{"paper":{"title":"Short Lifetime of Protoplanetary Disks in Low-metallicity Environments","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Alan T. Tokunaga, Chihiro Tokoku, Chikako Yasui, Masao Saito, Naoto Kobayashi","submitted_at":"2010-10-08T11:49:58Z","abstract_excerpt":"We studied near-infrared disk fractions of six young clusters in the low-metallicity environments with [O/H$] \\sim -0.7$ using deep $JHK$ images with Subaru 8.2\\,m telescope. We found that disk fraction of the low-metallicity clusters declines rapidly in $<$1\\,Myr, which is much faster than the $\\sim$5--7\\,Myr observed for the solar-metallicity clusters, suggesting that disk lifetime shortens with decreasing metallicity possibly with an $\\sim$$10^Z$ dependence. Since the shorter disk lifetime reduces the time available for planet formation, this could be one of the major reasons for the strong"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1010.1668","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"}