TY - GEN
T1 - Exoplanet transit spectroscopy of hot jupiters using HST/WFC3
AU - Haynes, Korey
AU - Mandell, Avi M.
AU - Sinukoff, Evan
AU - Madhusudhan, Nikku
AU - Burrows, Adam
AU - Deming, Drake
PY - 2013/6
Y1 - 2013/6
N2 - We present analysis of transit spectroscopy of three extrasolar planets, WASP-12 b, WASP-17 b, and WASP-19 b, using the Wide Field Camera 3 (WFC3) on the Hubble Space Telescope (HST). Measurement of molecular absorption in the atmospheres of these planets offers the chance to explore several outstanding questions regarding the atmospheric structure and composition of these highly irradiated, Jupiter-mass objects. We analyze the data for a single transit for each planet, using a strategy similar in certain aspects to the techniques used by Berta (2012), and achieve almost photon-limited results for individual spectral bins. Our final transit spectra are consistent with the presence of a broad absorption feature at 1.4 μm most likely due to water, but the amplitude of the absorption is less than expected based on previous observations with Spitzer, possibly due to hazes absorbing in the NIR. However, the degeneracy of models with different compositions and temperature structures combined with the low amplitude of any features in the data preclude our ability to place unambiguous constraints on the atmospheric composition without a comprehensive multi-wavelength analysis.
AB - We present analysis of transit spectroscopy of three extrasolar planets, WASP-12 b, WASP-17 b, and WASP-19 b, using the Wide Field Camera 3 (WFC3) on the Hubble Space Telescope (HST). Measurement of molecular absorption in the atmospheres of these planets offers the chance to explore several outstanding questions regarding the atmospheric structure and composition of these highly irradiated, Jupiter-mass objects. We analyze the data for a single transit for each planet, using a strategy similar in certain aspects to the techniques used by Berta (2012), and achieve almost photon-limited results for individual spectral bins. Our final transit spectra are consistent with the presence of a broad absorption feature at 1.4 μm most likely due to water, but the amplitude of the absorption is less than expected based on previous observations with Spitzer, possibly due to hazes absorbing in the NIR. However, the degeneracy of models with different compositions and temperature structures combined with the low amplitude of any features in the data preclude our ability to place unambiguous constraints on the atmospheric composition without a comprehensive multi-wavelength analysis.
KW - Stars: planetary systems
KW - Techniques: photometric
KW - Techniques: spectroscopic
KW - Transits
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U2 - 10.1017/S1743921313008533
DO - 10.1017/S1743921313008533
M3 - Conference contribution
AN - SCOPUS:84891864563
SN - 9781107045200
T3 - Proceedings of the International Astronomical Union
SP - 266
EP - 270
BT - Exploring the Formation and Evolution of Planetary Systems
PB - Cambridge University Press
ER -