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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



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ID: 660613.0, MPI für Astronomie / Publikationen_mpia
Structural parameters of galaxies in CANDELS
Authors:van der Wel, A.; Bell, E. F.; Häussler, B.; McGrath, E. J.; Chang, Yu-Yen; Guo, Yicheng; McIntosh, D. H.; Rix, H.-W.; Barden, M.; Cheung, E.; Faber, S. M.; Ferguson, H. C.; Galametz, A.; Grogin, N. A.; Hartley, W.; Kartaltepe, J. S.; Kocevski, D. D.; Koekemoer, A. M.; Lotz, J.; Mozena, M.; Peth, M. A.; Peng, Chien Y.
Date of Publication (YYYY-MM-DD):2012
Title of Journal:The Astrophysical Journal Supplement Series
Volume:203
Issue / Number:2
Start Page:id.24
Review Status:not specified
Audience:Not Specified
Abstract / Description:We present global structural parameter measurements of 109,533 unique, H F160W-selected objects from the CANDELS multi-cycle treasury program. Sérsic model fits for these objects are produced with GALFIT in all available near-infrared filters (H F160W, J F125W and, for a subset, Y F105W). The parameters of the best-fitting Sérsic models (total magnitude, half-light radius, Sérsic index, axis ratio, and position angle) are made public, along with newly constructed point-spread functions for each field and filter. Random uncertainties in the measured parameters are estimated for each individual object based on a comparison between multiple, independent measurements of the same set of objects. To quantify systematic uncertainties, we create a mosaic with simulated galaxy images with a realistic distribution of input parameters and then process and analyze the mosaic in an identical manner as the real data. We find that accurate and precise measurements—to 10% or better—of all structural parameters can typically be obtained for galaxies with H F160W < 23, with comparable fidelity for basic size and shape measurements for galaxies to H F160W ~ 24.5.
Free Keywords:catalogs; galaxies: high-redshift; galaxies: statistics; galaxies: structure; surveys
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://cdsads.u-strasbg.fr/abs/2012ApJS..203...24V [ID No:1]
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