Near-Infrared Transit Photometry of Extra-Solar Planet HAT-P-54b
Open Access
- 1 January 2020
- journal article
- Published by Scientific Research Publishing, Inc. in International Journal of Astronomy and Astrophysics
- Vol. 10 (02), 89-96
- https://doi.org/10.4236/ijaa.2020.102007
Abstract
The results of near-infrared photometric observations of a transit event of an extrasolar planet HAT-P-54b are presented herein. Precise near-infrared photometry was carried out using the Nayuta 2 m telescope at Nishi-Harima Astronomical Observatory, Japan and Nishi-Harima Infrared Camera (NIC). 170 J-, H-, and Ks-band images were taken in each band in 196 minutes. The flux of the planetary system was observed to decrease during the transit event. While the Ks-band transit depth is similar to that in the r-band, the J- and H-band transits are deeper than those in the Ks-band. We constructed simple models of the planetary atmosphere and found that the observed transit depths are well reproduced by inflated atmosphere containing H2S molecule.Keywords
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