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A Molecular Disk Survey of Low-Mass Stars in the TW Hya Association

Published online by Cambridge University Press:  27 January 2016

David R. Rodriguez ,
Gerrit van der Plas ,
Joel H. Kastner ,
Adam C. Schneider ,
Jacqueline K. Faherty ,
Diego Mardones ,
Subhanjoy Mohanty  and
David Principe
David R. Rodriguez
Affiliation:
Departamento de Astronomía, Universidad de Chile, Casilla 36-D, Santiago, Chile
Gerrit van der Plas
Affiliation:
Departamento de Astronomía, Universidad de Chile, Casilla 36-D, Santiago, Chile Millennium Nucleus Protoplanetary Disks, Chile
Joel H. Kastner
Affiliation:
Center for Imaging Science, School of Physics & Astronomy, and Laboratory for Multiwavelength Astrophysics, Rochester Institute of Technology, Rochester, NY 14623, USA
Adam C. Schneider
Affiliation:
Department of Physics and Astronomy, University of Toledo, Toledo, OH 43606, USA
Jacqueline K. Faherty
Affiliation:
Department of Terrestrial Magnetism, Carnegie Institution of Washington, Washington, DC 20015, USA Hubble Fellow
Diego Mardones
Affiliation:
Departamento de Astronomía, Universidad de Chile, Casilla 36-D, Santiago, Chile
Subhanjoy Mohanty
Affiliation:
Imperial College London, London SW7 2AZ, UK
David Principe
Affiliation:
Núcleo de Astronomía, Facultad de Ingeniería, Universidad Diego Portales, Santiago, Chile Millennium Nucleus Protoplanetary Disks, Chile
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Abstract

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We have carried out an ALMA Cycle 2 survey of 15 confirmed or candidate low-mass (<0.2M⊙) members of the TW Hya Association (TWA) with the goal of detecting line emission from CO molecular gas and continuum emission from cold dust. Our targets have spectral types of M4-L0 and hence represent the extreme low end of the TWA's mass function. The survey has yielded a detection of 12CO(2–1) emission around TWA 34. This newly discovered ~10 Myr-old molecular gas disk lies just ~50pc from Earth.

Keywords

open clusters and associations: individual (TWA)—protoplanetary disks—stars: evolution—stars: pre-main sequence
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Issue S314: Young Stars & Planets Near the Sun , November 2015 , pp. 207 - 208
Copyright
Copyright © International Astronomical Union 2016 

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