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| Paper: |
The Texas High-Precision Radial-Velocity Program |
| Volume: |
185, Precise Stellar Radial Velocities, IAU Colloquium 170 |
| Page: |
113 |
| Authors: |
Cochran, W. D.; Hatzes, A. P. |
| Abstract: |
The University of Texas program for the measurement of high precision stellar radial velocity variations has expanded considerably during the past few years, and now comprises four separate efforts: 1) The McDonald Observatory Planet Search (MOPS) program, using the coude spectrograph of the 2.7m Harlan Smith Telescope, now has eleven years of data. In addition to the companion to 16 Cygni B, several of the program stars are showing interesting variations, and may eventually be shown to have substellar companions. 2) The ESO Planet Search (ESOPS), using an I2 collaboration with Martin Kurster, Konrad Dennerl and Stefan Dobereiner, was the first high precision Southern Hemisphere radial velocity survey. This program now has accumulated five years of data on 37 target stars. Results on interesting objects, such as Proxima Centauri, will be shown. 3) In 1996 we started a search for substellar companions to Hyades dwarfs, using the Keck 1 HIRES spectrograph and I2 cell. The Hyades provide a homogeneous sample of stars formed at the same time with the same composition. The goal of this program is to determine the dependence of planet formation on the one remaining independent variable in the sample, the stellar mass. 4) The Hobby Eberly Telescope is now in the middle of its scientific commissioning. Its high resolution spectrograph will be installed in the fall of 1998. This queue scheduled telescope is an ideal facility to use for a detailed survey of a broad sample of stars in the solar neighborhood. |
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