A Search for Low Mass Stars and Brown Dwarfs in the Upper Scorpius OB Association

2004/11/19 by C. L. Slesnick, J. M. Carpenter, Slesnick, C. L. +3
Physics and Astronomy · #Astrophysics (astro-ph) #FOS: Physical sciences #astro-ph

paper · pdf · doi:10.48550/arxiv.astro-ph/0411585

4 pages, 2 figures, conference proceedings: "Low-mass Stars and Brown Dwarfs: IMF, Accretion and Activity", Volterra, October 17 - 20, 2004

arxiv created 2004/11/19 · arxiv updated 2009/12/01

Abstract

We are conducting a U,B,R,I monitoring program to identify pre-main sequence stars and brown dwarfs in a 12.5x12.2 square degree region of the Upper Scorpius OB association (5-10 Myr). We will use these data in combination with a follow-up spectroscopy survey to derive the low mass IMF in Upper Sco and to explore the prevalence of 5-10 Myr circumstellar disks. We will also analyze the spatial distribution of association members as a function of stellar mass, from which we will be able to place constraints on brown dwarf formation scenarios. We expect to identify 700-1800 previously unknown pre-main sequence objects in Upper Sco with M < 0.6 M_Sun. This dataset will constitute the largest sample known to date of stars/brown dwarfs at 5-10 Myr.

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