WISE J073444.02−715744.0 (designation abbreviated to WISE 0734−7157) is a brown dwarf of spectral class Y0,[1] located in constellation Volans at approximately 43 light-years from Earth.[2] It is one of the furthest Y0 brown dwarfs known.
| Observation data Epoch J2000[1] Equinox J2000[1] | |
|---|---|
| Constellation | Volans |
| Right ascension | 07h 34m 44.02s[1] |
| Declination | −71° 57′ 44″[1] |
| Characteristics | |
| Spectral type | Y0[1] |
| Apparent magnitude (J (MKO-NIR filter system)) | 20.41 ± 0.27[1] |
| Astrometry | |
| Proper motion (μ) | RA: −565.5 ± 1.3 mas/yr Dec.: −78.9 ± 1.3 mas/yr |
| Parallax (π) | 75.0 ± 2.4 mas[2] |
| Distance | 43 ± 1 ly (13.3 ± 0.4 pc) |
| Other designations | |
| Database references | |
| SIMBAD | data |
Discovery edit
WISE 0734−7157 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 0734−7157.[1]
Distance edit
Currently the most accurate distance estimate of WISE 0734−7157 is a trigonometric parallax, published in 2019 by Kirkpatrick et al.: 13.3+0.4
−0.4 pc, or 43.5+1.4
−1.3 ly.[2]
See also edit
The other six discoveries of brown dwarfs, published in Kirkpatrick et al. (2012):[1]
- WISE 0146+4234 (Y0)
- WISE 0350−5658 (Y1)
- WISE 0359−5401 (Y0)
- WISE 0535−7500 (≥Y1)
- WISE 0713−2917 (Y0)
- WISE 2220−3628 (Y0)
Lists:
References edit
- ^ a b c d e f g h i j k Kirkpatrick, J. Davy; Gelino, Christopher R.; Cushing, Michael C.; Mace, Gregory N.; Griffith, Roger L.; Skrutskie, Michael F.; Marsh, Kenneth A.; Wright, Edward L.; Eisenhardt, Peter R.; McLean, Ian S.; Mainzer, Amy K.; Burgasser, Adam J.; Tinney, Chris G.; Parker, Stephen; Salter, Graeme (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 c Kirkpatrick, J. Davy; Martin, Emily C.; Smart, Richard L.; Cayago, Alfred J.; Beichman, Charles A.; Marocco, Federico; et al. (February 2019). "Preliminary Trigonometric Parallaxes of 184 Late-T and Y Dwarfs and an Analysis of the Field Substellar Mass Function into the "Planetary" Mass Regime". The Astrophysical Journal Supplement Series. 240 (2): 69. arXiv:1812.01208. Bibcode:2019ApJS..240...19K. doi:10.3847/1538-4365/aaf6af. 19.