Title

High-resolution spectroscopic search for the thermal emission of the extrasolar planet HD 217107 b

Authors

Authors

P. E. Cubillos; P. Rojo;J. J. Fortney

Comments

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Abbreviated Journal Title

Astron. Astrophys.

Keywords

planets and satellites: detection; techniques: spectroscopic; stars:; individual: HD 217107; MASS DWARF STARS; GIANT PLANETS; ATMOSPHERIC CHEMISTRY; BROWN DWARFS; HOT JUPITERS; TAU-BOOTIS; SYSTEMS; COMPANIONS; STARLIGHT; SPECTRUM; Astronomy & Astrophysics

Abstract

We analyzed the combined near-infrared spectrum of a star-planet system with thermal emission atmospheric models, based on the composition and physical parameters of the system. The main objective of this work is to obtain the inclination of the orbit, the mass of the exoplanet, and the planet-to-star flux ratio. We present the results of our routines on the planetary system HD 217107, which was observed with the high-resolution spectrograph Phoenix at 2.14 mu m. We revisited and tuned a correlation method to directly search for the high-resolution signature of a known non-transiting extrasolar planet. We could not detect the planet with our current data, but we present sensitivity estimates of our method and the respective constraints on the planetary parameters. With a confidence level of 3-sigma we constrain the HD 217107 b planet-to-star flux ratio to be less than 5 x 10(-3). We also carried out simulations on other planet candidates to assess the detectability limit of atmospheric water on realistically simulated data sets for this instrument, and we outline an optimized observational and selection strategy to increase future probabilities of success by considering the optimal observing conditions and the most suitable candidates.

Journal Title

Astronomy & Astrophysics

Volume

529

Publication Date

1-1-2011

Document Type

Article

Language

English

First Page

7

WOS Identifier

WOS:000289557200096

ISSN

0004-6361

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