NOAO >   Observing Info >   Approved Programs >   2017A-0111

Small NOAO Logo

Program Information for 2017A-0111


PI: Chien-Hsiu Lee, U. of Hawaii, leech@naoj.org
Address: 2800 Woodlawn Dr., HONOLULU, HI 96822 USA

Title: High precision photometry to constrain the fundamental properties of very low mass stars (VLMS)

Abstract: We propose a pilot program to constrain the properties of VLMS (less than 0.3 solar mass). VLMS are fully convective hence difficult to model; current models tend to under predict the size and over predict the temperature of VLMS. It is very important to resolve the discrepancies because numerous transiting exoplanets discovered by Kepler mission are hosted by M-dwarf stars with masses as low as VLMS. Without correctly characterizing the host stars, it is not possible to accurately infer exoplanets’ properties. We propose to use WIYN/ODI to obtain high-precision photometric follow-up of 5 double-lined eclipsing binaries composed of VLMS, which will provide independent and accurate measurements of the mass and radius of 10 VLMS. This will double the sample of VLMS with well-determined properties, and help us to resolve the discrepancies between modeling and observations, or establish an empirical mass-radius and mass-temperature relation for VLMS.

Program Type: Standard/NASA WIYN

Scheduled Nights:
Run 1 (2017A):  WIYN/ODI -- 3n on Feb 03 - Feb 05 2017


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



NOAO >   Observing Info >   Approved Programs >   2017A-0111

noaoprop-help@noao.edu

Small NOAO Logo