日本地球惑星科学連合2018年大会

講演情報

[JJ] ポスター発表

セッション記号 P (宇宙惑星科学) » P-CG 宇宙惑星科学複合領域・一般

[P-CG22] アルマによる惑星科学の新展開

2018年5月23日(水) 15:30 〜 17:00 ポスター会場 (幕張メッセ国際展示場 7ホール)

コンビーナ:武藤 恭之(工学院大学 教育推進機構)、百瀬 宗武(茨城大学理学部)、佐川 英夫(京都産業大学理学部、共同)、下条 圭美(国立天文台チリ観測所)

[PCG22-P05] On the spatial distribution of Neptune's stratospheric HCN obtained with ALMA

*飯野 孝浩1佐川 英夫2塚越 崇3 (1.東京農工大学科学博物館、2.京都産業大学、3.茨城大学)

キーワード:アルマ、惑星大気、海王星

We present spatially resolved hydrogen cyanide (HCN) (J=4--3) molecular emission spectra and its three-dimensitonal distribution in the Neptune's stratosphere.
We analyzed a data obtained from the archive of the Atacama Large Millimeter-submillimeter Array (ALMA) observed with a band-7 receiver(Project ID: 2015.1.01471.S).
Synthesized beam size was 0.42 x 0.38 arcsec, synthesized beam is fine enough to resolve Neptune's 2.24 arcsec diameter disk.
The integrated intensity map of HCN shows a latitudinal gradient that has highest and lowest peak at the equator and 60S, respectively.
Radiative transfer analysis showed that column densities measures at the equator shows 1.5 times higher value than that of measured at 60S.
The derived HCN spatial distribution is consistent with the previously proposed stratospheric global circulation, which has upwelling and downwelling at 60S and the equator, respectively.