrophysical Journal. 746 (1): 3. arXiv:1110.4351. Bibcode:2012ApJ...746....3C. doi:10.1088/0004-637X/746/1/3. S2CID 119271171.
  2. 1 2 3 4 Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  3. ↑ "2MASS J06073908+2429574 -- Infrared source". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2012-12-24.
  4. 1 2 Gizis, John E.; Burgasser, Adam J.; Faherty, Jacqueline K.; Castro, Philip J.; Shara, Michael M. (2011). "WISEP J180026.60+013453.1: A nearby late-L Dwarf near the Galactic Plane". The Astronomical Journal. 142 (5): 171. arXiv:1109.0054. Bibcode:2011AJ....142..171G. doi:10.1088/0004-6256/142/5/171. S2CID 118596629.
  5. ↑ Route, Matthew (July 10, 2017). "Is WISEP J060738.65+242953.4 Really A Magnetically Active, Pole-on L Dwarf?". The Astrophysical Journal. 843 (2): 115. arXiv:1706.03010. Bibcode:2017ApJ...843..115R. doi:10.3847/1538-4357/aa78ab. S2CID 119056418.
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