{"paper":{"title":"A Gap with a Deficit of Large Grains in the protoplanetary disk around TW Hya","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Catherine Walsh, Daiki Ishimoto, Hideko Nomura, Kazuhiro D. Kanagawa, Ryohei Kawabe, Satoshi Okuzumi, Shigeru Ida, Takashi Tsukagoshi, Takayuki Muto, Tom J. Millar","submitted_at":"2016-05-01T18:40:34Z","abstract_excerpt":"We report $\\sim$3 au resolution imaging observations of the protoplanetary disk around TW Hya at 145 and 233 GHz with the Atacama Large Millimeter/Submillimeter Array. Our observations revealed two deep gaps ($\\sim$25--50 \\%) at 22 and 37~au and shallower gaps (a few \\%) at 6, 28, and 44~au, as recently reported by Andrews et al. (2016). The central hole with a radius of $\\sim3$~au was also marginally resolved. The most remarkable finding is that the spectral index $\\alpha (R)$ between bands 4 and 6 peaks at the 22~au gap. The derived power-law index of the dust opacity $\\beta (R)$ is $\\sim1.7"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.00289","kind":"arxiv","version":2},"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"}