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26 April 2024 |
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Precise Strong Lensing Mass Modeling of Four Hubble Frontier Fields Clusters and a Sample of Magnified High-Redshift Galaxies | | Ryota Kawamata
; Masamune Oguri
; Masafumi Ishigaki
; Kazuhiro Shimasaku
; Masami Ouchi
; | | Date: |
21 Oct 2015 | | Abstract: | We conduct precise strong lensing mass modeling of four ${it Hubble}$
Frontier Fields (HFF) clusters, Abell$~$2744, MACS$~$J0416.1$-$2403,
MACS$~$J0717.5$+$3745, and MACS$~$J1149.6$+$2223, for which HFF imaging
observations are completed. We construct a refined sample of more than 100
multiple images for each cluster by taking advantage of the full depth HFF
images, and conduct mass modeling using the ${small
m GLAFIC}$ software,
which assumes simply parametrized mass distributions. Our mass modeling also
exploits a magnification constraint from the lensed Type Ia supernova HFF14Tom
for Abell$~$2744 and positional constraints from multiple images of the lensed
supernova SN Refsdal for MACS$~$J1149.6$+$2223. We find that our best-fitting
mass models reproduce the observed image positions with RMS errors of $sim
0.4$ arcsec, which are smaller than RMS errors in previous mass modeling that
adopted similar numbers of multiple images. We then construct catalogs of
$zsim 6-9$ dropout galaxies behind the four clusters and estimate
magnification factors for these dropout galaxies with our best-fitting mass
models. The dropout sample from the four cluster fields contains $sim 120$
galaxies at $zgtrsim 6$, about 20 of which are predicted to be magnified by a
factor of more than 10. Some of the high-redshift galaxies detected in the HFF
have lensing-corrected magnitudes of $M_{
m UV}sim -15$ to $-14$. Our
analysis demonstrates that the HFF data indeed offer an ideal opportunity to
study faint high-redshift galaxies. All lensing maps produced from our mass
modeling will be made available on the STScI website. | | Source: | arXiv, 1510.6400 | | Services: | Forum | Review | PDF | Favorites | |
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