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The Gaia-ESO Survey: Pre-Main Sequence Stars in the Young Open Cluster NGC 3293

Delgado, A.J.; Sampedro, L.; Alfaro, E.J.; Costado, M.T.; Yun, J.L.; Frasca, A.; Lanzafame, A.C.; Drew, J.E.; Eislöffel, J.; Blomme, R.; Morel, T.; Lobel, A.; Semaan, T.; Randich, S.; Jeffries, R.D.; Micela, G.; Vallenari, A.; Kalari, V.; Gilmore, G.; Flaccomio, E.; Carraro, G.; Lardo, C.; Monaco, L.; Prisinzano, L.; Sousa, S.G.; Morbidelli, L.; Lewis, J.; Koposov, S.; Hourihane, A.; Worley, C.; Casey, A.; Franciosini, E.; Sacco, G.; Magrini, L

The Gaia-ESO Survey: Pre-Main Sequence Stars in the Young Open Cluster NGC 3293 Thumbnail


A.J. Delgado

L. Sampedro

E.J. Alfaro

M.T. Costado

J.L. Yun

A. Frasca

A.C. Lanzafame

J.E. Drew

J. Eislöffel

R. Blomme

T. Morel

A. Lobel

T. Semaan

S. Randich

G. Micela

A. Vallenari

V. Kalari

G. Gilmore

E. Flaccomio

G. Carraro

C. Lardo

L. Monaco

L. Prisinzano

S.G. Sousa

L. Morbidelli

J. Lewis

S. Koposov

A. Hourihane

C. Worley

A. Casey

E. Franciosini

G. Sacco

L Magrini


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 Ha emission, are investigated for them. Marginal presence of Ha 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.

Journal Article Type Article
Acceptance Date May 20, 2016
Online Publication Date May 20, 2016
Publication Date Aug 11, 2016
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Publisher Oxford University Press
Peer Reviewed Peer Reviewed
Volume 460
Issue 3
Pages 3305-3315
Keywords open clusters and associations, general, individual, NGC 3293, stars, pre-main-sequence
Publisher URL


R Jeffries - The Gaia ESO Survey - Pre-main sequence stars in the young cluster NGC 3293.pdf (1.7 Mb)

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