NOAO >   Observing Info >   Approved Programs >   2016A-0224

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Program Information for 2016A-0224


PI: Benjamin Montet, California Institute of Technology, btm@astro.caltech.edu
Address: MS 249-17, Pasadena, CA, 91125 USA

CoI: Brendan P Bowler, U. of Texas, Austin
CoI: Lynne Hillenbrand, California Institute of Technology
CoI: Adam Kraus, U. of Texas, Austin
CoI: Michael C Liu, U. of Hawaii
CoI: Evgenya Shkolnik, Arizona State U.

Title: Fundamental Parameters of Young 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 10 of these systems with the Differential Speckle Survey Instrument (DSSI) on Gemini-South as a continuation of our successful DSSI Gemini-North program. These observations will allow for the total mass in each binary to be measured, while the dual-channel nature of DSSI will also enable us to measure resolved, simultaneous optical colors for each star, enabling measurements of spectral types for each component. These observations will allow us to measure the masses of these stars to better than 20 percent, and will provide the first opportunity to test PMS models for stars with masses between 0.1 and 0.5 solar masses and ages between 10 and 100 Myr.

Program Type: Standard/Galactic

Scheduled Nights:
Run 1 (2016A):  GEM-S-SVC/DSSI -- 7.3hrs band 1 (GS-2016A-Q-14)


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NOAO >   Observing Info >   Approved Programs >   2016A-0224

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