Authors:
Zheng W., Zitrin A., Infante L., Laporte N., Huang X., Moustakas J., Ford H.C., Shu X., Wang J., Diego J.M., Bauer F.E., Iribarren P.T., Broadhurst T., Molino A.
Abstract:
We search for high-redshift dropout galaxies behind the Hubble Frontier Fields (HFF) galaxy cluster MACS J1149.5+2223, a powerful cosmic lens that has revealed a number of unique objects in its field. Using the deep images from the Hubble and Spitzer space telescopes, we find 11 galaxies at z > 7 in the MACS J1149.5+2223 cluster field, and 11 in its parallel field. The high-redshift nature of the bright z ≃ 9.6 galaxy MACS1149-JD, previously reported by Zheng et al., is further supported by non-detection in the extremely deep optical images from the HFF campaign. With the new photometry, the best photometric redshift solution for MACS1149-JD reduces slightly to z = 9.44 ± 0.12. The young galaxy has an estimated stellar mass of , and was formed at when the universe was ≈300 Myr old. Data available for the first four HFF clusters have already enabled us to find faint galaxies to an intrinsic magnitude of , approximately a factor of 10 deeper than the parallel fields. © 2017. The American Astronomical Society. All rights reserved.
URL:
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85014345394&doi=10.3847%2f1538-4357%2faa5d55&partnerID=40&md5=dd9de9a016d3da046ffc571c4db2f9f1
Keywords:
cosmology: observations; galaxies: clusters: individual (MACS J1149.5+2223); galaxies: highredshift; gravitational lensing: strong