WISE 2220−3628
Coordinates: 
22h 20m 55.31s, −36° 28′ 17.4″
| Observation data Epoch J2000[1] Equinox J2000[1] | |
|---|---|
| Constellation | Grus |
| Right ascension | 22h 20m 55.31s[1] |
| Declination | −36° 28′ 17.4″[1] |
| Characteristics | |
| Spectral type | Y0[1] |
| Apparent magnitude (J (MKO-NIR filter system)) | 20.38 ± 0.17[1] |
| Apparent magnitude (H (MKO-NIR filter system)) | 20.81 ± 0.30[1] |
| Astrometry | |
| Distance | ~ 26.4[1] ly (~ 8.1[1] pc) |
| Other designations | |
WISE J222055.31−362817.4 (designation abbreviated to WISE 2220−3628) is a brown dwarf of spectral class Y0,[1] located in constellation Grus at approximately 26 light-years from Earth.[1]
Discovery
WISE 2220−3628 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 2220−3628.[1]
Properties
Y-class dwarfs are among the coldest of all brown dwarfs.[1]
Distance
Trigonometric parallax of WISE 2220−3628 is not yet measured. Therefore, there are only distance estimates of this object, obtained by indirect — spectrofotometric — means (see table).
WISE 2220−3628 distance estimates
| Source | Parallax, mas | Distance, pc | Distance, ly | Ref. |
|---|---|---|---|---|
| Kirkpatrick et al. (2012), Table 8 | 8.1 | 26.4 | [1] |
Non-trigonometric distance estimates are marked in italic.
See also
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 0734−7157 (Y0)
References
- 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Kirkpatrick, J. D.; Gelino, C. R.; Cushing, M. C.; Mace, G. N.; Griffith, R. L.; Skrutskie, M. F.; Marsh, K. A.; Wright, E. L.; Eisenhardt, P. R.; McLean, I. S.; Mainzer, A. K.; Burgasser, A. J.; Tinney, C. G.; Parker, S.; Salter, G. (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.
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| ||||||||||||||||||||||||||||||
This article is issued from Wikipedia - version of the Thursday, September 24, 2015. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.