WISE J0304−2705 (WISE J030449.03−270508.3) is a Y-dwarf discovered in 2014.[1]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Fornax |
| Right ascension | 03h 04m 48.95s |
| Declination | −27° 05′ 13.35″ |
| Characteristics | |
| Evolutionary stage | brown dwarf |
| Spectral type | Y0pec[1] |
| Astrometry | |
| Proper motion (μ) | RA: 124.6 ±1.8 mas/yr[2] Dec.: 494.3 ±2.6 mas/yr[2] |
| Parallax (π) | 73.1 ± 2.6 mas[2] |
| Distance | 45 ± 2 ly (13.7 ± 0.5 pc) |
| Details[1] | |
| Mass | 21−31 MJup |
| Surface gravity (log g) | 4.0−5.0 cgs |
| Temperature | 465 ±88[2] K |
| Age | 10 Gyr |
| Other designations | |
CNS5 770, WISEA J030449.04-270508.1, WISE J030449.03-270508.3 | |
| Database references | |
| SIMBAD | data |
The object was first identified from data of the Wide-field Infrared Survey Explorer in 2014. Follow-up observation with Gemini South obtained a spectrum of the object. The spectral type was found to be Y0pec, with pec standing for peculiar. The object shows a Y-band and J-band morphology indicative of sub-solar metallicity. Alternatively the J-band morphology could be explained by high gravity. This might indicate an old age of about 10 Gyr and a mass of 21−31 MJ.[1] A later analysis pointed out that metallicity might not be the only cause for its unusual color.[3]
See also
editReferences
edit- ^ a b c d Pinfield, D. J.; Gromadzki, M.; Leggett, S. K.; Gomes, J.; Lodieu, N.; Kurtev, R.; Day-Jones, A. C.; Ruiz, M. T.; Cook, N. J.; Morley, C. V.; Marley, M. S.; Marocco, F.; Smart, R. L.; Jones, H. R. A.; Lucas, P. W. (2014-10-01). "Discovery of a new Y dwarf: WISE J030449.03-270508.3". Monthly Notices of the Royal Astronomical Society. 444 (2): 1931–1939. arXiv:1408.0284. Bibcode:2014MNRAS.444.1931P. doi:10.1093/mnras/stu1540. ISSN 0035-8711.
- ^ a b c 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.
- ^ Kirkpatrick, J. Davy; Martin, Emily C.; Smart, Richard L.; Cayago, Alfred J.; Beichman, Charles A.; Marocco, Federico; Gelino, Christopher R.; Faherty, Jacqueline K.; Cushing, Michael C.; Schneider, Adam C.; Mace, Gregory N.; Tinney, Christopher G.; Wright, Edward L.; Lowrance, Patrick J.; Ingalls, James G. (2019-02-01). "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): 19. arXiv:1812.01208. Bibcode:2019ApJS..240...19K. doi:10.3847/1538-4365/aaf6af. ISSN 0067-0049.