We present the [X/H] trends as a function of the elemental condensation temperature Tc in 88 planet-host stars and in a volume-limited comparison sample of 33...

We present preliminary results obtained from the analysis of very deep echelle spectra of a dozen planetary nebulae with [WC] or weak emission lines (wels)...

We present 16600 equivalent widths (EWs) in the spectra of 100 and 94 stars with and without known planets, respectively. We have measured line-by-line EWs of...

As part of a continuing project using planetary nebulae (PNe) to study the chemical evolution and formation history of M31 (see accompanying poster by Balick et...

Extensive spectroscopic studies of stars with and without planets have concluded that stars hosting planets are significantly more metal-rich than those without...

We present Na, Mg and Al abundances in a set of 98 stars with known giant planets, and in a comparison sample of 41 "single" stars. The results show that the [X...

Extensive spectroscopic studies of stars with and without planetary systems have concluded that planet host stars are more metal-rich than those without...

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Listed are the [Mg/Fe], [Ca/Fe], [Ti/Fe] and [Si/Fe] abundance ratios for 650 K giants in four fields of the Galactic Bulge. Abundances were measured using...