A Search for Line Shape and Depth Variations in 51 Pegasi and Tau Bootis

Details A Search for Line Shape and Depth Variations in 51 Pegasi and Tau Bootis A Search for Line Shape and Depth Variations in 51 Pegasi and Tau Bootis

1997-12-19

arxiv.org/abs/astro-ph/9712279v1

Astronomy and Astrophysics

Astrophysics

10 pages, 2 figures, plain TeX, accepted for publication in ApJL

Scientific paper

10.1086/311168

Spectroscopic observations of 51 Pegasi and tau Bootis show no periodic changes in the shapes of their line profiles; these results for 51 Peg are in significant conflict with those reported by Gray and Hatzes (1997). Our detection limits are small enough to rule out nonradial pulsations as the cause of the variability in tau Boo, but not in 51 Peg. The absence of line shape changes is consistent with these stars' radial velocity variability arising from planetary-mass companions.

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