Other
Scientific paper
Mar 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sptz.prop50624h&link_type=abstract
Spitzer Proposal ID #50624
Other
Scientific paper
We propose an observation of the planet+star system upsilon Andromdae, with the aim of measuring an accurate phase curve for the closest planet in the system. Based on the radial velocity ephemeris and previous Spitzer pilot program, we tailor our program to address two principal scientific goals. The bulk of the observation consists of an extended observation to resolve and characterise the shape of the lightcurve near maximum brightness, with the goal of mapping the temperature distribution on the day-side face of the planet. In addition, we request several shorter exposures over the course of a single planetary orbital period, in order to accurately measure the amplitude of the phase variation and thereby constrain the day-night temperature contrast of the planet. Upsilon Andromedae b represents the archetype for a class of planet in which the high level of irradiation results in a hot day side and cold night side. This stands in contrast to another well characterised hot Jupiter system which seems to have little difference in day/night temperature contrast. By placing the archetypes of these two classes on an equal footing in terms of detail, our observations will help to elucidate and understand the difference in the two classes.
Cho James
Deming Drake
Hansen Bradley
Harrington Joseph
Menou Kristen
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