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| Paper: |
Search for Extrasolar Planets Around Intermediate-Mass Stars: Precise Radial Velocity Measurements of Late-G Giants |
| Volume: |
294, Scientific Frontiers in Research on Extrasolar Planets |
| Page: |
51 |
| Authors: |
Sato, B.; Ando, H.; Kambe, E.; Takeda, Y.; Izumiura, H.; Masuda, S. |
| Abstract: |
We started a Doppler survey of late-G giants to search for planets around intermediate-mass stars (1.5-3 solar masses), which may help us to understand the formation and evolution of planetary systems. With the iodine cell installed in HIDES (HIgh Dispersion Echelle Spectrograph) at OAO (Okayama Astrophysical Observatory), we have achieved an accuracy of 5-6 meters/sec over a time span of 1 year. We here describe the outline of our project and report the first detections of radial velocity variations of several stars with time scales longer than 1 year and amplitudes of several hundred meters/sec. Our preliminary results also suggest that many of our targets are stable in radial velocity at a level of 5-20 meters/sec. |
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