Kepler 4b - 8b: First Planets from Kepler

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Re: Kepler 4b - 8b: First Planets from Kepler

Post by Edasich on 7th January 2010, 5:30 pm

Well, notable thing is that Kepler has already come up with 5 planetary candidates and with exhaustive informations too.

CoRoT seems to keep its candidates in great secret and with announcement rate of 1/2 planet per year.

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Re: Kepler 4b - 8b: First Planets from Kepler

Post by Sirius_Alpha on 8th January 2010, 7:28 pm

Edasich wrote:CoRoT seems to keep its candidates in great secret and with announcement rate of 1/2 planet per year.
CoRoT was launched on 27 Dec, 2006. So it's been up for ~3 years. 7 planets per 3 years = 7/3 = ~2.333... planets per year, not 1/2 = 0.5 planets per year.
If Kepler produces 5 planets per 45 days. We can expect 40 per year. IIRC, they will announce their planet catches every six months.


Edit:
http://kepler.nasa.gov/Mission/tableofdiscoveries/ .... Gah! It's gone!

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Re: Kepler 4b - 8b: First Planets from Kepler

Post by Sirius_Alpha on 20th April 2010, 11:43 pm

Independent study of the Kepler planets.
http://arxiv.org/abs/1004.3538


Secondary eclipse of Kepler-7b is detected to 3.5-sigma confidence with depth (F_pd/F_*) = 47 +/- 14 ppm, indicative of a geometric albedo of A_g = (0.38 +/- 12).

Significant orbital eccentricity is detected for the Neptune-mass planet Kepler-4b to 3.0-sigma confidence, with an eccentricity of e = (0.19 +/- 0.1).

A weak 2.3-sigma detected of the secondary eclipse of Kepler-5 is made with a depth of (24 +/- 14) ppm, for which the most plausible explanation is reflected light due to a geometric albedo of A_g = 0.18 +/- 0.09.

A 2.6-significance peak in the TTV periodogram of Kepler-6 is detected, which is not easily explained as an alias frequency. Perturbing planets and exomoons are unlikely to be responsible either and currently our favoured hypothesis is one of stellar rotation.

We derive significantly different impact parameters for all the Kepler planets except Kepler-7.

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temp

Post by Lazarus on 21st April 2010, 2:41 pm

An interesting illustration of the dependence of parameters on the fitting models there. Also notable for deriving distances to Kepler-5, 6 and 7 which was not done in the original discovery papers.

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