Revealing the population of the young ASCC 20
| hal.structure.identifier | Centro de Astrobiologia [Madrid] [CAB] | |
| dc.contributor.author | GALINDO-GUIL, F. J. | |
| hal.structure.identifier | Centro de Astrobiologia [Madrid] [CAB] | |
| dc.contributor.author | BARRADO, D. | |
| hal.structure.identifier | M2A 2017 | |
| dc.contributor.author | BOUY, H. | |
| dc.date.issued | 2017-03 | |
| dc.date.conference | 2016-07-18 | |
| dc.description.abstractEn | We present the study of the open cluster ASCC-20. This young stellar association located at 450 pc and A_V = 0.129 mag is ˜ 20 Myr old based on the upper main sequence fitting. We have created a multi-wavelength photometric catalogue of cluster candidate members by using archival data and data-mining techniques. The complete set of photometric bands contains: B_TV_T from Tycho-2, griz from SDSS, JHK_s from 2MASS and W1W2W3W4 from WISE. In addition, we have followed-up 36 of our photometric candidates by using spectroscopic data with CAHA-TWIN. We have derived spectral types and confirmed their membership: 1) 50% of these sources are M dwarfs with the Hα spectral feature in emission; 2) models (Allard et al., 2012) indicate a mass of ˜0.25 M_{⊙} for the faintest object confirmed by spectroscopy, a M7. We have re-observed a subsample of 11 confirmed members of M spectral type and measured features related with their youth (e.g.: Li at 6707.8 Å) and metallicities by using GTC-OSIRIS at mid-resolution. Assuming a distance of 450 pc we report a Lithium Depletion Boundary age above 30 Myr, based on the faintest member of our sample without lithium (a M7). However a new study of the distance with Gaia will release a new insigth in the age of this cluster. | |
| dc.language.iso | en | |
| dc.title.en | Revealing the population of the young ASCC 20 | |
| dc.type | Communication dans un congrès | |
| dc.subject.hal | Planète et Univers [physics]/Astrophysique [astro-ph]/Instrumentation et méthodes pour l'astrophysique [astro-ph.IM] | |
| bordeaux.page | 505 - 505 | |
| bordeaux.conference.title | Highlights on Spanish Astrophysics IX, Proceedings of the XII Scientific Meeting of the Spanish Astronomical Society held on July 18-22, 2016, in Bilbao, Spain, ISBN 978-84-606-8760-3. S. Arribas, A. Alonso-Herrero, F. Figueras, C. Hernández-Monteagudo, A. Sánchez-Lavega, S. Pérez-Hoyos (eds.), 2017 , p. 505-505 | |
| bordeaux.country | ES | |
| bordeaux.conference.city | Bilbao | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-01493798 | |
| hal.version | 1 | |
| hal.invited | non | |
| hal.proceedings | oui | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-01493798v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.date=2017-03&rft.spage=505%20-%20505&rft.epage=505%20-%20505&rft.au=GALINDO-GUIL,%20F.%20J.&BARRADO,%20D.&BOUY,%20H.&rft.genre=unknown |
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