Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997dps....29.2818c&link_type=abstract
American Astronomical Society, DPS meeting #29, #28.18; Bulletin of the American Astronomical Society, Vol. 29, p.1028
Astronomy and Astrophysics
Astronomy
1
Scientific paper
The claimed detection of photospheric line profile variability in 51 Peg by Gray (1997) and the resulting controversy over whether the observed radial velocity variations of that stars are the result of stellar reflex motion due to a planetary companion or are a manifestation of stellar pulsation has prompted us to search for similar spectral variability in tau Boo. This star shows radial velocity variations with an even smaller period (3.31 days) and a velocity amplitude (469ms(-1) ) eight times larger than that of 51 Peg. If tau Boo is also merely a pulsating star (as Gray claims is true of 51 Peg), then it should show line profile variations much larger than those seen in 51 Peg. We used the high resolution (R = 230,000) mode of the 2dcoude spectrograph of the McDonald Observatory 2.7m Harlan Smith Telescope to observe tau Boo in January, March and May 1997. The results of the line bisector analysis are presented, and their implications for the existence of planets in very short period orbits are discussed.
Cochran William D.
Hatzes Artie P.
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