Zheng, W;
Zitrin, A;
Infante, L;
Laporte, N;
Huang, X;
Moustakas, J;
Ford, HC;
... Molino, A; + view all
(2017)
Young Galaxy Candidates in the Hubble Frontier Fields. IV. MACS J1149.5+2223.
Astrophysical Journal
, 836
(2)
, Article 210. 10.3847/1538-4357/aa5d55.
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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 sime 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 (7\pm 2)\times {10}^{8}\,{M}_{\odot }, and was formed at $z={13.2}_{-1.6}^{+1.9} 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 {M}_{{UV}}\simeq -15.5, approximately a factor of 10 deeper than the parallel fields.
| Type: | Article |
|---|---|
| Title: | Young Galaxy Candidates in the Hubble Frontier Fields. IV. MACS J1149.5+2223 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.3847/1538-4357/aa5d55 |
| Publisher version: | http://doi.org/10.3847/1538-4357/aa5d55 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Cosmology: observations, galaxies: clusters: individual (MACS J1149.5+2223), galaxies: high red shift, gravitational lensing: strong |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1559492 |
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