WISEPA J132233.66-234017.1
Observation data Epoch MJD 55579.11[1] Equinox J2000[1] | |
---|---|
Constellation | Template:Constel |
Right ascension | 13h 22m 33.63s[1] |
Declination | −23° 40′ 16.71″[1] |
Characteristics | |
Spectral type | T8[1][2] |
Apparent magnitude (J (2MASS filter system)) | 17.006 ± 0.105[1] |
Apparent magnitude (H (2MASS filter system)) | 16.605 ± 0.141[1] |
Apparent magnitude (KS (2MASS filter system)) | 16.991 ± 0.399[1] |
Astrometry | |
Proper motion (μ) | RA: -299 ± 204[1] mas/yr Dec.: 158 ± 225[1] mas/yr |
Distance | ~ 33.9[2] ly (~ 10.4[2] pc) |
Other designations | |
WISEPA J132233.66-234017.1 (designation abbreviated to WISE 1322-2340, or WISE J1322-2340) is a brown dwarf of spectral class T8,[1][2] located in constellation Template:Constel at approximately 34 light-years from Earth.[2]
Discovery
WISE 1322-2340 was discovered in 2011 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. WISE 1322-2340 has two discovery papers: Gelino et al. (2011) and Kirkpatrick et al. (2011).[3][1] Gelino et al. examined for binarity nine brown dwarfs using Laser Guide Star Adaptive Optics system (LGS-AO) on Keck II telescope on Mauna Kea; seven of these nine brown dwarfs were also newfound, including WISE 1322-2340. These observations had indicated that two of these nine brown dwarfs are binary, but the other seven, including WISE 1322-2340, are single brown dwarfs. Kirkpatrick et al. presented discovery of 98 new found by WISE brown dwarf systems with components of spectral types M, L, T and Y, among which also was WISE 1322-2340.[1][note 1]
Distance
Trigonometric parallax of WISE 1322-2340 is not yet measured. Therefore, there are only distance estimates of this object, obtained by indirect — spectrofotometric — means (see table).
WISE 1322-2340 distance estimates
Source | Parallax, mas | Distance, pc | Distance, ly | Ref. |
---|---|---|---|---|
Kirkpatrick et al. (2011) | ~11.9 | ~38.8 | [1] | |
Kirkpatrick et al. (2012) | ~10.4 | ~33.9 | [2] |
Non-trigonometric distance estimates are marked in italic.
See also
The other eight objects, checked for binarity by Gelino et al. (2011) on Keck II:[3]
- binarity found:
- WISE 0458+6434 (T8.5 + T9.5, component A discovered before by Mainzer et al. (2011)[4])
- WISE 1841+7000 (T5 + T5, newfound)
- binarity not found:
- WISE 0750+2725 (T8.5, newfound[note 2])
- WISE 1614+1739 (T9, newfound)
- WISE 1617+1807 (T8, discovered before by Burgasser et al. (2011)[5])
- WISE 1627+3255 (T6, newfound)
- WISE 1653+4444 (T8, newfound)
- WISE 1741+2553 (T9, newfound)
Notes
- ^ These 98 brown dwarf systems are only among first, not all brown dwarf systems, discovered from data, collected by WISE: six discoveries were published earlier (however, also listed in Kirkpatrick et al. (2011)) in Mainzer et al. (2011) and Burgasser et al. (2011), and the other discoveries were published later.
- ^ Presented in Gelino et al. (2011), but this is not mentioned in Kirkpatrick et al. (2011) and Kirkpatrick et al. (2012) — according these two articles, the only discovery paper of WISE 0750+2725 is Kirkpatrick et al. (2011).
References
- ^ a b c d e f g h i j k l m n o p Attention: This template ({{cite doi}}) is deprecated. To cite the publication identified by doi:10.1088/0067-0049/197/2/19, please use {{cite journal}} (if it was published in a bona fide academic journal, otherwise {{cite report}} with
|doi=10.1088/0067-0049/197/2/19
instead. - ^ a b c d e f Attention: This template ({{cite doi}}) is deprecated. To cite the publication identified by doi:10.1088/0004-637X/753/2/156, please use {{cite journal}} (if it was published in a bona fide academic journal, otherwise {{cite report}} with
|doi=10.1088/0004-637X/753/2/156
instead. - ^ a b Attention: This template ({{cite doi}}) is deprecated. To cite the publication identified by doi:10.1088/0004-6256/142/2/57, please use {{cite journal}} (if it was published in a bona fide academic journal, otherwise {{cite report}} with
|doi=10.1088/0004-6256/142/2/57
instead. - ^ Attention: This template ({{cite doi}}) is deprecated. To cite the publication identified by doi:10.1088/0004-637X/726/1/30, please use {{cite journal}} (if it was published in a bona fide academic journal, otherwise {{cite report}} with
|doi=10.1088/0004-637X/726/1/30
instead. - ^ Attention: This template ({{cite doi}}) is deprecated. To cite the publication identified by doi:10.1088/0004-637X/735/2/116, please use {{cite journal}} (if it was published in a bona fide academic journal, otherwise {{cite report}} with
|doi=10.1088/0004-637X/735/2/116
instead.