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Radial Velocities for 889 Late-type Stars
David L. Nidever, Geoffrey W. Marcy, R. Paul Butler +2
We report radial velocities for 844 FGKM-type main sequence and subgiant stars and 45 K giants, most of which had either low-precision velocity measurements or none at all. These v…
Ten Low Mass Companions from the Keck Precision Velocity Survey
Steven S. Vogt, R. Paul Butler, Geoffrey W. Marcy +4
Ten new low mass companions have emerged from the Keck precision Doppler velocity survey, with minimum (msini) masses ranging from 0.8 mjup to 0.34 msun. Five of these are planet c…
High-Redshift Superwinds as the Source of the Strongest Mg II Absorbers: A Feasibility Analysis
N. A. Bond, C. W. Churchill, J. C. Charlton +1
We present HIRES/Keck profiles of four extremely strong (W_r > 1.8 A) Mg II absorbers at 1 < z < 2. The profiles display a common kinematic structure, having a sharp drop in optica…
The Kinematics of Intermediate Redshift Mg II Absorbers
Chris Churchill, Steven S. Vogt
[Abridged] We present 23 quasar absorption line systems selected by the MgII doublet with W_r(2796)>0.3 Ang over the redshift range 0.4<z<1.2. The kinematics are studied at ~6 km/s…
Evidence for Expanding Superbubbles in a Galaxy at z=0.7443
Nicholas A. Bond, Chris W. Churchill, Jane C. Charlton +1
The intervening z=0.7443 Mg II absorption system in the spectrum of MC 1331+170 shows an unusual series of line pairs, each with velocity separations of 30 km/s. These lines could…