Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.1703v&link_type=abstract
American Astronomical Society, AAS Meeting #211, #17.03; Bulletin of the American Astronomical Society, Vol. 39, p.767
Astronomy and Astrophysics
Astronomy
Scientific paper
The dispersed fixed-delay interferometer represents a new instrument concept for high-precision radial velocity surveys for extrasolar planets. A combination of Michelson interferometer in series with a medium resolution spectrograph, it has the potential to perform multi-object surveying down to faint magnitude limits, where previous radial velocity techniques have been limited to observing only one target at at time. As a useful by-product, the instrument should in principle be capable of providing simple measurements of the projected rotational velocities of stars.
The development of this instrument has necessitated the development of new data reduction procedures to efficiently and reliably turn the raw data into meaningful results, and a careful consideration of precision levels and sources of error. This in turn has required establishing a detailed understanding of the physical principles behind the instrument.
The single-object Exoplanet Tracker installed at Kitt Peak National Observatory and the multi-object W. M. Keck Exoplanet Tracker at Apache Point Observatory are the first two instruments we have built built based on the new technique. The former served to prove the concept with a successful confirmation of the known planet, 51 Peg b, and was later used to discover a new planet, HD 102195 b, (ET-1). The latter has also demonstrated detection of known planets, and has been the focus for a pilot survey in preparation for a planned major wide-field survey over the next decade.
This work has been supported by the Keck Foundation, NSF, NOAO, NASA, U. Florida and Penn State University. The author gratefully acknowledges support from the SPIE, KPNO, and the JPL Michelson Fellowship Program funded by NASA.
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