how many of these ?
DESCRIPTION
Out there. How many of these ?. At least One in Six stars has an Earth-size planet. Francois Fressin, G. Torres, D. Charbonneau & the team. The list of Kepler candidates contains most of the knowledge about exoplanets. From the February 2012 catalog. - PowerPoint PPT PresentationTRANSCRIPT
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How many of these ?
Out there
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At least One in Six stars has an Earth-size planet
Francois Fressin, G. Torres, D. Charbonneau
& the team
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The list of Kepler candidates contains most of the knowledge about exoplanets.
From the February 2012 catalog
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The list of Kepler candidates contains most of the knowledge about exoplanets.
But it is not COMPLETE,
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The list of Kepler candidates contains most of the knowledge about exoplanets.
But it is not COMPLETE, and it is not PURE.
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An observed periodic transit signal could be due to:
Transiting Planet Eclipsing Binary
Kepler candidates PURITY : The issue of false positives
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An observed periodic transit signal could be due to:
Transiting Planet Eclipsing Binary
Kepler candidates PURITY : The issue of false positives
We found that they can only account for 9.5 % of the huge number of Kepler candidates
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Occurrence of Planets
Small
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The Occurrence of Earth-size planets
< 85 days ?
Habitable zone ?
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The Occurrence of Earth-size planets
17 %
< 85 days ?
Habitable zone ?
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The Occurrence of Earth-size planets
17 % Too Early to
call
< 85 days ?
Habitable zone ?
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17 % stars have an Earth-size planet within 85 days
And 70 % within 400 daysBut it does not include long-period Earths & Super Earths
Stars & Planetary Systems
Almost all Sun-like stars have a planetary system !
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Preliminary results for the New candidate catalog
The occurrence of planets we determined are in agreement with the new candidate list.
Kepler detection efficiency improved.
February 2012 January 2013
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It was previously thought that small planets were more common orbiting small stars
The results of Kepler can be explained with planets equally commonorbiting the different stellar types
Planets and stellar type
Sun
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At least 1 star in 6 has an Earth-size planet
Almost all stars have a planetary system
Small planets are equally common around all stars
Conclusions
17 %
Too early