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| Paper: |
Proxima Centauri: Time-resolved Astrometry of a Flare Site using {\it HST} Fine Guidance Sensor 3 |
| Volume: |
154, Cool Stars, Stellar Systems and the Sun: Tenth Cambridge Workshop |
| Page: |
1212 |
| Authors: |
Benedict, G. Fritz; McArthur, Barbara; Nelan, E.; Story, D.; Whipple, A. L.; Shelus, P. J.; Jefferys, W. H.; Hemenway, P. D.; Franz, Otto G.; Wasserman, L. H.; van Altena, W.; Fredrick, L. W. |
| Abstract: |
While carrying out astrometric monitoring of Proxima Centauri (a known flare star, V 645 Cen) for planetary mass companions with Hubble Space Telescope Fine Guidance Sensor 3 (FGS 3), we obtained photometry and astrometry for several significant and several minor flare events. For one major flare that produced a Delta V sim -0.6, time-resolved astrometry (effective 1 Hz rate) indicates a detonation at a distance 5.2 +/- 2.4 stellar radii from the center of Proxima Cen. |
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