3 papers
astro-ph2002
Modulation of Ca II H & K Emission by Short-Period Planets
Evgenya Shkolnik, Gordon A. H. Walker, David A. Bohlender
We have detected modulation of the Ca II H&K reversal structure in four out of five 51 Peg-type stars whose planets have orbital periods between 3 and 4 days. We observe two effect…
astro-ph1998
The incidence of nonradial pulsation in the lambda Bootis stars
D. A. Bohlender, J. -F. Gonzalez, J. M. Matthews
We have completed a high-resolution, high-signal-to-noise, spectroscopic survey of the northern members of the peculiar lambda Boo stars in order to investigate the frequency of th…
astro-ph1998
Mercury and platinum abundances in mercury-manganese stars
C. M. Jomaron, M. M. Dworetsky, D. A. Bohlender
We report new results for the elemental and isotopic abundances of the normally rare elements mercury and platinum in HgMn stars. Typical overabundances can be 4 dex or more. The i…