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Star Clusters in the Era of Large Surveys pp 125–130Cite as

Probing the Low-Mass End of the IMF in Star-Forming Regions: AWIRCam/CFHT Survey

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Abstract

One of the most attempted goals of star formation theories is to determine the dominant process by which brown dwarfs form and the implications of the environment on its outcome. Current theories must be able to reproduce not only the observed shape of the IMF, but predict observable properties of clusters such as multiplicity, mass segregation, frequency and sizes of discs, accretion, etc. The new observational frontier is therefore the detection and characterization of very low mass objects in star forming regions, to confront model predictions from numerical simulations of the collapse of molecular clouds to the observed properties of YSOs. This is the main driver behind a WIRCam large program that has been conducted at CFHT to detect BD with masses between 1 and 30 Jupiter masses in a sample of 6 young clusters. I will present the main results obtained so far for the ρ Ophiuchi molecular cloud and IC 348, where a spectroscopic follow-up of many of these candidates is being conducted using several facilities (TNG, GTC, NTT, VLT, Gemini) to ascertain their spectral types and masses, and ultimately, to construct the low-mass end of the IMF for those star forming regions.

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Acknowledgements

We thank Loic Albert and Emmanuel Bertin, for their help with the observations and data reduction of the data for this WIRCam survey. Research supported by the Marie Curie Research Training Network CONSTELLATION under grant no. MRTN-CT-2006-035890.

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Authors and Affiliations

  1. Laboratoire d’Astrophysique de Grenoble, Observatoire de Grenoble, 53, 38041, Grenoble Cedex 9, France

    Catarina Alves de Oliveira, Estelle Moraux, Jerôme Bouvier & Andrew Burgess

  2. CAB-LAEFF, 78, E-28691, Villanueva de la Caada, Madrid, Spain

    Hervé Bouy

  3. Institut d’Astrophysique de Paris, 98bis Bd Arago, 75014, Paris, France

    Chiara Marmo & Patrick Hudelot

Authors
  1. Catarina Alves de Oliveira
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  2. Estelle Moraux
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  3. Jerôme Bouvier
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  4. Andrew Burgess
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  5. Hervé Bouy
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  6. Chiara Marmo
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  7. Patrick Hudelot
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Corresponding author

Correspondence to Catarina Alves de Oliveira .

Editor information

Editors and Affiliations

  1. , Fac. de Ciências da Univ. de Lisboa, SIM, Campo Grande, Edifício C8, Lisbon, 1749-016, Portugal

    André Moitinho

  2. Institute of Astronomy, Türkenschanzstrasse 17, Vienna, 1180, Austria

    João Alves

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de Oliveira, C.A. et al. (2012). Probing the Low-Mass End of the IMF in Star-Forming Regions: AWIRCam/CFHT Survey. In: Moitinho, A., Alves, J. (eds) Star Clusters in the Era of Large Surveys. Astrophysics and Space Science Proceedings. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-22113-2_18

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  • DOI: https://doi.org/10.1007/978-3-642-22113-2_18

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-22112-5

  • Online ISBN: 978-3-642-22113-2

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