{"paper":{"title":"Diffraction-limited 3 um Spectroscopy of IRAS 04296+3429 and IRAS 05341+0852: Spatial Extent of Hydrocarbon Dust Emission and Dust Evolutionary Sequence","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"(2) U. of Hong Kong, (3) Subaru Telescope, (4) NAOJ, (5) U. of Tokyo, (6) U. de Montr\\'eal), D. Saint-Jacques (6), H. Takami (3), H. Terada (3), K. Nedachi (3), M. Goto (1), M. Hayashi (3), Mitaka, M. Iye (4), N. Kobayashi (5), N. Takato (3), S. Oya (3), Sun Kwok (2), Th. Henning (1) ((1) MPIA, T. Kanzawa (3), T.-S. Pyo (3), W. Gaessler (1), Y. Hayano (3), Y. Kamata (4), Y. Minowa (5)","submitted_at":"2006-11-29T21:00:05Z","abstract_excerpt":"We present 3 um spectroscopy of the carbon-rich proto-planetary nebulae IRAS 04296+3429 and IRAS 05341+0852 conducted with the adaptive optics system at the Subaru Telescope. We utilize the nearly diffraction-limited spectroscopy to probe the spatial extent of the hydrocarbon dust emitting zone. We find a hydrocarbon emission core extending up to 100--160 mas from the center of IRAS 04296+3429, corresponding to a physical diameter of 400--640 AU, assuming a distance of 4 kpc. On the other hand, we find that IRAS 05341+0852 is not spatially resolved with this instrumentation. The physical exten"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0611916","kind":"arxiv","version":1},"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"}