Determining Stellar Parameters With a Fixed Delay Interferometer

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

We present a method for determining stellar parameters using a new type of radial velocity instrument called Exoplanet Tracker (ET). This instrument combines a fixed delay interferometer with a post-dispersing medium-resolution spectrograph. We test the use of both R=6000 spectra as well as the interferometer fringe visibilities to determine parameters of several mediumto late-type dwarfs via fitting to synthetic models. In light of the upcoming All-Sky Extrasolar Planet Survey (ASEPS), this method will be useful for measuring basic physical parameters (effective temperature, log g , metallicity, and v sin i) of hundreds of thousands of stars which will be surveyed for planets using multiple versions of this type of instrument.

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