Colloquium: Dr. Cullen Blake, University of Pennsylvania
ABSTRACT: Recent results from Kepler and
ground-based exoplanet surveys suggest that low-mass stars are host to numerous
small planets. Since low-mass stars are intrinsically faint at optical
wavelengths, obtaining the Doppler precision necessary to detect these
companions remains a challenge for existing instruments. I will describe
MINERVA-Red, a project to use a robotic, near-infrared optimized 0.7 meter
telescope and a specialized Doppler spectrometer to carry out an intensive, multi-year
campaign designed to reveal the planetary systems orbiting some of the closest
stars to the Sun. The MINERVA-Red cross-dispersed echelle spectrograph is
optimized for the “deep red”, between 800 nm and 900 nm, where the stars that
will be targeted are relatively bright. The instrument is very compact and
designed for the ultimate in Doppler precision – it uses a single-mode fiber
input. I will describe the spectrometer and the status of the MINERVA-Red
project, which is expected to begin routine operations at Whipple Observatory
on
Mt Hopkins, Arizona, in 2017.