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| DOI | 10.1051/0004-6361/201219374 | ||||
| Año | 2012 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
Results. We report very strong differences in the disk fractions of low-mass stars and brown dwarfs (similar to 58%) when compared to higher mass stars (26(3)(+4)% ), with 0.6 M-circle dot being the critical mass we find for this dichotomy. As a byproduct, we address the implications of the spatial distribution of disk and diskless members in the formation scenario of the cluster itself. We used the Ha emission to distinguish among accreting and non-accreting sources, finding that 38(-7)(+8)% of sources harboring disks undergo active accretion and that his percentage stays similar in the substellar regime. For these sources we have estimated accretion rates. Finally, regarding rotational velocities, we find a high dispersion in nu sin(i) that is even higher among the diskless population.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | Bayos, Amelia | Mujer |
ESO - Chile
European Southern Observatory Santiago - Chile Observatorio Europeo Austral - Chile |
| 2 | Barrado, D. | Hombre |
Ctr Astron Hispano Aleman - España
CSIC - España Centro Astronómico Hispano-Alemán - España Centro de Astrobiología (CSIC-INTA) - España |
| 3 | Huelamo, Nuria | Mujer |
CSIC - España
Centro de Astrobiología (CSIC-INTA) - España |
| 4 | Morales Calderon, M. | Mujer |
CALTECH - Estados Unidos
Spitzer Science Center - Estados Unidos |
| 5 | DE FIGUEIREDO-MELO, CLAUDIO HENRIQUE | Hombre |
ESO - Chile
European Southern Observatory Santiago - Chile Observatorio Europeo Austral - Chile |
| 6 | Stauffer, John | Hombre |
CALTECH - Estados Unidos
Spitzer Science Center - Estados Unidos |
| 7 | Stenzel, H. | Mujer |
Osserv Astron Palermo - Italia
Istituto Nazionale Di Astrofisica, Rome - Italia |
| Fuente |
|---|
| European Commission |
| Ministerio de Ciencia e Innovación |
| Spanish MICINN |
| Ministerio de Ciencia e Innovación |
| Spanish grants |
| FP7 People: Marie-Curie Actions |
| Marie Curie |
| ESO observing programs |
| Agradecimiento |
|---|
| Based on the ESO observing programs 080.C-0592 and 078.C-0124; and observing programs from Calar Alto, Keck, Subaru, and Magellan. |
| A. Bayo would like to thank B. Montesinos for the interesting discussion about the rotational velocity determination and H. Bouy and M. Lopez del Fresno for very useful advice in statistics. This publication makes use of VOSA, developed under the Spanish Virtual Observatory project supported from the Spanish MICINN through grant AYA2008-02156. This work was co-funded under the Marie Curie Actions of the European Commission (FP7-COFUND) and Spanish grants AYA2010-21161-C02-02, CDS2006-00070 and PRICIT-S2009/ESP-1496. |