PI: Benjamin Montet, Caltech, Harvard, firstname.lastname@example.org
Address: Center forAstrophysics, 60 Garden Street, Cambridge, MA 02143, USA
CoI: Brendan Bowler, Caltech
CoI: Adam Kraus, Texas
CoI: Lynne Hillenbrand, Caltech
Title: Probing Fundamental Properties of Pre-Main Sequence M Dwarfs
Abstract: Despite their widespread use, evolutionary models of low-mass pre- main sequence (PMS) stars are poorly constrained by observations. Fewer than 10 PMS M dwarfs have had their mass directly measured, all of which are extremely young (<10 Myr). We have identified a sample of 54 stars in binary systems with ages 10-100 Myr where dynamical masses can be measured. Here, we propose observations of 12 of these systems with the Differential Speckle Survey Instrument (DSSI) on Gemini-North. These observations will allow for the total mass in each binary to be measured, and the dual-channel nature of DSSI will also enable us to measure resolved, simultaneous optical colors for each star, enabling significant constraints on the component spectral types. These observations will provide the first opportunity to test PMS models for stars with masses between 0.1 and 0.5 M_\odot and ages between 10 and 100 Myr.
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