DENIS-P J1228.2-1547

DENIS-P J1228.2-1547
Observation data
Epoch J2000      Equinox J2000
Constellation Corvus
Right ascension 12h 28m 15.232s[1]
Declination −15° 47′ 34.23″[1]
Characteristics
Spectral type L5.5
Apparent magnitude (J) 14.378[2]
Apparent magnitude (H) 13.35[2]
Apparent magnitude (K) 12.767[2]
Astrometry
Parallax (π)49.40 ± 1.90[3] mas
Distance66 ± 3 ly
(20.2 ± 0.8 pc)
Other designations
DENIS J1228.2-1547, 2MASS J12281523-1547342, 2MUCD 11073
Database references
SIMBADdata

DENIS-P J1228.2-1547 is a system of two nearly equal brown dwarfs, both are of spectral types L5.5:,[4] located in constellation Corvus at approximately 20.2 parsecs or 66.0 light-years from Earth.[5]

History of observations

DENIS-P J1228.2-1547 is one on the first free-floating L dwarfs discovered. It was discovered in 1997 by Xavier Delfosse and colleagues from the DENIS survey.[6]

The second component (B) was discovered by Martín and colleagues using near-infrared camera NICMOS on Hubble Space Telescope. It was announced in 1999.[7]

See also

The other two free-floating L dwarfs, detected by Delfosse et al. and announced in 1997:[6]

A free-floating L dwarf, detected by Kirkpatrick et al., announced also in 1997, but earlier:[8]

A free-floating L dwarf, detected by Ruiz et al., announced also in 1997, but later:[9]

References

  1. 1 2 Cutri, R. M. (2003). "2MASS All-Sky Catalog of Point Sources". VizieR On-line Data Catalog. Bibcode:2003yCat.2246....0C.
  2. 1 2 3 "DENIS-P J1228.2-1547". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 27 December 2016.
  3. ↑ Faherty, Jacqueline K. (2012). "The Brown Dwarf Kinematics Project (BDKP). III. Parallaxes for 70 Ultracool Dwarfs". The Astrophysical Journal. 752. arXiv:1203.5543. Bibcode:2012ApJ...752...56F. doi:10.1088/0004-637X/752/1/56.
  4. ↑ Dupuy, Trent J.; Liu, Michael C. (2012). "The Hawaii Infrared Parallax Program. I. Ultracool Binaries and the L/T Transition". The Astrophysical Journal Supplement. 201 (2): 19. arXiv:1201.2465. Bibcode:2012ApJS..201...19D. doi:10.1088/0067-0049/201/2/19.
  5. ↑ 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.
  6. 1 2 Delfosse, X.; Tinney, C. G.; Forveille, T.; Epchtein, N.; Bertin, E.; Borsenberger, J.; Copet, E.; de Batz, B.; Fouque, P.; Kimeswenger, S.; Le Bertre, T.; Lacombe, F.; Rouan, D.; Tiphene, D. (1997). "Field brown dwarfs found by DENIS". Astronomy and Astrophysics. 327: L25–L28. Bibcode:1997A&A...327L..25D.
  7. ↑ Martín, E. L.; Brandner, W.; Basri, G. (1999). "A Search for Companions to Nearby Brown Dwarfs: The Binary DENIS-P J1228.2-1547". Science. 283 (5408): 1718–1720. Bibcode:1999Sci...283.1718M. doi:10.1126/science.283.5408.1718.
  8. ↑ Kirkpatrick, J. Davy; Beichman, Charles A.; Skrutskie, Michael F. (1997). "The Coolest Isolated M Dwarf and Other 2MASS Discoveries". The Astrophysical Journal. 476: 311. Bibcode:1997ApJ...476..311K. doi:10.1086/303613.
  9. ↑ Ruiz, Maria Teresa; Leggett, S. K.; Allard, France (1997). "Kelu-1: A Free-floating Brown Dwarf in the Solar Neighborhood". The Astrophysical Journal Letters. 491: L107. Bibcode:1997ApJ...491L.107R. doi:10.1086/311070.
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