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| Paper: |
The Effects of Plage on Precision Radial Velocities |
| Volume: |
294, Scientific Frontiers in Research on Extrasolar Planets |
| Page: |
65 |
| Authors: |
Saar, S. H. |
| Abstract: |
I present the first results of semi-empirical modeling of the effects of magnetic plage on measured radial velocities in G stars. I use solar line bisectors observed in quiet and active regions at a range of disk positions as proxies for stellar bisectors. These are then used to "warp" model line profiles and construct model stars with various V sin i and plage areas. The models predict the sun should show a maximum of 10 m/sec short-term RV fluctuations atop approx. 3 m/sec long-term (cyclic) modulation, while a Hyades age G dwarf with V sin i = 6 km/sec exhibits approx. 90 m/sec (short-term) atop approx. 14 m/sec (long-term). |
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