{"paper":{"title":"Fluorescent H_2 Emission Lines from the Reflection Nebula NGC 7023 Observed with IGRINS","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Byeong-Gon Park, Chan Park, Daniel T. Jaffe, Gregory N. Mace, Heeyoung Oh, Huynh Anh N. Le, Hye-In Lee, In-Soo Yuk, Jae Sok Oh, Kang-Min Kim, Kyle F. Kaplan, Michael D. Pavel, Moo-Young Chun, Narae Hwang, Soojong Pak, Sungho Lee, Tae-Soo Pyo, Ueejeong Jeong, Young Chol Minh, Young S. Yu","submitted_at":"2016-09-07T03:35:45Z","abstract_excerpt":"We have analyzed the temperature, velocity and density of H2 gas in NGC 7023 with a high-resolution near-infrared spectrum of the northwestern filament of the reflection nebula. By observing NGC 7023 in the H and K bands at R ~ 45,000 with the Immersion GRating INfrared Spectrograph (IGRINS), we detected 68 H2 emission lines within the 1\" x 15\" slit. The diagnostic ratios of 2-1 S(1)/1-0 S(1) is 0.41-0.56. In addition, the estimated ortho-to-para ratios (OPR) is 1.63-1.82, indicating that the H2 emission transitions in the observed region arises mostly from gas excited by UV fluorescence. Grad"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.01818","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}