Kepler Mission |
Kepler Mission |
Sep 24 2005, 04:23 PM
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#1
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Member Group: Members Posts: 147 Joined: 3-July 04 From: Chicago, IL Member No.: 91 |
This NASA Discovery mission is to be launched in June 2008 and will search for Earth-size and smaller planets. Launch was originally scheduled in 2007 but delayed by 8 months due to "funding constraints".
Here's the official web site: http://www.kepler.arc.nasa.gov/ |
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Guest_PhilCo126_* |
Aug 4 2009, 05:51 PM
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#2
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Guests |
Looking forward to Thursday's press conference... even with Kepler telescope's larger field of view and better optics, 3 transits are needed to confirm an exo-planet. So why shouldn't they require RV (Radial Velocity) confirmations... It could speed up the science output?
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Aug 4 2009, 07:10 PM
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#3
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Junior Member Group: Members Posts: 87 Joined: 9-November 07 Member No.: 3958 |
Looking forward to Thursday's press conference... even with Kepler telescope's larger field of view and better optics, 3 transits are needed to confirm an exo-planet. So why shouldn't they require RV (Radial Velocity) confirmations... It could speed up the science output? AFAIK, radial-velocity data cannot now reach the precision to see the Doppler signature of the Earth on the Sun, which is the spot everyone hopes Kepler reaches. For most potential host stars, noise due to such things as convective features on the star limits the precision reachable no matter how good the photon statistics are. However, radial-velocity confirmation of a different kind can come from changes in the star's velocity centroid during transit (the Rossiter-McLaughlin effect), which can have a rather larger amplitude than the reflex Doppler shift. Happening only during a single transit, it also places less stringent requirements on the star's own long-term stability in centroid velocity. Anyway, that's how I'd approach the followup. (Well, that and attempts to winnow out projected third stars blended with ordinary eclipsing binaries; RV studies could do a fair job at that by seeing multiple velocity components all the time). |
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