WISE J2209+2711 (WISE J220905.73+271143.9) is a brown dwarf of spectral type Y0:,[1] located in constellation Pegasus at 22 light-years from Earth.[3] Its discovery was published in 2014 by Cushing et al.[1]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Pegasus |
| Right ascension | 22h 09m 05.734s |
| Declination | +27° 11′ 44.00″ |
| Characteristics | |
| Evolutionary stage | brown dwarf |
| Spectral type | Y0[1] |
| Astrometry | |
| Parallax (π) | 161.7 ± 2.0 mas[2] |
| Distance | 20.2 ± 0.2 ly (6.18 ± 0.08 pc) |
| Other designations | |
| Database references | |
| SIMBAD | data |
  WISE J2209+2711 Location of WISE J2209+2711 in the constellation Pegasus | |
Physical properties edit
WISE J2209+2711 is one of a few Y-dwarfs observed with JWST NIRSpec and MIRI. The modelling re-produced the spectrum with an excellent fit using phosphine-free and diabatic models. The excellent fit was achieved with a model that used an effective temperature of 350 K and a surface gravity of 4.0. This corresponds to a 5 MJ object with an age of 800 Myrs.[4]
See also edit
References edit
- ^ a b c d Cushing, Michael C.; Kirkpatrick, J. Davy; Gelino, Christopher R.; Mace, Gregory N.; Skrutskie, Michael F.; Gould, Andrew (2014). "Three New Cool Brown Dwarfs Discovered with the Wide-field Infrared Survey Explorer (WISE) and an Improved Spectrum of the Y0 Dwarf WISE J041022.71+150248.4". The Astronomical Journal. 147 (5): 113. arXiv:1402.1378. Bibcode:2014AJ....147..113C. doi:10.1088/0004-6256/147/5/113. S2CID 5858277.
- ^ 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. (2021). "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. S2CID 227126954.
- ^ Beichman, C.; Gelino, Christopher R.; Kirkpatrick, J. Davy; Cushing, Michael C.; Dodson-Robinson, Sally; Marley, Mark S.; Morley, Caroline V.; Wright, E. L. (2014). "WISE Y Dwarfs As Probes of the Brown Dwarf-Exoplanet Connection". The Astrophysical Journal. 783 (2): 68. arXiv:1401.1194v2. Bibcode:2014ApJ...783...68B. doi:10.1088/0004-637X/783/2/68. S2CID 119302072.
- ^ Leggett, S. K.; Tremblin, Pascal (2024-01-01). "James Webb Space Telescope Spectra of Cold Brown Dwarfs are Well-reproduced by Phosphine-free, Diabatic, ATMO2020++ Models". Research Notes of the American Astronomical Society. 8 (1): 13. Bibcode:2024RNAAS...8...13L. doi:10.3847/2515-5172/ad1b61. ISSN 2515-5172.
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