Science

discussion

KID 7906827

Started by ted91
Default_user
over 5 years ago

KID 7906827 - period: 737.1 days

Transit in Q8 at 772.2 BJD:

Transit in Q16 at 1509.3 BJD:

Default_user
over 5 years ago

KID 7906827 is also mentioned over here: http://talk.planethunters.org/discussions/DPH101ovi0?page=4&per_page=10

Default_user
over 5 years ago

SkyView

Image size 0.02 degrees

Default_user
about 5 years ago

I am just curious, why KID 7906827 didn't make it into the recent paper?

Transits have reasonably good U-shape,same depth (IMHO) ,no visible APOs seen, no obvious secondary eclipse observed (I don't think that dip @924.01 BJD qualify as one), both visible in SAP_Flux, not on the TCE list ( EB explanation is still possible )

Perhaps this could be ~8 Re planet at ~1,4AU with T = 185 and 737d period ?

ukirt

Transit profile

plot

LC

LC

Default_user
about 5 years ago

I suspect this particular candidate may be included in an upcoming publication, along with other single and double transit light curves.

From PH6:

Planet Hunters continue to collect one and two transit systems, and these will be further explored in a future paper, Picard et al. (2013, in preparation).

Default_user
about 5 years ago

I've done a rough transit fit with eccentricity constrained to zero:

FULL

From the SDSS griz data using Charbonneau, I get a stellar radius of 1.089x Sol (the KIC value is 0.934x Sol). However, the KIC value is too small for the duration of the transits. From transit fitting, I get a radius of 1.07x Sol:

FULL

UPDATE: fixed the stellar radius as I misread a value. On the planet, I get a radius of 8.26x Re at 1.65AU with a Teff of 211K

Default_user
over 3 years ago

Yes, still looks like a good PC with two matching transits after detrending:

P1

Default_user
over 3 years ago

I have very similar results for this pair of transits on: KID 7906827

P=757.153 days, 8x R_E, AU=1.65, T Dur = 19.125 hrs, effective temperature approx 211K. At -80 degrees Fahrenheit it comes up a bit cold, however being such a large planet it could have extensive internal heating sources, atmospheric, and gravitational structure.

This planet potentially has a radius almost as large as our own solar systems (Jupitor, P= 4336 days, AU= 5.2)

but could be slightly more hospitable.

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