The GJ 436 System: Directly Determined Exoplanetary Diameter and Fundamental Stellar Parameters

Details The GJ 436 System: Directly Determined Exoplanetary Diameter and Fundamental Stellar Parameters The GJ 436 System: Directly Determined Exoplanetary Diameter and Fundamental Stellar Parameters

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21821803v&link_type=abstract

American Astronomical Society, AAS Meeting #218, #218.03; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

GJ 436 is a nearby M dwarf hosting a transiting Neptune-mass exoplanet in a 2.6 day orbit. We use the CHARA interferometric array to determine the stellar angular diameter. Coupled with trigonometric parallax values and literature photometry, we obtain direct estimates of the stellar physical size and surface temperature (through spectral energy distribution fitting). Finally, literature measurements of the depth of transit provide a direct estimate of the planetary diameter. We discuss how our empirical results and related consequences compare with previously published values of the stellar and planetary parameters of the GJ 436 system.

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