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Young Galaxy Candidates in the Hubble Frontier Fields. IV. MACS J1149.5+2223.
- Source :
- Astrophysical Journal; 2/20/2017, Vol. 836 Issue 2, p1-1, 1p
- Publication Year :
- 2017
-
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. [ABSTRACT FROM AUTHOR]
- Subjects :
- GALAXY clusters
GALACTIC dynamics
METAPHYSICAL cosmology
INTERSTELLAR medium
Subjects
Details
- Language :
- English
- ISSN :
- 0004637X
- Volume :
- 836
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Astrophysical Journal
- Publication Type :
- Academic Journal
- Accession number :
- 121466119
- Full Text :
- https://doi.org/10.3847/1538-4357/aa5d55