Astronomy:WISE 0146+4234

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Short description: Binary brown dwarf star in the constellation Andromeda

Coordinates: Sky map 01h 46m 56.66s, +42° 34′ 10″

WISE J014656.66+423410.0
Observation data
Equinox J2000.0]] (ICRS)
Constellation Andromeda
Right ascension  01h 46m 56.66s[1]
Declination 42° 34′ 10″[1]
Characteristics
Spectral type T9/Y0[2]
Apparent magnitude (H) 18.71 ± 0.24[1]
Astrometry
Proper motion (μ) RA: −455±4[3] mas/yr
Dec.: −24±4[3] mas/yr
Parallax (π)54 ± 5[3] mas
Distance60 ± 6 ly
(19 ± 2 pc)
Other designations
WISE J014656.66+423410.0,[1]
WISE 0146+4234[1]
Database references
SIMBADdata

WISE J014656.66+423410.0 (designation abbreviated to WISE 0146+4234) is a binary brown dwarf of spectral classes T9 and Y0[2] located in the constellation Andromeda. It is approximately 60 light-years from Earth.[3]

Discovery

WISE 0146+4234 was discovered in 2012 by J. Davy Kirkpatrick et al. from data, collected by Wide-field Infrared Survey Explorer (WISE) Earth-orbiting satellite — NASA infrared-wavelength 40 cm (16 in) space telescope, which mission lasted from December 2009 to February 2011. In 2012 Kirkpatrick et al. published a paper in The Astrophysical Journal, where they presented discovery of seven new found by WISE brown dwarfs of spectral type Y, among which also was WISE 0146+4234.[1]

Distance

The distance of WISE 0146+4234 was initially estimated to be 20 light-years from earth.[1] Later measurements of its stellar parallax showed that it was actually 60 light-years away.[3]

See also

The other six discoveries of brown dwarfs, published in Kirkpatrick et al. (2012):[1]

  • WISE 0350-5658 (Y1)
  • WISE 0359-5401 (Y0)
  • WISE 0535-7500 (≥Y1)
  • WISE 0713-2917 (Y0)
  • WISE 0734-7157 (Y0)
  • WISE 2220-3628 (Y0)

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 Kirkpatrick, J. Davy et al. (2012). "Further Defining Spectral Type "Y" and Exploring the Low-mass End of the Field Brown Dwarf Mass Function". The Astrophysical Journal 753 (2): 156. doi:10.1088/0004-637X/753/2/156. Bibcode: 2012ApJ...753..156K. 
  2. ↑ 2.0 2.1 Dupuy, Trent J. et al. (2015). "Discovery of a Low-luminosity, Tight Substellar Binary at the T/Y Transition". The Astrophysical Journal 803 (2): 102. doi:10.1088/0004-637X/803/2/102. Bibcode: 2015ApJ...803..102D. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 Leggett, Sandy K. et al. (2017). "The Y-type Brown Dwarfs: Estimates of Mass and Age from New Astrometry, Homogenized Photometry, and Near-infrared Spectroscopy". The Astrophysical Journal 842 (2): 118. doi:10.3847/1538-4357/aa6fb5. Bibcode: 2017ApJ...842..118L. 



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