@inproceedings{oai:jaxa.repo.nii.ac.jp:00003023, author = {Seok, Ji-Yeon and Kemper, Francisca and Hony, Sacha and Madden, Suzanne and Galliano, Frederic and Gordon, Karl and Indebetouw, Remy and Lebouteiller, Vianney}, book = {宇宙航空研究開発機構特別資料, JAXA Special Publication: Proceedings of the SPICA Science Conference from Exoplanets to Distant Galaxies: SPICA's New Window on the Cool Universe}, month = {Mar}, note = {SPICA Science Conference from Exoplanets to Distant Galaxies: SPICA's New Window on the Cool Universe (June 18-21, 2013. Ito Hall, the University of Tokyo), Bunkyou-ku, Tokyo, Japan, Polycyclic aromatic hydrocarbons (PAHs) are some of the important components of the interstellar medium being both abundant and ubiquitous. We present the preliminary results on PAH emission in HII regions in the Large Magellanic Cloud using the spectroscopic data taken by Infrared Spectrograph (IRS; 5-38 μm), a part of the SAGE-Spec Spitzer Legacy program. The SAGE-Spec program provides the IRS mapping data of ten HII regions combining them with the archival data of 30 Dor. Among the eleven HII regions, an exemplary spectrum of an HII region (LHA 120-N 11: DEM L34) is presented. The integrated spectrum shows prominent PAH features at 6.2, 7 to 9, and 11.3 μm as well as a weak PAH feature at 12.7 μm. Several ionic lines such as [S IV] 10.51, [Ne II] 12. 81, and [Ne III] 15.56 μm, are also detected, which probe the ionization and/or density of the gas. PAH band ratios are examined over the region, and we investigate the correlation between the band ratios and the radiation field strength. Finally, we propose how the nature of PAHs and their correlation to the local environment can be extensively explored by SPICA., 形態: カラー図版あり, Physical characteristics: Original contains color illustrations, 資料番号: AA1730027046, レポート番号: JAXA-SP-17-010E}, pages = {215--218}, publisher = {宇宙航空研究開発機構(JAXA), Japan Aerospace Exploration Agency (JAXA)}, title = {PAH Emission from HII Regions in the SAGE-spec Spitzer Program}, volume = {JAXA-SP-17-010E}, year = {2018} }