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Planetary Companions Around Two Solar Type Stars: HD 195019 and HD 217107
D. A. Fischer, G. W. Marcy, R. P. Butler +2
We have enlarged the sample of stars in the planet search at Lick Observatory. Doppler measurements of 82 new stars observed at Lick Observatory, with additional velocities from Ke…
The Population of Weak Mg II Absorbers I. A Survey of 26 QSO HIRES/Keck Spectra
Christopher W. Churchill, Jane R. Rigby, Jane C. Charlton +1
We present a search for "weak" MgII absorbers [those with W_r(2796) < 0.3 A in the HIRES/Keck spectra of 26 QSOs. We found 30, of which 23 are newly discovered. The spectra are 80%…
A Planetary Companion to the Nearby M4 Dwarf, Gliese 876
G. W. Marcy, R. P. Butler, S. S. Vogt +2
Doppler measurements of the M4 dwarf star, Gliese 876, taken at both Lick and Keck Observatory reveal periodic, Keplerian velocity variations with a period of 61 days. The orbital…
The Internal Kinematics of the Leo I Dwarf Spheroidal Galaxy: Dark Matter at the Fringe of the Milky Way
Mario Mateo, Edward W. Olszewski, Steven S. Vogt +1
We present radial velocities of 33 red giants in the Leo I dSph galaxy obtained from spectra taken with the HIRES echelle spectrograph on the Keck I telescope. These data have a me…