HAT-P-13: effect of third companion on interior structure determination

dF star Number of posts : 3337 Registration date : 2008-06-12

Wasn't sure whether this is more a planetology or a mechanics topic...

Becker & Batygin, Dynamical Measurements of the Interior Structure of Exoplanets
http://arxiv.org/abs/1309.5363

Looks at the question of whether the third companion HAT-P-13 "d" will affect the interior structure determination for the innermost planet. Looks like it won't.

Their figure 5 seems to suggest the third object must lie between about 3 and 30 AU. Using the mass/semimajor axis relationship, I get a range of 0.9 to 90 Jupiter masses.

» Constraints on the interior structure of HAT-P-13 b
» Astrometric determination of exoplanet masses.
» Orbit determination through transit timing?
» Structure and composition of the Beta Pictoris disc
» A ring-like structure around G 196-3 B