Kepler-429 (KIC10001893): KOI-55-like system

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Kepler-429 (KIC10001893): KOI-55-like system

Post by Lazarus on 25th September 2014, 1:47 am

Very compact (5 -- 20 hour orbits) three planet system around and sdB star, inferred from light modulations. Perhaps.

Silvotti et al. "Kepler detection of a new extreme planetary system orbiting the subdwarf-B pulsator KIC10001893"
http://arxiv.org/abs/1409.6975

Although the most convincing interpretation of the low frequencies detected by Kepler in KIC 10001893 (and KIC 05807616) is the presence of Earth-size close-in planets, we do not consider these data and their analysis adequate to definitively prove that these extreme planetary systems around sdB stars do exist. Rather, we think that these data are enough to seriously pose the question. A final answer to this question will be given when it will be possible to confirm these detections with independent methods (e.g., RVs with PEPSI@LBT) and/or find further planetary systems similar to them.

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Re: Kepler-429 (KIC10001893): KOI-55-like system

Post by Edasich on 25th September 2014, 3:16 am

So this kind of planetary system is more frequent than previously thought.

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Re: Kepler-429 (KIC10001893): KOI-55-like system

Post by Sirius_Alpha on 25th September 2014, 3:13 pm

A very worthwhile word of caution in the paper regarding these kinds of planetary systems.

Finally, we want to add a few words of caution. Although the most convincing interpretation of the low frequencies detected by Kepler in KIC 10001893 (and KIC 05807616) is the presence of Earth-sized close-in planets, we do not consider these data and their analysis adequate to definitively prove that these extreme planetary systems around sdB stars do exist. Rather, we think that these data are enough to seriously pose the question. A final answer to this question will be given when it will be possible to confirm these detections with independent methods (e.g., RVs with PEPSI@LBT) and/or find further planetary systems similar to them. A program to search for planets/planetary remnants close to bright sdB stars has recently been started using HARPS-N@TNG.

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Re: Kepler-429 (KIC10001893): KOI-55-like system

Post by Lazarus on 3rd October 2014, 4:32 pm

This system is now assigned the designation Kepler-429, according to the NASA Exoplanet Archive.

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Re: Kepler-429 (KIC10001893): KOI-55-like system

Post by Sirius_Alpha on 3rd October 2014, 7:02 pm

I've updated the thread title accordingly.

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Re: Kepler-429 (KIC10001893): KOI-55-like system

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