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]
 WISE 0146+4234 Credit: NASA/ESA/CSA JWST MIRI | |
| Observation data Epoch J2000[1] Equinox J2000[1] | |
|---|---|
| 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 mas[3] |
| Distance | 60 ± 6 ly (19 ± 2 pc) |
| Other designations | |
| Database references | |
| SIMBAD | data |
Discovery edit
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 edit
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 edit
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 edit
- ^ a b c d e f g h i 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. arXiv:1205.2122. Bibcode:2012ApJ...753..156K. doi:10.1088/0004-637X/753/2/156. S2CID 119279752.
- ^ a b 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. arXiv:1502.04707. Bibcode:2015ApJ...803..102D. doi:10.1088/0004-637X/803/2/102. S2CID 118507808.
- ^ a b c d e 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. arXiv:1704.03573. Bibcode:2017ApJ...842..118L. doi:10.3847/1538-4357/aa6fb5. S2CID 119249195.