DENIS-P J020529.0−115925

DENIS-P J020529.0−115925 is a brown dwarf system in the constellation of Cetus. It is located 64 light-years (19.8 parsecs) away, based on the system's parallax.[4] It was first found in the Deep Near Infrared Survey of the Southern Sky.

DENIS-P J020529.0−115925A
Observation data
Epoch J2000      Equinox J2000
Constellation Cetus
Right ascension  02h 05m 29.401s[1]
Declination −11° 59′ 29.67″[1]
Characteristics
Spectral type L5.5 + L8 + T0[2]
Apparent magnitude (J) 14.587[1]
Astrometry
Proper motion (μ) RA: 427[3] mas/yr
Dec.: 52[3] mas/yr
Parallax (π)50.60 ± 1.50[4] mas
Distance64 ± 2 ly
(19.8 ± 0.6 pc)
Other designations
WDS J02055−1159AB, 2MASS J02052940−1159296
Database references
SIMBADdata

This is a triple brown dwarf system: objects that do not have enough mass to fuse hydrogen like stars. The two brightest components, designated A and B respectively, are both L-type objects. As of 2003, the two were separated 0.287° along a position angle of 246°.[2]

Component B was observed to elongated, suggesting a third component. This third component, named C, is a T-type object.[2] It is separated about 1.9 astronomical units (au) from B, and based on a total mass of 0.1 M☉, the two may orbit each other every 8 years.[2]

See also

References
  1. Cutri, R. M. (2003). "2MASS All-Sky Catalog of Point Sources". VizieR On-line Data Catalog. 2246. Bibcode:2003yCat.2246....0C.
  2. Bouy, H.; Martín, E. L.; Brandner, W.; Bouvier, J. (2005). "A Possible Third Component in the L Dwarf Binary System DENIS-P J020529.0-115925 Discovered with the Hubble Space Telescope". The Astronomical Journal. 129: 511. arXiv:astro-ph/0410226. Bibcode:2005AJ....129..511B. doi:10.1086/426559.
  3. Schmidt, Sarah J.; Cruz, Kelle L.; Bongiorno, Bethany J.; Liebert, James; Reid, I. Neill (2007). "Activity and Kinematics of Ultracool Dwarfs, Including an Amazing Flare Observation". The Astronomical Journal. 133 (5): 2258. arXiv:astro-ph/0701055. Bibcode:2007AJ....133.2258S. doi:10.1086/512158.
  4. Dahn, C. C.; Harris, Hugh C.; Vrba, Frederick J.; Guetter, Harry H.; Canzian, Blaise; Henden, Arne A.; Levine, Stephen E.; Luginbuhl, Christian B.; Monet, Alice K. B.; Monet, David G.; Pier, Jeffrey R.; Stone, Ronald C.; Walker, Richard L.; Burgasser, Adam J.; Gizis, John E.; Kirkpatrick, J. Davy; Liebert, James; Reid, I. Neill (2002). "Astrometry and Photometry for Cool Dwarfs and Brown Dwarfs". The Astronomical Journal. 124 (2): 1170–1189. arXiv:astro-ph/0205050. Bibcode:2002AJ....124.1170D. doi:10.1086/341646.


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