@inproceedings{oai:jaxa.repo.nii.ac.jp:00003136, author = {木村, 智幸 and 尾中, 敬 and 左近, 樹 and 下西, 隆 and Kimura, Tomoyuki and Onaka, Takashi and Sakon, Itsuki and Shimonishi, Takashi}, book = {宇宙航空研究開発機構特別資料, JAXA Special Publication: The Cosmic Wheel and the Legacy of the AKARI archive: from galaxies and stars to planets and life}, month = {Mar}, note = {第4回「あかり」国際会議 (2017年10月17-20日. 東京大学), 文京区, 東京, The 4th AKARI International Conference: The Cosmic Wheel and the Legacy of the AKARI archive: from galaxies and stars to planets and life (October 17-20, 2017. The University of Tokyo), Bunkyo-ku, Tokyo, Japan, We serendipitously discovered two young stellar object (YSO) candidates using the slit-less spectroscopic mode of the InfraRed Camera (IRC) on board AKARI. They are not associated with any known star-forming regions in the Galactic plane. Absorption bands of molecular species, including solid phase H2O, CO2, CO, and possibly gas phase CO, are seen in the spectra of both sources. In one of the sources, absorption bands of crystalline H2O, XCN, organics, and silicates are also seen. These results suggest that the objects are highly embedded class I YSOs or class II YSOs with an edge-on disk. However, their bluer color than typical YSOs and non-detection at far-infrared are not reconciled with expected spectral energy distributions of YSOs. Confirmation of these objects as YSOs will have a significant impact on the YSO study because it will suggest that a number of YSOs may have eluded detection in past infrared photometric surveys and could renew the census of YSOs on a galactic scale and their evolutionary tracks. The constraint of the properties of warm CO gas from high resolution spectroscopy in the M-band is crucial to reveal the true nature of the objects., 形態: カラー図版あり, Physical characteristics: Original contains color illustrations, 資料番号: AA1730026062, レポート番号: JAXA-SP-17-009E}, pages = {321--324}, publisher = {宇宙航空研究開発機構(JAXA), Japan Aerospace Exploration Agency (JAXA)}, title = {Analysis of Ice Absorption Features toward YSO Candidates using AKARI}, volume = {JAXA-SP-17-009E}, year = {2018} }