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 We study the origin of the [O I] 63, [N II] 122, [O I] 145, and [C II] 158 line deficits in z less than 0.3 Ultraluminous Infrared Galaxies, using data from Herschel. The line deficits are consistent with arising from increased quantities of dust in HII regions, but part of the [C II] deficit may arise from an additional mechanism, plausibly increased grain charging. We briefly discuss some implications from these results for SPICA. 形態: カラー図版あり Physical characteristics: Original contains color illustrations 資料番号: AA1730027025 レポート番号: JAXA-SP-17-010E