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DENIS-P J1228.2−1547

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DENIS-P J1228.2-1547
DENIS-P J1228.2-1547 legacy dr10.jpg
DENIS-P J1228.2−1547
Credit: legacy surveys
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  mas [3]
Distance 66 ± 3  ly
(20.2 ± 0.8  pc)
Other designations
DENIS J1228.2-1547, 2MASS J12281523-1547342, 2MUCD 11073
Database references
SIMBAD data

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]

Contents

History of observations

DENIS-P J1228.2-1547 was 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 Eduardo L. 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, Roc M.; Skrutskie, Michael F.; Van Dyk, Schuyler D.; Beichman, Charles A.; Carpenter, John M.; Chester, Thomas; Cambresy, Laurent; Evans, Tracey E.; Fowler, John W.; Gizis, John E.; Howard, Elizabeth V.; Huchra, John P.; Jarrett, Thomas H.; Kopan, Eugene L.; Kirkpatrick, J. Davy; Light, Robert M.; Marsh, Kenneth A.; McCallon, Howard L.; Schneider, Stephen E.; Stiening, Rae; Sykes, Matthew J.; Weinberg, Martin D.; Wheaton, William A.; Wheelock, Sherry L.; Zacarias, N. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". CDS/ADC Collection of Electronic Catalogues. 2246: II/246. 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 (1): 56. arXiv: 1203.5543 . Bibcode:2012ApJ...752...56F. doi:10.1088/0004-637X/752/1/56. S2CID   18160586.
  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. S2CID   119256363.
  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. S2CID   119485007.
  6. 1 2 Delfosse, Xavier; Tinney, Chris G.; Forveille, Thierry; Epchtein, Nicolas; Bertin, Emmanuel; Borsenberger, Jean; Copet, Éric; de Batz, Bertrand; Fouqué, Pascal; Kimeswenger, Stefan; Le Bertre, Thibaut; Lacombe, François; Rouan, Daniel; Tiphène, Didier (1997). "Field brown dwarfs found by DENIS". Astronomy and Astrophysics . 327: L25–L28. Bibcode:1997A&A...327L..25D.
  7. ↑ Martín, Eduardo L.; Brandner, W.; Basri, Gibor (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. PMID   10073933.
  8. ↑ Kirkpatrick, J. Davy; Beichman, Charles A.; Skrutskie, Michael F. (1997). "The Coolest Isolated M Dwarf and Other 2MASS Discoveries". The Astrophysical Journal . 476 (1): 311–318. 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 (2): L107–L110. Bibcode:1997ApJ...491L.107R. doi: 10.1086/311070 .
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