WISEPA J041022.71+150248.5
Brown dwarf in the constellation Taurus
From Wikipedia, the free encyclopedia
WISEPA J041022.71+150248.5 (abbreviated WISE 0410+1502) is a sub-brown dwarf[~ 1] of spectral class Y0,[2][3] located in the constellation Taurus. At approximately 21.6 light-years from Earth,[6] it is the nearest celestial object in Taurus.[8]
| Observation data Epoch MJD 55434.04 Equinox J2000 | |
|---|---|
| Constellation | Taurus[1] |
| Right ascension | 04h 10m 22.79s[2] |
| Declination | +15° 02′ 47.5″[2] |
| Characteristics | |
| Spectral type | Y0V[2][3] |
| Apparent magnitude (J (MKO filter system)) | 19.25±0.5[2] |
| Apparent magnitude (H (MKO filter system)) | 19.05±0.09[2] |
| Astrometry | |
| Proper motion (μ) | RA: 959.87±0.17 mas/yr[4] Dec.: −2218.82±0.18 mas/yr[4] |
| Parallax (π) | 153.01±0.70 mas[4] |
| Distance | 21.32 ± 0.10 ly (6.54 ± 0.03 pc) |
| Details | |
| Mass | 3 (3–9)[5] MJup |
| Radius | 1.22 (1.09–1.22)[5] RJup |
| Surface gravity (log g) | 3.75 (3.75–4.25)[5] cgs |
| Temperature | 451±88[6] K |
| Rotation | 8.0±0.14 h[7] |
| Other designations | |
| WISEPA J041022.71+150248.5[2] WISEP J0410+1502[5] WISE J0410+1502[2] WISE 0410+1502[2] | |
| Database references | |
| SIMBAD | data |
History of observations
Discovery
WISE 0410+1502 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 0410+1502 has two discovery papers: Kirkpatrick et al. (2011) and Cushing et al. (2011), however, basically with the same authors and published nearly simultaneously.[2][5]
- 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 0410+1502.[2][~ 2]
- Cushing et al. presented discovery of seven brown dwarfs—one of T9.5 type, and six of Y-type—first members of the Y spectral class, ever discovered and spectroscopically confirmed, including "archetypal member" of the Y spectral class WISE 1828+2650, and WISE 0410+1502.[5] These seven objects are also the faintest seven of 98 brown dwarfs, presented in Kirkpatrick et al. (2011).[2]
Distance
Currently the most accurate distance estimate of WISE 0410+1502 is a trigonometric parallax, published in 2021 by Kirkpatrick et al.: 151.3±2.0 mas, corresponding to a distance 6.61±0.09 pc, or 21.6±0.3 ly.[6] An outdated parallax by Marsh et al. in 2013 corresponded to an even closer distance of approximately 14 light-years.[9]
Space motion
Physical properties
The object's temperature estimate is 451±88 K.[6] Cushing et al. obtained a low-resolution Magellan/FIRE spectrum[5] and later they obtained a higher quality spectrum with Hubble WFC3, confirming the Y0 spectral type.[11] The fitting of the spectrum with cloudy models produces realistic values and Leggett et al. finds a mass of about 10–15 MJ. The atmosphere is likely in a chemical disequilibrium and a cloud-free disequilibrium model does fit well with the Y- and H-band, but does not fit well with the J-band.[12][13]
See also
Lists:
The other six discoveries of brown dwarfs, published in Cushing et al. (2011):[5]
- WISE 0148-7202 (T9.5)
- WISE 1405+5534 (Y0 (pec?))
- WISE 1541-2250 (Y0.5)
- WISE 1738+2732 (Y0)
- WISE 1828+2650 (>Y2)
- WISE 2056+1459 (Y0)
Notes
- Since its mass estimate 3 (3–9) MJup is below the lower brown dwarf mass limit ~13 MJup, it may be actually a sub-brown dwarf or a rogue planet.
- 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.