Spitzer/IRAC Limits on the Mass of Fomalhaut and Epsilon Eridani Planetary Companions

Details Spitzer/IRAC Limits on the Mass of Fomalhaut and Epsilon Eridani Planetary Companions Spitzer/IRAC Limits on the Mass of Fomalhaut and Epsilon Eridani Planetary Companions

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21542320m&link_type=abstract

American Astronomical Society, AAS Meeting #215, #423.20; Bulletin of the American Astronomical Society, Vol. 42, p.329

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Scientific paper

We report on our Spitzer/IRAC ongoing search for planetary companions of nearby stars hosting exoplanets and/or debris disks. With its high sensitivity and stable point spread function, IRAC is uniquely capable of detecting cool, Jupiter-like planetary companions whose peak of emission is predicted to occur near 4.5 micron. By carefully sampling and subtracting the light diffracted from the bright central star, we can search for the faint emission of planets with typical orbital separation of 50 AU, or larger. By applying these techniques we derived a 3 sigma model-dependent mass upper limit of 3MJ for the recently discovered Fomalhaut b planet. We also derived limits of 4 and <1 MJ for the presence of planets at the inner and outer edge of the epsilon Eridani submillimeter ring. More targets are being currently analyzed, with the goal to quantify the occurrence of planetary mass companions at large orbital separations, and to study their effects on other planets and debris disks in extrasolar planetary systems.
This work is based on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under NASA contract 1407.

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