COROT planets |
COROT planets |
May 3 2007, 02:20 PM
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Junior Member Group: Members Posts: 22 Joined: 3-January 07 Member No.: 1551 |
http://news.bbc.co.uk/1/hi/sci/tech/6611557.stm
is reporting that Corot has found its first planet. I can't find an arxiv paper about this, or even a press release, but there are many here better at squirreling out data releases than me. 1.3Mj, 1.8Rj so it's a very inflated planet, 1.5-day orbit around a 'star quite similar to the Sun' might account for that. In the Monoceros field (Corot is now pointing at the Scutum/Aquila field). |
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Dec 12 2007, 12:52 PM
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Member Group: Members Posts: 813 Joined: 29-December 05 From: NE Oh, USA Member No.: 627 |
Thanks Jyril and ustrax...
I think I am looking at the 20th as more of a COROT team progress update, rather than a formal "look at the planets we found" announcement. Any terrestrial sized planet candidates are going to take some sensitive RV verifications, and will take a lot of dedicated ground telescope time ..... so I am not expecting any thing along those lines. Look forward all the same at learning how sensitive COROT is... the hints are tantalizing. Craig ps ustrax... good to see back with the blog!!!! |
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Dec 12 2007, 02:35 PM
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Junior Member Group: Members Posts: 87 Joined: 9-November 07 Member No.: 3958 |
Any terrestrial sized planet candidates are going to take some sensitive RV verifications, and will take a lot of dedicated ground telescope time ..... so I am not expecting any thing along those lines. The most sensitive Doppler detections are possible for planets which are known to transit. The star's mean Doppler shift varies during transit as the planet covers up pieces rotating at different line-of-sight velocities (the Rossiter-McLaughlin effect, IIRC). The amplitude of this effect often exceeds the reflex Doppler signature of the planet on the star's motion, as shown from Doppler curves of known transiting massive planets, and if you have the transit ephemeris you can time your observations to be specifically during the transit rather than requiring multiple periods. So this is another way that transit candidates can help leverage spectroscopic capabilities in a powerful way. A good thing, too, since there are ways dim stellar companions can do a good job of mimicking the behavior of a planetary transit (notably grazing secondary eclipses). |
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