FIRST FRONTIER FIELD CONSTRAINTS ON THE COSMIC STAR FORMATION RATE DENSITY AT z similar to 10-THE IMPACT OF LENSING SHEAR ON COMPLETENESS OF HIGH-REDSHIFT GALAXY SAMPLES
PA Oesch, RJ Bouwens, GD Illingworth, M Franx, SM Ammons, PG van Dokkum, M Trenti, I Labbe
The Astrophysical Journal | IOP PUBLISHING LTD | Published : 2015
We search the complete Hubble Frontier Field data set of Abell 2744 and its parallel field for z ∼ 10 sources to further refine the evolution of the cosmic star formation rate density (SFRD) between z ∼ 8 and z ∼ 10. We independently confirm two images of the recently discovered triply imaged z ∼ 9.8 source by Zitrin et al. and set an upper limit for similar z ∼ 10 galaxies with red colors of J - H 1.2 in the parallel field of Abell 2744. We utilize extensive simulations to derive the effective selection volume of Lyman-break galaxies at z ∼ 10, both in the lensed cluster field and in the adjacent parallel field. Particular care is taken to include position-dependent lensing shear to accur..View full abstract
Awarded by NASA
We thank the anonymous referee for very helpful feedback and suggestions, which greatly improved this paper. This work was supported by NASA grant NAG5-7697 and NASA grant HST-GO-11563.01. We are grateful to the directors of STScI and SSC to execute the dedicated Frontier Field program. We thank Shy Genel and Mark Vogelsberger for providing and discussing the results of the Illustris simulation. This work utilizes gravitational lensing models produced by PIs Bradac, Ebeling, Merten & Zitrin, Sharon, and Williams funded as part of the HST Frontier Fields program conducted by STScI. STScI is operated by the Association of Universities for Research in Astronomy, Inc. under NASA contract NAS 5-26555. The lens models and data sets were obtained from the Mikulski Archive for Space Telescopes (MAST).