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| Query : 2005A&A...430.1027C |
2005A&A...430.1027C - Astronomy and Astrophysics, volume 430, 1027-1033 (2005/2-2)
Astrometric and spectroscopic confirmation of a brown dwarf companion to GSC08047-00232 VLT/NACO deep imaging and spectroscopic observations.
CHAUVIN G., LAGRANGE A.-M., LACOMBE F., DUMAS C., MOUILLET D., ZUCKERMAN B., GENDRON E., SONG I., BEUZIT J.-L., LOWRANCE P. and FUSCO T.
Abstract (from CDS):
We report VLT/NACO imaging observations of the stars GSC 08047-00232 and HIP 6856, probable members of the large Tucana-Horologium association. During our previous ADONIS/SHARPII deep imaging survey, a substellar candidate companion was discovered around each star. Based on VLT/NACO astrometric measurements, we find that GSC 08047-00232 and the faint candidate companion near to it share the same proper motion with a significance of 3.1σ. On the contrary, the candidate companion to HIP 6856 is probably a background object with a significance of 4.3σ. We also detect a new fainter and closer candidate companion to HIP 6856, but which is likely a background object too with a significance of 4σ. Recent VLT/NACO spectroscopic measurements of GSC 08047-00232 finally confirm the substellar nature of this young brown dwarf with a derived spectral type M9.5±1. GSC 08047-00232B, with an estimated mass of 25±10MJup and an effective temperature of 2100±200K, is presently the third substellar companion identified among young, nearby associations.
Abstract Copyright: ∼
Journal keyword(s): instrumentation: adaptive optics - stars: low-mass, brown dwarfs
Simbad objects: 14
| Number of rows : 14 |
| N | Identifier | Otype |
ICRS (J2000) RA |
ICRS (J2000) DEC |
Mag U | Mag B | Mag V | Mag R | Mag I | Sp type |
#ref
1850 - 2024 |
#notes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | V* CC Phe | Er* | 01 28 08.6607223056 | -52 38 19.144933512 | 9.98 | 9.07 | K1V | 88 | 1 | |||
| 2 | NAME HIP 6856 cc-2 | * | 01 28 08.95 | -52 38 19.2 | ~ | 1 | 0 | |||||
| 3 | NAME HIP 6856 cc-1 | * | 01 28 09.15 | -52 38 19.1 | ~ | 1 | 0 | |||||
| 4 | CD-52 381 | Er* | 01 52 14.6257090872 | -52 19 33.184648704 | 11.836 | 10.953 | 10.42 | 9.825 | K2V(e) | 61 | 0 | |
| 5 | CD-52 381B | LM* | 01 52 14.63 | -52 19 30.0 | M9.5 | 23 | 0 | |||||
| 6 | HD 11965 | * | 01 56 09.4085842896 | -49 50 11.202022140 | 6.28 | 6.36 | B8/9V | 20 | 0 | |||
| 7 | NAME OMC-1 | MoC | 05 35 14 | -05 22.4 | ~ | 1170 | 2 | |||||
| 8 | COUP 621 | Y*O | 05 35 14.35371 | -05 22 32.8820 | ~ | 106 | 0 | |||||
| 9 | * tet Ori | ** | 05 35.3 | -05 24 | ~ | 40 | 1 | |||||
| 10 | HD 42581B | BD* | 06 10 34.80 | -21 52 00.0 | T6.5 | 504 | 0 | |||||
| 11 | V* GZ Vir | dS* | 13 13 13.7529732168 | -02 33 20.632129308 | 8.19 | 7.68 | F6V | 36 | 0 | |||
| 12 | GD 165B | BD* | 14 24 39.09480 | +09 17 10.4352 | 20.53 | L4V | 205 | 0 | ||||
| 13 | HD 208372 | * | 21 57 13.2240663816 | -51 04 16.254134616 | 10.139 | 9.711 | F8 | 13 | 0 | |||
| 14 | HD 211742A | * | 22 19 56.5927008815 | -36 41 41.901791417 | 10.93 | 10.46 | 10.389 | F6/7V | 18 | 0 |
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