KOI-368: 110-day M dwarf in a low-e, misaligned orbit

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KOI-368: 110-day M dwarf in a low-e, misaligned orbit

Post by Sirius_Alpha on 9th July 2013, 8:41 pm

A highly inclined orbit for the 110-day period planet candidate KOI-368.01
http://arxiv.org/abs/1307.2249

We report the detection of asymmetry in the transit light curves of the 110-day period planet candidate KOI-368.01, orbiting a rapidly rotating A-dwarf. The significant distortion in the transit light curve is attributed to spin-orbit misalignment between the transiting companion and the gravity darkened host star. Our analysis was based on 11 Long Cadence and 2 Short Cadence transits of KOI-368.01 from the Kepler mission, as well as stellar parameters determined from our follow-up spectroscopic observation. We measure the true obliquity between the orbit normal and the stellar rotation axis to be 64 +11/-9 degrees. The orbital eccentricity is also constrained by the transit duration to be e=0.07 +0.18/-0.07. The long period, high obliquity, and potentially low eccentricity of KOI-368.01 makes it unique amongst systems with spin-orbit measurements, and appears to be incompatible with Kozai migration mechanisms involving wide stellar mass binaries.


Last edited by Sirius_Alpha on 11th August 2013, 6:32 am; edited 1 time in total

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Re: KOI-368: 110-day M dwarf in a low-e, misaligned orbit

Post by Stalker on 10th July 2013, 1:07 am

"confirmed" candidate?

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Re: KOI-368: 110-day M dwarf in a low-e, misaligned orbit

Post by Lazarus on 10th July 2013, 1:08 am

Exoplanetary equivalent of 2004 XR190? Razz
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Re: KOI-368: 110-day M dwarf in a low-e, misaligned orbit

Post by Sirius_Alpha on 11th August 2013, 6:32 am

The companion is an M dwarf.

A highly inclined orbit for the 110-day period M-dwarf companion KOI-368.01
http://arxiv.org/abs/1307.2249 (v2)

Thread title changed accordingly.

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Re: KOI-368: 110-day M dwarf in a low-e, misaligned orbit

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