WISE 0350−5658

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WISE J035000.32−565830.2
Reticulum constellation map.svg
Red pog.png
WISE 0350−5658
Location of WISE 0350−5658 in the constellation Reticulum

Observation data
Epoch J2000       Equinox J2000
Constellation Reticulum
Right ascension 03h 50m 00.32s [1]
Declination −56° 58 30.2 [1]
Characteristics
Spectral type Y1 [1]
Apparent magnitude  (J (MKO-NIR filter system))>22.8 [1]
Apparent magnitude  (H (MKO-NIR filter system))>21.5 [1]
Astrometry
Proper motion (μ)RA: −208.7±1.0  mas/yr [2]
Dec.: −575.4±1.1  mas/yr [2]
Parallax (π)176.4 ± 2.3  mas [2]
Distance 18.5 ± 0.2  ly
(5.67 ± 0.07  pc)
Details
Temperature 388±88 [2]   K
Other designations
WISE J035000.32−565830.2, [1]
WISE 0350−5658 [1]
Database references
SIMBAD data

WISE J035000.32−565830.2 (designation abbreviated to WISE 0350−5658) is a (sub-)brown dwarf of spectral class Y1, [1] located in constellation Reticulum, the nearest known star/brown dwarf in this constellation. Being approximately 18.5 light-years from Earth, [2] it is one of the Sun's nearest neighbors.

Contents

Discovery

WISE 0350-5658 with unWISE WISE 0350-5658 unWISE.jpg
WISE 0350-5658 with unWISE

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. [1]

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). [3]

Physical properties

WISE 0350−5658 was observed togehter 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 MJ was estimated in this work. [4] 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 MJ. These properties could be an indicator that it is a young Y-dwarf. [5] Another work using Hubble found a slightly higher mass of 7−13 MJ. [6]

See also

The other six discoveries of brown dwarfs, published in Kirkpatrick et al. (2012): [1]

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References

  1. 1 2 3 4 5 6 7 8 9 10 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. 1 2 3 4 5 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.