Near-Infrared Transit Photometry of Extra-Solar Planet HAT-P-54b  

作　　者：Haruka Tabata Yoichi Itoh Haruka Tabata;Yoichi Itoh(Nishi-Harima Astronomical Observatory, Center for Astronomy, University of Hyogo, Hyogo, Japan)

机构地区：[1]Nishi-Harima Astronomical Observatory, Center for Astronomy, University of Hyogo, Hyogo, Japan

出　　处：《International Journal of Astronomy and Astrophysics》2020年第2期89-96,共8页天文学与天体物理学国际期刊（英文）

摘　　要：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 <em>J-</em>, <em>H-</em>, and <em>Ks</em>-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 <em>Ks</em>-band transit depth is similar to that in the <em>r</em>-band, the<em> J</em>- and <em>H</em>-band transits are deeper than those in the <em>Ks</em>-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.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 <em>J-</em>, <em>H-</em>, and <em>Ks</em>-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 <em>Ks</em>-band transit depth is similar to that in the <em>r</em>-band, the<em> J</em>- and <em>H</em>-band transits are deeper than those in the <em>Ks</em>-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.

关 键 词：Planetary Systems Infrared: Planetary Systems 

分 类 号：P14[天文地球—天体物理]