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Young galaxy candidates in the hubble frontier fields

Otros títulosIV. MACS J1149.5+2223
AutorZheng, Wei; Zitrin, Adi; Infante, Leopoldo; Laporte, Nicolas; Huang, Xingxing; Moustakas, John; Ford, Holland C.; Shu, Xinwen; Wang, J.; Diego, José María ; Bauer, F. E.; Troncoso Iribarren, P.; Broadhurst, T.; Molino, Alberto
Fecha de publicación2017
EditorInstitute of Physics Publishing
CitaciónAstrophysical Journal 836(2): 210 (2017)
ResumenWe 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.
Versión del editorhttps://doi.org/10.3847/1538-4357/aa5d55
Identificadoresdoi: 10.3847/1538-4357/aa5d55
e-issn: 1538-4357
issn: 0004-637X
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