HAT-P-1: A Direct Glimpse into the Atmophere of a Hot Jupiter

Details HAT-P-1: A Direct Glimpse into the Atmophere of a Hot Jupiter HAT-P-1: A Direct Glimpse into the Atmophere of a Hot Jupiter

Jul 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006hst..prop11069h&link_type=abstract

HST Proposal ID #11069. Cycle 15

Computer Science

Scientific paper

The HATNet project has just discovered a transiting planet that is an extremely promising target for reflected light observations Bakos et al. 2006. HAT-P-1, with orbital period P_orb = 4.46529 days, mass M_p=0.53 +/- 0.04 M_Jup, and radius R_p=1.38 +/- 0.10 R_Jup, has a density that is even lower than that of the anomalous case of HD 209458b. Its large size and small semimajor axis enhance the fraction of stellar flux it reflects. Furthermore, HAT-P-1 orbits one component of a wide binary ADS 16402A and ADS 16402B are G0V stars with 11.2" at 1.39 pc, making this an ideal target for ultra-precise differential photometry. Therefore, we propose ACS/HRC slitless grism photometry near times of its secondary eclipse to make the first detection of reflected light from an extrasolar planet. Holman and Bakos are co-PIs on this proposal.

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