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fbtwitterlinkedinvimeoflicker grey 14rssslideshare1
Publisher: Oxford University Press
Languages: English
Types: Article
Subjects: pre-main-sequence [stars], QB, QC, Open clusters and associations: general, : Space science, astronomy & astrophysics [G05] [Physical, chemical, mathematical & earth Sciences], : Aérospatiale, astronomie & astrophysique [G05] [Physique, chimie, mathématiques & sciences de la terre], Stars: pre-main-sequence, Open clusters and associations: individual: NGC 3293, general [open clusters and associations], individual: NGC 3293 [open clusters and associations]
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 UBVRI photometry. The agreement of the photometric and kinematic member samples amounts to 65 per cent, and could increase to 70 per cent 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 discs in their last stages of evolution. Peer reviewed
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    • 2Instituto de Astrof´ısica e Cieˆncias do Espac¸o, Universidade de Lisboa, OAL, Tapada da Ajuda, PT1349-018 Lisboa, Portugal
    • 3Departament d'Astronomia i Meteorologia, Institut de Cie`ncies del Cosmos (ICCUB), Universitat de Barcelona (IEEC-UB), Mart´ı i Franque`s 1.
    • E-08028 Barcelona, Spain
    • 4INAF-Osservatorio Astrofisico di Catania, via S. Sofia 78, I-95123 Catania, Italy
    • 5Universita` di Catania, Dipartimento di Fisica e Astronomia, Sezione Astrofisica, via S. Sofia 78, I-95123 Catania, Italy
    • 6School of Physics, Astronomy and Mathematics, University of Hertfordshire, College Lane, Hatfield, Hertfordshire AL10 9AB, United Kingdom
    • 7Thu¨ringer Landessternwarte, Sternwarte 5, D-07778 Tautenburg, Germany
    • 8Royal Observatory of Belgium, Ringlaan 3, B-1180 Brussels, Belgium
    • 9Universite´ de Lie`ge, Institut d'Astrophysique et de Ge´ophysique, Alle´e du 6 Aouˆt, 17, B-4000 Lie`ge 1, Belgium
    • 10Geneva Observatory, University of Geneva, Maillettes 51, CH-1290 Sauverny, Switzerland
    • 11INAF - Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, I-50125 Florence, Italy
    • 12Astrophysics Group, Keele University, Keele, Staffordshire ST5 5BG, United Kingdom
    • 13INAF - Osservatorio Astronomico di Palermo, Piazza del Parlamento 1, I-90134 Palermo, Italy
    • 14INAF - Padova Observatory, Vicolo dell'Osservatorio 5, I-35122 Padova, Italy
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    • 17European Southern Observatory, Alonso de Cordova 3107 Vitacura, Santiago de Chile, Chile
    • 18Astrophysics Research Institute, Liverpool John Moores University, 146 Brownlow Hill, Liverpool L3 5RF, United Kingdom
    • 19Departamento de Ciencias Fisicas, Universidad Andres Bello, Republica 220, Santiago, Chile
    • 20Instituto de Astrof´ısica e Cieˆncias do Espac¸o, Universidade do Porto, CAUP, Rua das Estrelas, P-4150-762 Porto, Portugal
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Funded by projects

  • FCT | UID/FIS/04434/2013
  • FCT | SFRH/BSAB/1423/2014
  • EC | GAIA-ESO-MW

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