The IMF of Low-Mass Stars and Brown Dwarfs in Taurus

Details The IMF of Low-Mass Stars and Brown Dwarfs in Taurus The IMF of Low-Mass Stars and Brown Dwarfs in Taurus

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...198.3304l&link_type=abstract

American Astronomical Society, 198th AAS Meeting, #33.04; Bulletin of the American Astronomical Society, Vol. 33, p.827

Astronomy and Astrophysics

Astronomy

Scientific paper

By combining deep optical imaging and infrared spectroscopy with data from the Two-Micron All-Sky Survey (2MASS) and from previous studies, I have measured the Initial Mass Function (IMF) for a reddening-limited sample in four fields in the Taurus star forming region. This IMF is representative of the young populations within these fields for masses above 0.02 Msun. Relative to the similarly derived IMF for the Trapezium Cluster (Luhman et al.), the IMF for Taurus exhibits a modest deficit of stars above one solar mass (i.e., steeper slope), the same turnover mass (0.8 Msun), and a significant deficit of brown dwarfs. If the IMF in Taurus were the same as that in the Trapezium, 12.8+/-1.8 brown dwarfs (>0.02 Msun) are expected in these Taurus fields where only one brown dwarf candidate is found. These results are used to test theories of the IMF.

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