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

• 作者: Yoichi Itoh
• 来源期刊: 天文学与天体物理学国际期刊(英文)
• 学科: 地球科学
• 关键词: Planetary Systems Infrared: Planetary Systems
• 年，卷（期）: 2020,（2）
• 页码范围: 89-96
• 页数: 8页
• 分类号: P14

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.