Second Kepler Science Conference Nov. 4-8

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Re: Second Kepler Science Conference Nov. 4-8

Post by Led_Zep on 6th November 2013, 1:20 pm

Circumbinay systems discovered with KEPLER
Unfortunately we can't read the last KIC (7821010 ??) but the rate 204 %
What does it mean ?




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Re: Second Kepler Science Conference Nov. 4-8

Post by Stalker on 6th November 2013, 4:58 pm

Concerning KOI-1422 and KOI-4036, EPC have enties for the 6 candidates. I hope the final caracteristics are "better". KOI-4036.01 seems to be in the habitable zone but is 3 time bigger than Earth. The same problem exist for KOI-1422.04, the outermost planet of the red dwarf. It seems that the other two planet in the "habitable zone" are .02 (barrely too in the HZ) and .05 (too hot), but both are 2.8 and 4(!) time bigger than earth.

https://github.com/hannorein/open_exoplanet_catalogue/blob/master/systems_kepler/KOI-1422.xml

https://github.com/hannorein/open_exoplanet_catalogue/blob/master/systems_kepler/KOI-4036.xml

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Re: Second Kepler Science Conference Nov. 4-8

Post by Lazarus on 6th November 2013, 6:43 pm

Led_Zep wrote:Circumbinay systems discovered with KEPLER
Unfortunately we can't read the last KIC (7821010 ??) but the rate 204 %
What does it mean ?
Looks like the difference between the planet's semimajor axis and the critical semimajor axis within which orbits are unstable.

a/ac = ap / ac − 1

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Re: Second Kepler Science Conference Nov. 4-8

Post by Shellface on 6th November 2013, 6:47 pm

@Stalker:
…How did you get those numbers? The radii listed are in RJ, and with the conversion RJ = 10.97 R, I get radii consistent with those listed here for all of the candidates (note that KOI-4036.01's radius has an error larger than its value, and I can't tell why). Also, is an equilibrium temperature of 24°c (KOI-1422.05) really too hot? (I'll give you .02 with Teq = 82°c, though)

@Led_Zep, Lazarus
Yeah, I think that's right. It looks like that last one lies at about 3 times the critical semimajor axis, while the others are a lot closer to instability. Indeed, the last one on the list has a very long period for a Kepler detection, with an orbital period of 2.7 years(!)

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Re: Second Kepler Science Conference Nov. 4-8

Post by Lazarus on 6th November 2013, 7:03 pm

Shellface wrote:It's a bit short of Saturn-sized, which is consistent with the previously discovered circumbinary giant planets and continues to support a lack of Jupiters.
Certainly seems to be a suggestive trend (and it is one of the results of exoplanet discoveries that was predicted in advance from theoretical considerations), but is there any indication on the significance of the difference between the circumbinary planet distribution and the single star planet distribution chopped off at the critical semimajor axis?

And is it possible at all to find a scenario where the Kepler circumbinary systems can evolve into something that looks like the claimed PCEB systems?

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Re: Second Kepler Science Conference Nov. 4-8

Post by Led_Zep on 6th November 2013, 8:29 pm




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Re: Second Kepler Science Conference Nov. 4-8

Post by Shellface on 6th November 2013, 10:29 pm

Ah, these look like results from the SOPHIE - HARPS-N co-observation work. Man, they only got 3 nights on Hot Jupiters last season?! HARPS-N time must really be very focused on smaller or longer period planets, huh.

Looks like the only one of those that has had previously published RV measurements is KOI-192 in Santerne et al. (2012). No variation was detected to 23 m/s there, putting a 3σ upper limit on the planet's mass of 0.59 MJ. I guess it is indeed a Saturn-like planet, as suggested in the paper.

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Re: Second Kepler Science Conference Nov. 4-8

Post by Stalker on 7th November 2013, 4:26 am

Shellface wrote:@Stalker:
…How did you get those numbers? The radii listed are in RJ, and with the conversion RJ = 10.97 R, I get radii consistent with those listed here for all of the candidates (note that KOI-4036.01's radius has an error larger than its value, and I can't tell why). Also, is an equilibrium temperature of 24°c (KOI-1422.05) really too hot? (I'll give you .02 with Teq = 82°c, though)
F*** I have a mistake in my calculator... Thanks for this.

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Re: Second Kepler Science Conference Nov. 4-8

Post by Led_Zep on 7th November 2013, 12:25 pm

Link to archived videos :
http://nexsci.caltech.edu/conferences/KeplerII/agenda.shtml

It's finish for exoplanets ; Today and tomorrow it's time to talk stellar astrophysic...

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Re: Second Kepler Science Conference Nov. 4-8

Post by Led_Zep on 7th November 2013, 12:40 pm

3 other screenshots about HARPS-N :




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Re: Second Kepler Science Conference Nov. 4-8

Post by Led_Zep on 9th November 2013, 5:57 am

From archived video « New small HZ candidates from Q1-Q12
Very interesting !
Specialy for KOI-1422 : system of 5 planets (3 in HZ)
KOI-1422.04     P 63,34    R 1.20
KOI-1422.05     P 34.14    R 1.14




(click on pictures)

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Re: Second Kepler Science Conference Nov. 4-8

Post by Lazarus on 9th November 2013, 8:13 am

Shellface wrote:@Led_Zep, Lazarus
Yeah, I think that's right. It looks like that last one lies at about 3 times the critical semimajor axis, while the others are a lot closer to instability. Indeed, the last one on the list has a very long period for a Kepler detection, with an orbital period of 2.7 years(!)
KIC 7821010 planet is non-transiting, detection is through TTV. Jovian-mass object orbiting an eclipsing binary (see the Fabrycky talk "Multiple-Planet Systems: Full Architectures via TTV and TDV")

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Re: Second Kepler Science Conference Nov. 4-8

Post by Led_Zep on 11th November 2013, 9:52 am

Thanks Lazarus & Shellface

Effectively this is KIC (KID ?) 7821010 :



Another system very interesting :



Last edited by Led_Zep on 11th November 2013, 12:30 pm; edited 1 time in total

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Re: Second Kepler Science Conference Nov. 4-8

Post by Edasich on 11th November 2013, 12:23 pm

SIMBAD lists KIC 7821010 as "Algol-type binary". In any case it looks like the first circumbinary planet orbiting a bright eclipsing pair.

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Re: Second Kepler Science Conference Nov. 4-8

Post by Stalker on 14th November 2013, 7:13 am

What is the spectral type of the two components?

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Re: Second Kepler Science Conference Nov. 4-8

Post by Edasich on 14th November 2013, 10:56 am

I get roughly 6,300 K, so I guess something like a pair of F7-type stars.

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Re: Second Kepler Science Conference Nov. 4-8

Post by Stalker on 14th November 2013, 12:28 pm

OK thanks

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Re: Second Kepler Science Conference Nov. 4-8

Post by Sirius_Alpha on 15th November 2013, 12:15 am

6537±363 K and 6278±680 K for the two components is given by Armstrong et al, in pretty good agreement with Edasich.

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Re: Second Kepler Science Conference Nov. 4-8

Post by tommi59 on 16th November 2013, 8:34 am

I go back for moment to KIC12351927 b planet has a mass of 51 earth and radius 4.35 earth so quite dense planet passed unnoticed the most dense in neptune saturn range

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Re: Second Kepler Science Conference Nov. 4-8

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