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| DOI | 10.1088/0004-637X/750/1/53 | ||||
| Año | 2012 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
We report the discovery of two low-mass companions to the young A0V star HD 1160 at projected separations of 81 +/- 5 AU (HD 1160 B) and 533 +/- 25 AU (HD 1160 C) by the Gemini NICI Planet-Finding Campaign. Very Large Telescope images of the system taken over a decade for the purpose of using HD 1160 A as a photometric calibrator confirm that both companions are physically associated. By comparing the system to members of young moving groups and open clusters with well-established ages, we estimate an age of 50(-40)(+50) Myr for HD 1160 ABC. While the UVW motion of the system does not match any known moving group, the small magnitude of the space velocity is consistent with youth. Near-IR spectroscopy shows HD 1160 C to be an M3.5 +/- 0.5 star with an estimated mass of 0.22(-0.04)(+0.03) M-circle dot, while NIR photometry of HD 1160 B suggests a brown dwarf with a mass of 33(-9)(+12) M-Jup. The very small mass ratio (0.014) between the A and B components of the system is rare for A star binaries, and would represent a planetary-mass companion were HD 1160 A to be slightly less massive than the Sun.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | Nielsen, Eric | Hombre |
Univ Hawaii - Estados Unidos
University of Hawaii at Manoa - Estados Unidos University Hawaii Institute for Astronomy - Estados Unidos |
| 2 | Merschmeyer, M. | Hombre |
Univ Hawaii - Estados Unidos
University of Hawaii at Manoa - Estados Unidos University Hawaii Institute for Astronomy - Estados Unidos |
| 3 | Wahhaj, Z. | Hombre |
Univ Hawaii - Estados Unidos
University of Hawaii at Manoa - Estados Unidos University Hawaii Institute for Astronomy - Estados Unidos |
| 4 | Biller, Beth | Mujer |
Max Planck Inst Astron - Alemania
Max Planck Institute for Astronomy - Alemania |
| 5 | Hayward, Thomas L. | Hombre |
AURA Chile - Chile
Gemini ObservatorySouthern Operations Center - Chile |
| 6 | Boss, Alan | Hombre |
Carnegie Inst Sci - Estados Unidos
Carnegie Institution of Washington - Estados Unidos |
| 7 | Bowler, Brendan P. | Hombre |
Univ Hawaii - Estados Unidos
University of Hawaii at Manoa - Estados Unidos University Hawaii Institute for Astronomy - Estados Unidos |
| 8 | Kraus, Adam | Hombre |
Univ Hawaii - Estados Unidos
University of Hawaii at Manoa - Estados Unidos University Hawaii Institute for Astronomy - Estados Unidos |
| 9 | Shkolnik, Evgenya | Mujer |
Lowell Observ - Estados Unidos
Lowell Observatory - Estados Unidos |
| 10 | Tecza, M. | Hombre |
UNIV OXFORD - Reino Unido
University of Oxford - Reino Unido |
| 11 | Chun, Mark | Hombre |
Univ Hawaii - Estados Unidos
University of Hawaii at Manoa - Estados Unidos University Hawaii Institute for Astronomy - Estados Unidos |
| 12 | Clarke, Fraser | Hombre |
UNIV OXFORD - Reino Unido
University of Oxford - Reino Unido |
| 13 | Close, Laird | Hombre |
UNIV ARIZONA - Estados Unidos
The University of Arizona - Estados Unidos |
| 14 | Ftaclas, Christ | Hombre |
Univ Hawaii - Estados Unidos
University of Hawaii at Manoa - Estados Unidos University Hawaii Institute for Astronomy - Estados Unidos |
| 15 | Hartung, Markus | Hombre |
UNIV ARIZONA - Estados Unidos
The University of Arizona - Estados Unidos |
| 16 | Males, Jared R. | Hombre |
UNIV ARIZONA - Estados Unidos
The University of Arizona - Estados Unidos |
| 17 | Reid, I. N. | - |
Space Telescope Sci Inst - Estados Unidos
STScI - Estados Unidos Space Telescope Science Institute - Estados Unidos |
| 18 | Skemer, A. | Hombre |
UNIV ARIZONA - Estados Unidos
The University of Arizona - Estados Unidos |
| 19 | Alencar, Silvia H. P. | Mujer |
Univ Fed Minas Gerais - Brasil
Universidade Federal de Minas Gerais - Brasil |
| 20 | Burrows, Adam S. | Hombre |
Princeton Univ - Estados Unidos
Princeton University - Estados Unidos |
| 21 | De Gouveia Dal Pino, E. M. | Mujer |
UNIV SAO PAULO - Brasil
Universidade de Sao Paulo - USP - Brasil Universidade de São Paulo - Brasil |
| 22 | Gregorio-Hetem, J. | Mujer |
UNIV SAO PAULO - Brasil
Universidade de Sao Paulo - USP - Brasil Universidade de São Paulo - Brasil |
| 23 | Kuchner, M. | Hombre |
NASA - Estados Unidos
NASA Goddard Space Flight Center - Estados Unidos |
| 24 | Thatte, N. | - |
Lowell Observ - Estados Unidos
Lowell Observatory - Estados Unidos |
| 25 | Toomey, Douglas | Hombre |
Mauna Kea Infrared LLC - Estados Unidos
Mauna Kea Infrared, LLC - Estados Unidos |
| Fuente |
|---|
| National Science Foundation |
| STFC |
| Science and Technology Facilities Council |
| National Aeronautics and Space Administration |
| Space Telescope Science Institute |
| Directorate for Mathematical and Physical Sciences |
| Agradecimiento |
|---|
| B.A.B was supported by Hubble Fellowship grant HST-HF-01204.01-A awarded by the Space Telescope Science Institute, which is operated by AURA for NASA, under contract NAS 5-26555. This work was supported in part by NSF grants AST-0713881 and AST-0709484. The Gemini Observatory is operated by the Association of Universities for Research in Astronomy, Inc., under a cooperative agreement with the NSF on behalf of the Gemini partnership: the National Science Foundation (United States), the Science and Technology Facilities Council (United Kingdom), the National Research Council (Canada), CONICYT (Chile), the Australian Research Council (Australia), CNPq (Brazil), and CONICET (Argentina). Based on observations made with the European Southern Observatory telescopes obtained from the ESO/ST-ECF Science Archive Facility. This publication makes use of data products from the Two Micron All Sky Survey, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation. This research has made use of the SIMBAD database, operated at CDS, Strasbourg, France. This research has made use of the VizieR catalogue access tool, CDS, Strasbourg, France. Some of the data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. This paper uses data from the Infrared Telescope Facility, which is operated by the University of Hawaii under Cooperative Agreement No. NNX-08AE38A with the National Aeronautics and Space Administration, Science Mission Directorate, Planetary Astronomy Program. |