Spectra and Diagnostics for the Direct Detection of Wide-Separation Extrasolar Giant Planets

Details Spectra and Diagnostics for the Direct Detection of Wide-Separation Extrasolar Giant Planets Spectra and Diagnostics for the Direct Detection of Wide-Separation Extrasolar Giant Planets

2004-01-24

arxiv.org/abs/astro-ph/0401522v1

Astrophys.J. 609 (2004) 407-416

Astronomy and Astrophysics

Astrophysics

submitted to the Astrophysical Journal, 19 pages, 11 color figures

Scientific paper

10.1086/420974

We calculate as a function of orbital distance, mass, and age the theoretical spectra and orbit-averaged planet/star flux ratios for representative wide-separation extrasolar giant planets (EGPs) in the optical, near-infrared, and mid-infrared. Stellar irradiation of the planet's atmosphere and the effects of water and ammonia clouds are incorporated and handled in a consistent fashion. We include predictions for 12 specific known EGPs. In the process, we derive physical diagnostics that can inform the direct EGP detection and remote sensing programs now being planned or proposed. Furthermore, we calculate the effects of irradiation on the spectra of a representative companion brown dwarf as a function of orbital distance.

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