# # Program information file # PROGRAM_ID 2022B030 PROGRAM_TITLE Precision Fundamental Properties of M Dwarf Stars using Eclipsing Binaries from TESS PROGRAM_INV1 Eunkyu Han PROGRAM_INV2 PROGRAM_INV3 PROGRAM_INV4 PROGRAM_INV5 PROGRAM_SCICAT stellar PROGRAM_ABSTRACT_BEG M dwarfs make up over 70% of stars by number in the Milky Way Galaxy and are known to host at least two exoplanets per star. Using mutually eclipsing double-lined spectroscopic binary stars [SB2 EBs], astronomers can empirically measure stellar properties such as mass and radius, which are critical in studying the exoplanets orbiting around M dwarfs. Recent studies showed that the combination of space-based photometry and high-resolution near-infrared spectroscopy is pivotal to the accuracy of the inferred low-mass EB parameters [7.8]. We propose to use iSHELL to measure radial velocities of component stars of SB2 EBs that are newly discovered by the TESS mission to determine the masses of each component. The direct outcome of the proposed work is empirically determined masses of M dwarfs which will be combined with the TESS data to build an accurate mass-radius relationship of M dwarfs. PROGRAM_ABSTRACT_END