A New Echelle Spectrograph for Astroseismology

Details A New Echelle Spectrograph for Astroseismology A New Echelle Spectrograph for Astroseismology

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aas...18110116p&link_type=abstract

American Astronomical Society, 181st AAS Meeting, #101.16; Bulletin of the American Astronomical Society, Vol. 24, p.1283

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One of the most promising techniques for detecting acoustic oscillations in solar-like stars is the measurement of minute radial velocity shifts produced by the oscillations. Photon noise limitations can be alleviated by observing a large number of spectral lines simultaneously. To this end we have recently completed construction of a new high-resolution echelle spectrograph for the Palomar 200'' Hale telescope. The instrument has a 2-pixel resolving power of R=45000, and currently uses a 1024*E24 CCD to record 19 orders per frame. In this poster we describe the spectrograph design and construction details, its performance, and its potential for asteroseismology measurements.

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