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WISE J035000.32−565830.2

WISE 0350−5658Location of WISE 0350−5658 in the constellation Reticulum
Observation data Epoch J2000      Equinox J2000
Constellation	Reticulum
Right ascension	03 50 00.32
Declination	−56° 58′ 30.2″
Characteristics
Spectral type	Y1
Apparent magnitude (J (MKO-NIR filter system))	>22.8
Apparent magnitude (H (MKO-NIR filter system))	>21.5
Astrometry
Proper motion (μ)	RA: −208.7±1.0 mas/yr Dec.: −575.4±1.1 mas/yr
Parallax (π)	176.4 ± 2.3 mas
Distance	18.5 ± 0.2 ly (5.67 ± 0.07 pc)
Details
Temperature	388±88 K
Other designations
WISE J035000.32−565830.2, WISE 0350−5658
Database references
SIMBAD	data

WISE J035000.32−565830.2 (designation abbreviated to WISE 0350−5658) is a (sub-)brown dwarf of spectral class Y1, located in constellation Reticulum, the nearest known star/brown dwarf in this constellation. Being approximately 18.5 light-years from Earth, it is one of the Sun's nearest neighbors.

Discovery

WISE 0350−5658 was discovered in 2012 by J. Davy Kirkpatrick and colleagues from data collected by the Wide-field Infrared Survey Explorer (WISE) in the infrared at a wavelength of 40 cm (16 in), whose mission lasted from December 2009 to February 2011. In 2012, Kirkpatrick et al. published a paper in The Astrophysical Journal, where they presented the discovery of seven new brown dwarfs of spectral type Y that had been found by WISE, among which was WISE 0350−5658.

Distance

WISE 0350−5658 is one of the nearest known brown dwarfs: its trigonometric parallax is 0.184 ± 0.010 arcsecond, corresponding to a direct distance of 5.4 pc (17.7 ly).

Physical properties

WISE 0350−5658 was observed together with WISEP J1738+2732 with the Gemini Observatory. The researchers found that non-equilibrium chemistry models reproduce the spectra of these two brown dwarfs better than equilibrium models. The researchers also found an effective temperature of 350±25 K and surface gravity of log g=4.0±0.25 for WISE 0350−5658. A mass of 7−9 M_J was estimated in this work. Later work using the Spitzer Space Telescope and J-band photometry found that WISE 0350−5658 has a low tangential velocity, could be metal-rich and also found a similar mass of 3−8 M_J. These properties could be an indicator that it is a young Y-dwarf. Another work using Hubble found a slightly higher mass of 7−13 M_J.

See also

• List of nearest stars and brown dwarfs
• List of Y-dwarfs

The other six discoveries of brown dwarfs, published in Kirkpatrick et al. (2012):

• WISE 0146+4234 (Y0)
• WISE 0359−5401 (Y0)
• WISE 0535−7500 (≥Y1)
• WISE 0713−2917 (Y0)
• WISE 0734−7157 (Y0)
• WISE 2220−3628 (Y0)

References

1. ^ Kirkpatrick, J. Davy; et al. (2012). "Further Defining Spectral Type "Y" and Exploring the Low-mass End of the Field Brown Dwarf Mass Function". The Astrophysical Journal. 753 (2). 156. arXiv:1205.2122. Bibcode:2012ApJ...753..156K. doi:10.1088/0004-637X/753/2/156. S2CID 119279752.
2. ^ 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.
3. Leggett, S. K.; et al. (2017). "The Y-type Brown Dwarfs: Estimates of Mass and Age from New Astrometry, Homogenized Photometry, and Near-infrared Spectroscopy". The Astrophysical Journal. 842 (2). 118. arXiv:1704.03573. Bibcode:2017ApJ...842..118L. doi:10.3847/1538-4357/aa6fb5. S2CID 119249195.
4. Leggett, S. K.; Tremblin, P.; Saumon, D.; Marley, M. S.; Morley, Caroline V.; Amundsen, D. S.; Baraffe, I.; Chabrier, G. (2016-06-01). "Near-infrared Spectroscopy of the Y0 WISEP J173835.52+273258.9 and the Y1 WISE J035000.32-565830.2: The Importance of Non-equilibrium Chemistry". The Astrophysical Journal. 824 (1): 2. arXiv:1603.09400. Bibcode:2016ApJ...824....2L. doi:10.3847/0004-637X/824/1/2. ISSN 0004-637X.
5. Leggett, S. K.; Tremblin, P.; Esplin, T. L.; Luhman, K. L.; Morley, Caroline V. (2017-06-01). "The Y-type Brown Dwarfs: Estimates of Mass and Age from New Astrometry, Homogenized Photometry, and Near-infrared Spectroscopy". The Astrophysical Journal. 842 (2): 118. arXiv:1704.03573. Bibcode:2017ApJ...842..118L. doi:10.3847/1538-4357/aa6fb5. ISSN 0004-637X.
6. Fontanive, Clémence; Bedin, Luigi R.; De Furio, Matthew; Biller, Beth; Anderson, Jay; Bonavita, Mariangela; Allers, Katelyn; Pantoja, Blake (2023-12-01). "An HST survey of 33 T8 to Y1 brown dwarfs: NIR photometry and multiplicity of the coldest isolated objects". Monthly Notices of the Royal Astronomical Society. 526 (2): 1783–1798. arXiv:2309.09923. Bibcode:2023MNRAS.526.1783F. doi:10.1093/mnras/stad2870. ISSN 0035-8711.

v t e Constellation of Reticulum
List of stars in Reticulum Reticulum in Chinese astronomy
Stars	Bayer α β γ δ ε ζ ζ η θ ι κ Variable R YZ HR 1475 HD 21693 21749 23079 (Tupi) 23127 25171 27894 Other 2MASS J03480772−6022270 WISE 0350−5658 WISE 0359−5401
Exoplanets ε Reticuli b HD 23079 b HD 23127 b HD 27894 b
Galaxies	NGC 1313 1559
Astronomical events SN 1997D SN 2005df
Category

• Local Bubble
• Y-type brown dwarfs
• Reticulum
• Astronomical objects discovered in 2012
• WISE objects