Delgado, AJ, Sampedro, L, Alfaro, EJ, Costado, MT, Yun, JL, Frasca, A, Lanzafame, AC, Drew, JE, Eislofffel, J, Blomme, R, Morel, T, Lobel, A, Semaan, T, Randich, S, Jeffries, RD, Micela, G, Vallenari, A, Kalari, V, Flaccomio, E, Carraro, G, Lardo, C, Monaco, L, Prisinzano, L, Sousa, SG and Morbidelli, L (2016) The Gaia-ESO Survey: Pre-Main Sequence Stars in the Young Open Cluster NGC 3293. Monthly Notices of the Royal Astronomical Society, 460 (3). pp. 3305-3315. ISSN 1365-2966

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The young open cluster NGC3293 is included in the observing program of the Gaia-ESO survey (GES). The radial velocity values provided have been used to assign cluster membership probabilities by means of a single-variable parametric analysis. These membership probabilities are compared to the results of the photometric membership assignment of NGC3293, based on UBV RI photometry. The agreement of the photometric and kinematic member samples amounts to 65%, and could increase to 70% as suggested by the analysis of the differences between both samples. A number of photometric PMS candidate members of spectral type F are found, which are confirmed by the results from VPHAS photometry and SED fitting for the stars in common with VPHAS and GES data sets. Excesses at mid- and near-infrared wavelengths, and signs of Hα emission, are investigated for them. Marginal presence of Hα emission or infilling is detected for the candidate members. Several of them exhibit moderate signs of U excess and weak excesses at mid-IR wavelengths. We suggest that these features originate from accretion disks in their last stages of evolution.

Item Type: Article
Additional Information: This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2016 Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Uncontrolled Keywords: open clusters and associations, general, individual, NGC 3293, stars, pre-main-sequence
Subjects: Q Science > QB Astronomy
Divisions: Faculty of Natural Sciences > School of Physical and Geographical Sciences
Depositing User: Symplectic
Date Deposited: 25 May 2016 13:28
Last Modified: 06 Nov 2017 11:13

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