Updated Gliese 436 b data

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Updated Gliese 436 b data

Post by Sirius_Alpha on 6th June 2008, 1:31 pm

The Hubble Space Telescope observed Gliese 436 for a few transits, and we now have revised parameters.

m/sin i 0.072 MJ
Semi-major axis0.02872 AU
Orbital Period2.643904 days
Eccentricity0.15
Omega351 deg
Radius0.438 RJ
Inclination85.8 deg

So, Gliese 436 b is a bit bigger than Neptune. Could the extra size come from tidal heating? Interactions with a second planet in the system?

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Re: Updated Gliese 436 b data

Post by Edasich on 14th June 2008, 8:39 am

However the Super-Earth "c" has been disproven. It was too unstable to me.

As Lazarus once stated (and I agree) a 51 day periodicity observed with Systemic should be more significant.
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Re: Updated Gliese 436 b data

Post by Edasich on 23rd June 2008, 4:29 am

Here is comes again. Alternative models for 2-planets fit:

http://fr.arxiv.org/abs/0806.3270
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Re: Updated Gliese 436 b data

Post by Lazarus on 3rd July 2008, 7:09 pm

Title: The case for a close-in perturber to GJ 436 b - this one from the same people who proposed the 5-day planet in the first place.
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Re: Updated Gliese 436 b data

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