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| DOI | 10.1086/675072 | ||||
| Año | 2014 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
We report the parallax and proper motion of five L dwarfs obtained with observations from the robotic Liverpool Telescope. Our derived proper motions are consistent with published values and have considerably smaller errors. Based on our spectral type versus absolute magnitude diagram, we do not find any evidence for binaries among our sampleor, at least no comparable mass binaries. Their space velocities locate them within the thin disk, and based on the model comparisons, they have solar-like abundances. For all five objects, we derived effective temperature, luminosity, radius, gravity, and mass from an evolutionary model (CBA00) and our measured parallax; moreover, we derived their effective temperature by integrating observed optical and near-infrared spectra and model spectra (BSH06 or BT-Dusty) at longer wavelengths to obtain bolometric flux using the classical Stefan-Boltzmann law. Generally, the three temperatures for one object derived using two different methods with three models are consistent, although at lower temperature (e.g., for L4) the differences among the three temperatures are slightly larger than those at higher temperature (e.g., for L1).
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | Wang, Y. | - |
CASSACA - China
Univ Chinese Acad Sci - China Univ Hertfordshire - Reino Unido |
| 2 | Jones, Hugh R. A. | Hombre |
Univ Hertfordshire - Reino Unido
University of Hertfordshire - Reino Unido |
| 3 | Smart, R. L. | Hombre |
Osserv Astron Torino - Italia
Istituto Nazionale Di Astrofisica, Rome - Italia |
| 4 | Marocco, F. | Hombre |
Univ Hertfordshire - Reino Unido
University of Hertfordshire - Reino Unido |
| 5 | Pinfield, David J. | Hombre |
Univ Hertfordshire - Reino Unido
University of Hertfordshire - Reino Unido |
| 6 | Shao, Zhengyi | - |
Key Lab Astrophys - China
Shanghai Astronomical Observatory Chinese Academy of Sciences - China Key Lab for Astrophysics - China |
| 7 | Steele, I. A. | Hombre |
Liverpool John Moores Univ - Reino Unido
Liverpool John Moores University - Reino Unido |
| 8 | Zhang, Z. | - |
CASSACA - China
Univ Hertfordshire - Reino Unido |
| 9 | Andrei, A. | - |
Osserv Astron Torino - Italia
Observ Nacl Mct - Brasil Istituto Nazionale Di Astrofisica, Rome - Italia Ministerio da Ciencia e Tecnologia - Brasil |
| 10 | Burgasser, Adam | Hombre |
Univ Calif San Diego - Estados Unidos
Center for Astrophysics & Space Sciences - Estados Unidos |
| 11 | Cruz, K. L. | - |
AMER MUSEUM NAT HIST - Estados Unidos
CUNY - Estados Unidos American Museum of Natural History - Estados Unidos Hunter College - Estados Unidos |
| 12 | Yu, J. | - |
CASSACA - China
Univ Chinese Acad Sci - China |
| 13 | Clarke, J. R. A. | Hombre |
Universidad de Valparaíso - Chile
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| 14 | Leigh, C. J. | - |
Liverpool John Moores Univ - Reino Unido
Liverpool John Moores University - Reino Unido |
| 15 | Sozzetti, A. | Hombre |
Osserv Astron Torino - Italia
Istituto Nazionale Di Astrofisica, Rome - Italia |
| 16 | Murray, D. N. | - |
Univ Hertfordshire - Reino Unido
University of Hertfordshire - Reino Unido |
| 17 | Burningham, B. | Hombre |
Univ Hertfordshire - Reino Unido
AMER MUSEUM NAT HIST - Estados Unidos University of Hertfordshire - Reino Unido American Museum of Natural History - Estados Unidos |
| Fuente |
|---|
| UK Science and Technology Facilities Council |
| STFC |
| Science and Technology Facilities Council |
| Royal Society |
| Seventh Framework Programme |
| IPERCOOL |
| PARSEC within the Marie Curie 7th European Community Framework Programme |
| Direct For Mathematical & Physical Scien; Division Of Astronomical Sciences |
| Agradecimiento |
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| We thank Leigh Smith from the University of Hertfordshire for his help in analyzing the image data. We thank Zhenghong Tang, Yong Yu, and Zhaoxiang Qi from Shanghai Astronomical Observatory for their helpful discussion on the centroiding precision. This work is partially funded by IPERCOOL n.247593 International Research Staff Exchange Scheme and PARSEC n. 236735 International Incoming Fellowship within the Marie Curie 7th European Community Framework Programme. YW and ZS acknowledge the support of NSFC10973028, 10833005, 10878003 and NKBRSF2007CB815403. RS and HRAJ acknowledge the support of Royal Society International Joint Project 2007/R3. This research has benefited from the M, L, and T dwarf compendium housed at DwarfArchive.org and maintained by Chris Gelino, Davy Kirkpatrick, and Adam Burgasser. The Liverpool Telescope is operated on the island of La Palma by Liverpool John Moores University in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofisica de Canarias with financial support from the UK Science and Technology Facilities Council. |