THE FORMATION AND EARLY EVOLUTION OF BROWN DWARFS VIEWED THROUGH THE ORION DISPERSED POPULATIONS
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| Format: | Artículo científico |
| Language: | en |
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Universidad Nacional Autónoma de México
2011
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| author | J. J. Downes |
| author_facet | J. J. Downes |
| contents | THE FORMATION AND EARLY EVOLUTION OF BROWN DWARFS VIEWED THROUGH THE ORION DISPERSED POPULATIONS J. J. Downes C. Briceño C. Mateu J. Hernández N. Calvet L. Hartmann Física, Astronomía y Matemáticas stars low mass formation Brown dwarfs We present an overview of the latest results of an ongoing large-scale, optical photometric and spectroscopic survey of very low mass stars and brown dwarfs down to M - 0.02 M¡Ñ in the dispersed, off-cloud populations of the Orion OB1 star forming region. The survey is based on the combination of multi-epoch optical photometry in R and I bands obtained with the Quest-I camera at the Venezuela National Astronomical Observatory, with near-IR data from the VISTA and 2MASS surveys, spanning a total area of -200 deg2. The photometric survey is being complemented with follow up optical spectroscopy on the Hectospec instrument on the 6.5 m MMT, which so far has provided spectroscopic confirmation of young brown dwarfs down to -0.05 Mo over 6 deg2. An overview of the results on the sample of stellar and substellar objects spectroscopically confirmed as members of Orion and those that still remain as photometric candidates are presented, focus on the initial mass function, the mass dependence of the spatial distribution, the near infrared excesses and the fraction of objects with Classical or Weak T Tauri-like characteristics. These results will be extended and discussed in terms of the predictions from brown dwarf formation models in Downes, J. J., et al. (2011, in preparation). 2011 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57121297113 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Vol.40 |
| format | Artículo científico |
| id | redalyc_57121297113 |
| institution | Redalyc |
| language | en |
| publishDate | 2011 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | THE FORMATION AND EARLY EVOLUTION OF BROWN DWARFS VIEWED THROUGH THE ORION DISPERSED POPULATIONS J. J. Downes Física, Astronomía y Matemáticas stars low mass formation Brown dwarfs THE FORMATION AND EARLY EVOLUTION OF BROWN DWARFS VIEWED THROUGH THE ORION DISPERSED POPULATIONS J. J. Downes C. Briceño C. Mateu J. Hernández N. Calvet L. Hartmann Física, Astronomía y Matemáticas stars low mass formation Brown dwarfs We present an overview of the latest results of an ongoing large-scale, optical photometric and spectroscopic survey of very low mass stars and brown dwarfs down to M - 0.02 M¡Ñ in the dispersed, off-cloud populations of the Orion OB1 star forming region. The survey is based on the combination of multi-epoch optical photometry in R and I bands obtained with the Quest-I camera at the Venezuela National Astronomical Observatory, with near-IR data from the VISTA and 2MASS surveys, spanning a total area of -200 deg2. The photometric survey is being complemented with follow up optical spectroscopy on the Hectospec instrument on the 6.5 m MMT, which so far has provided spectroscopic confirmation of young brown dwarfs down to -0.05 Mo over 6 deg2. An overview of the results on the sample of stellar and substellar objects spectroscopically confirmed as members of Orion and those that still remain as photometric candidates are presented, focus on the initial mass function, the mass dependence of the spatial distribution, the near infrared excesses and the fraction of objects with Classical or Weak T Tauri-like characteristics. These results will be extended and discussed in terms of the predictions from brown dwarf formation models in Downes, J. J., et al. (2011, in preparation). 2011 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57121297113 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Vol.40 |
| title | THE FORMATION AND EARLY EVOLUTION OF BROWN DWARFS VIEWED THROUGH THE ORION DISPERSED POPULATIONS |
| topic | Física, Astronomía y Matemáticas stars low mass formation Brown dwarfs |
| url | https://www.redalyc.org/articulo.oa?id=57121297113 |