{"paper":{"title":"Star Formation at z~6: i-dropouts in the ACS GTO fields","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A.R. Martel, C. Gronwall, C.J. Burrows, C. Lidman, D.A. Golimowski, D. Magee, D.R. Ardila, E.S. Cheng, F. Bartko, F. Menanteau, G.D. Illingworth, G.F. Hartig, G.K. Miley, G.R. Meurer, H.C. Ford, H.D. Tran, J.E. Krist, J.P. Blakeslee, L. Infante, M. Clampin, M. Franx, M.P. Lesser, M. Postman, M. Sirianni, N. Benitez, N.J.G. Cross, P.D. Feldman, P. Rosati, R.A. Brown, R.A. Kimble, R.J. Bouwens, R.L. White & W. Zheng, T. Broadhurst, W.B. Sparks, Z.I. Tsvetanov","submitted_at":"2003-06-11T19:51:21Z","abstract_excerpt":"Using an i-z dropout criterion, we determine the space density of z~6 galaxies from two deep ACS GTO fields with deep optical-IR imaging. A total of 23 objects are found over 46 arcmin^2, or ~0.5 objects/arcmin^2 down to z~27.3 (6 sigma; all AB mag) (including one probable z~6 AGN). Combining deep ISAAC data for our RDCS1252-2927 field (J~25.7 and Ks~25.0 (5 sigma)) and NICMOS data for the HDF North (JH~27.3 (5 sigma)), we verify that these dropouts have flat spectral slopes. i-dropouts in our sample range in luminosity from ~1.5 L* (z~25.6) to ~0.3 L* (z~27.3) with the exception of one very b"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0306215","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/0306215/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"}