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30 Doradus: The Low-Mass Stars

Published online by Cambridge University Press:  25 May 2016

Hans Zinnecker ,
Bernhard Brandl ,
Wolfgang Brandner ,
Andrea Moneti  and
Deidre Hunter
Hans Zinnecker
Affiliation:
Astrophysikalisches Institut, An der Sternwarte 16, D-14482 Potsdam, Germany
Bernhard Brandl
Affiliation:
Cornell University, Department of Astronomy, Ithaca, NY 14853, USA
Wolfgang Brandner
Affiliation:
JPL/IPAC, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
Andrea Moneti
Affiliation:
ISO Science Operations Centre — VILSPA, Villafranca, 28080 Madrid, Spain
Deidre Hunter
Affiliation:
Lowell Observatory, 1400 W. Mars Hill Road, Flagstaff, AZ 86001, USA

Abstract

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We present a first analysis of our deep NICMOS/HST F160W images of the 30 Doradus cluster, aimed at detecting the low-mass stellar population (M ≤ 2 M⊙). We find that the infrared luminosity function keeps rising towards the faint end and that there is no indication of a low-mass IMF cut-off down to at least 1.5 M⊙. We also find a change of slope (steepening) in the luminosity function as a function of radial distance from the cluster center. The faintest stars we have detected have H=22.5 mag, corresponding to about M = 0.4 M⊙ at an age of 2 Myr.

Type
Part 3. Massive Stars and 30 Doradus
Information
Symposium - International Astronomical Union , Volume 190: New Views of the Magellanic Clouds , 1999 , pp. 222 - 226
Copyright
Copyright © Astronomical Society of the Pacific 1999 

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