Astronomy:DENIS-P J1228.2−1547
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| 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 |
| 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]
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 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]
- Deep Near Infrared Survey of the Southern Sky
- DENIS-P J1058.7-1548
- DENIS-P J020529.0-115925
- DENIS-P J082303.1-491201 b
- DENIS-P J101807.5-285931
A free-floating L dwarf, detected by Kirkpatrick et al., announced also in 1997, but earlier:[8]
- 2MASP J0345432+254023
A free-floating L dwarf, detected by Ruiz et al., announced also in 1997, but later:[9]
References
- ↑ 1.0 1.1 Cutri, Roc M.; Skrutskie, Michael F.; Van Dyk, Schuyler D.; Beichman, Charles A.; Carpenter, John M.; Chester, Thomas; Cambresy, Laurent; Evans, Tracey E. et al. (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. http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=II/246.
- ↑ 2.0 2.1 2.2 "DENIS-P J1228.2-1547". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=DENIS-P+J1228.2-1547.
- ↑ Faherty, Jacqueline K. (2012). "The Brown Dwarf Kinematics Project (BDKP). III. Parallaxes for 70 Ultracool Dwarfs". The Astrophysical Journal 752 (1): 56. doi:10.1088/0004-637X/752/1/56. Bibcode: 2012ApJ...752...56F.
- ↑ 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. doi:10.1088/0067-0049/201/2/19. Bibcode: 2012ApJS..201...19D.
- ↑ Dahn, C. C.; Harris, Hugh C.; Vrba, Frederick J.; Guetter, Harry H.; Canzian, Blaise; Henden, Arne A.; Levine, Stephen E.; Luginbuhl, Christian B. et al. (2002). "Astrometry and Photometry for Cool Dwarfs and Brown Dwarfs". The Astronomical Journal 124 (2): 1170–1189. doi:10.1086/341646. Bibcode: 2002AJ....124.1170D.
- ↑ 6.0 6.1 Delfosse, Xavier; Tinney, Chris G.; Forveille, Thierry; Epchtein, Nicolas; Bertin, Emmanuel; Borsenberger, Jean; Copet, Éric; de Batz, Bertrand et al. (1997). "Field brown dwarfs found by DENIS". Astronomy and Astrophysics 327: L25–L28. Bibcode: 1997A&A...327L..25D.
- ↑ 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. doi:10.1126/science.283.5408.1718. PMID 10073933. Bibcode: 1999Sci...283.1718M.
- ↑ 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. doi:10.1086/303613. Bibcode: 1997ApJ...476..311K.
- ↑ 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. doi:10.1086/311070. Bibcode: 1997ApJ...491L.107R.
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