Preliminary Results From The NASA EPOXI Mission

Details Preliminary Results From The NASA EPOXI Mission Preliminary Results From The NASA EPOXI Mission

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008dps....40.0102b&link_type=abstract

American Astronomical Society, DPS meeting #40, #1.02; Bulletin of the American Astronomical Society, Vol. 40, p.385

Astronomy and Astrophysics

Astronomy

Scientific paper

EPOXI (EPOCh + DIXI) is a NASA Discovery Program Mission of Opportunity using the Deep Impact flyby spacecraft. From January through August 2008, the EPOCh (Extrasolar Planet Observation and Characterization) Science Investigation used the HRI camera to gather precise, rapid cadence photometric time series of stars with known exoplanets in edge-on orbits. One of the EPOCh science goals is a search for additional planets at larger orbital radii in these systems. Such planets would be revealed either through the variations they induce on the times of transit of the known exoplanet in front of the parent star, or directly through the photometric transit of the second planet itself. I will describe our techniques for searching for additional planets orbiting the EPOCh targets, and for placing limits on their physical sizes. This search is especially interesting in the case of the GJ 436 system, since the eccentricity of the known Neptune-mass planet may point to the presence of a second planetary companion. Using our EPOCh observations for this system, we have the sensitivity to detect a planet as small as the Earth, even if the planet produces only a single transit event.

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