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Revealing the population of the young ASCC 20

hal.structure.identifierCentro de Astrobiologia [Madrid] [CAB]
dc.contributor.authorGALINDO-GUIL, F. J.
hal.structure.identifierCentro de Astrobiologia [Madrid] [CAB]
dc.contributor.authorBARRADO, D.
hal.structure.identifierM2A 2017
dc.contributor.authorBOUY, H.
dc.date.issued2017-03
dc.date.conference2016-07-18
dc.description.abstractEnWe 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.isoen
dc.title.enRevealing the population of the young ASCC 20
dc.typeCommunication dans un congrès
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Instrumentation et méthodes pour l'astrophysique [astro-ph.IM]
bordeaux.page505 - 505
bordeaux.conference.titleHighlights 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.countryES
bordeaux.conference.cityBilbao
bordeaux.peerReviewedoui
hal.identifierhal-01493798
hal.version1
hal.invitednon
hal.proceedingsoui
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01493798v1
bordeaux.COinSctx_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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