WISEPA J171104.60+350036.8
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Hercules |
| Right ascension | 17h 11m 04.73s |
| Declination | +35° 00′ 37.63″ |
| Characteristics | |
| Evolutionary stage | brown dwarf |
| Spectral type | T8+T9.5[1] |
| Astrometry | |
| Proper motion (μ) | RA: -157.6 ±0.6 mas/yr[2] Dec.: -76.3 ±0.6 mas/yr[2] |
| Parallax (π) | 43.3 ± 1.9 mas[2] |
| Distance | 75 ± 3 ly (23 ± 1 pc) |
| Details[1] | |
| WISE J1711+3500A | |
| Mass | 19-23 MJ or 44-48 MJup |
| Temperature | 675-870 K |
| WISE J1711+3500B | |
| Mass | 8.1-10.7 MJ or 20-26 MJup |
| Temperature | 420-540 K |
| Position (relative to WISE J1711+3500A)[3] | |
| Component | WISE J1711+3500B |
| Angular distance | 780.0 ±2.0 mas |
| Projected separation | 15.0 ±2.0 AU |
| Other designations | |
** LIM 6, CNS5 4209, WDS J17111+3501AB, WISEA J171104.59+350036.7, WISEP J171104.60+350036.8, WISE J171104.60+350036.8, EQ J1711+3500 | |
| Database references | |
| SIMBAD | data |
WISE J1711+3500 (also known as WISEPA J171104.60+350036.8) is a binary consisting of a brown dwarf and a planetary-mass object or brown dwarf. Both objects are late T dwarfs.[1]
WISE J1711+3500 was discovered in 2011 with the Wide-field Infrared Survey Explorer and with a spectrum from NASA IRTF as a T8 dwarf.[4] In 2012 it was discovered that this object is a binary from imaging with the Keck telescope. The individual spectral types were estimated to be T8 for the primary and T9.5 for the secondary. The pair is separated by 15 ± 2 astronomical units (AU). For an age of 1 billion years the masses are around 19-23 MJ for the primary and around 8.1-10.7 MJ for the secondary. For an age of 5 billion years the masses are around 44-48 MJ for the primary and 20-26 MJ for the secondary. The orbital period was poorly constrained, but is larger than 200 years.[1]
See also
[edit]Other late T to Y dwarf binaries:
- WISE 1217+1626 T9+Y0
- WISE J0336−0143 Y+Y
- CFBDSIR J1458+1013 T9+Y0
- WISE 0146+4234 T9+Y0
- WISE 0226−0211 T8+Y0?
References
[edit]- ^ a b c d Liu, Michael C.; Dupuy, Trent J.; Bowler, Brendan P.; Leggett, S. K.; Best, William M. J. (2012-10-01). "Two Extraordinary Substellar Binaries at the T/Y Transition and the Y-band Fluxes of the Coolest Brown Dwarfs". The Astrophysical Journal. 758 (1): 57. arXiv:1206.4044. Bibcode:2012ApJ...758...57L. doi:10.1088/0004-637X/758/1/57. ISSN 0004-637X.
- ^ a b Kirkpatrick, J. Davy; Gelino, Christopher R.; Faherty, Jacqueline K.; Meisner, Aaron M.; Caselden, Dan; Schneider, Adam C.; Marocco, Federico; Cayago, Alfred J.; Smart, R. L.; Eisenhardt, Peter R.; Kuchner, Marc J.; Wright, Edward L.; Cushing, Michael C.; Allers, Katelyn N.; Bardalez Gagliuffi, Daniella C. (2021-03-01). "The Field Substellar Mass Function Based on the Full-sky 20 pc Census of 525 L, T, and Y Dwarfs". The Astrophysical Journal Supplement Series. 253 (1): 7. arXiv:2011.11616. Bibcode:2021ApJS..253....7K. doi:10.3847/1538-4365/abd107. ISSN 0067-0049.
- ^ Aberasturi, M.; Burgasser, A. J.; Mora, A.; Solano, E.; Martín, E. L.; Reid, I. N.; Looper, D. (2014-12-01). "Constraints on the Binary Properties of Mid- to Late T Dwarfs from Hubble Space Telescope WFC3 Observations". The Astronomical Journal. 148 (6): 129. arXiv:1408.4259. Bibcode:2014AJ....148..129A. doi:10.1088/0004-6256/148/6/129. ISSN 0004-6256.
- ^ Kirkpatrick, J. Davy; Cushing, Michael C.; Gelino, Christopher R.; Griffith, Roger L.; Skrutskie, Michael F.; Marsh, Kenneth A.; Wright, Edward L.; Mainzer, A.; Eisenhardt, Peter R.; McLean, Ian S.; Thompson, Maggie A.; Bauer, James M.; Benford, Dominic J.; Bridge, Carrie R.; Lake, Sean E. (2011-12-01). "The First Hundred Brown Dwarfs Discovered by the Wide-field Infrared Survey Explorer (WISE)". The Astrophysical Journal Supplement Series. 197 (2): 19. arXiv:1108.4677. Bibcode:2011ApJS..197...19K. doi:10.1088/0067-0049/197/2/19. ISSN 0067-0049.