Physics
Scientific paper
Oct 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aps..tsf.ec012o&link_type=abstract
American Physical Society, Texas Section Fall Meeting, October 4-6, 2001 Fort Worth, Texas Meeting ID: TSF01, abstract #EC.012
Physics
Scientific paper
Radial-velocity surveys of nearby solar-type stars have found a number of extra-solar planets through the Doppler reflex stellar motion caused by the orbiting planet. Eight of the planets discovered to date are large (roughly the mass of Jupiter, or larger) and orbit their parent stars at separation of less than 0.1AU. These large, close-in planets can be detected directly via their reflected spectrum is periodically shifted back and forth through the stellar spectrum, causing variations in the observed stellar plus planetary spectrum. These variations are manifested as spectral-line profile variations, and detection of these variations would constitute the first direct detection of light from an extra-solar planet. A program to model the spectral variations has been developed here, and model results are presented which illustrate the expected spectral-line variations for different planetary system parameters. These models are applied to observed spectra of the extra-so! lar planetary system 51 Peg.
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