The massive galaxy cluster El Gordo ($z=0.87$) imprints multitudes of
gravitationally lensed arcs onto James Webb Space Telescope (JWST)
Near-Infrared Camera (NIRCam) images. Eight bands of NIRCam imaging were
obtained in the Prime Extragalactic Areas for Reionization and Lensing Science
(PEARLS) program (GTO #1176). PSF-matched photometry across a suite of Hubble
Space Telescope (HST) and NIRCam filters gives new photometric redshifts. We
confirm 54 known image multiplicities and find two new ones and construct a
lens model based on the light-traces-mass method. The mass within 500kpc
estimated from the lens model is $\sim$$7.0\times10^14$M$_ødot$ with a
mass ratio between the southeastern and northwestern components of $\sim$unity,
similar to recent works. A statistical search for substructures recovers only
these two components, which are each tightly bound kinematically and are
separated in radial velocity by ~300 km s$^-1$. We identify a candidate
member of a known 4-member $z=4.32$ galaxy overdensity by its model-predicted
and photometric redshifts. These five members span a physical extent of
$\sim$60 kpc and exhibit multiple components consistent with satellite
associations. Thirteen additional candidates selected by
spectroscopic/photometric constraints are small and faint, with a mean apparent
brightness corrected for lensing magnification that is $\sim$2.2 mag fainter
than M*. NIRCam imaging admits a wide range of brightnesses and morphologies
for these candidates, suggesting a more diverse galaxy population may be
underlying this rare view of a strongly-lensed galaxy overdensity.
Description
Paper 1: The JWST PEARLS View of the El Gordo Galaxy Cluster and of the Structure It Magnifies
%0 Generic
%1 frye2023paper
%A Frye, Brenda L.
%A Pascale, Massimo
%A Foo, Nicholas
%A Leimbach, Reagen
%A Garuda, Nikhil
%A Robles, Paulina Soto
%A Summers, Jake
%A Diaz, Carlos
%A Kamieneski, Patrick
%A Furtak, Lukas
%A Cohen, Seth
%A Diego, Jose
%A Beauchesne, Benjamin
%A Windhorst, Rogier
%A Willner, Steve
%A Koekemoer, Anton M.
%A Zitrin, Adi
%A Caminha, Gabriel
%A Caputi, Karina
%A Coe, Dan
%A Conselice, Christopher J.
%A Dai, Liang
%A Dole, Herve
%A Driver, Simon
%A Grogin, Norman
%A Harrington, Kevin
%A Jansen, Rolf A.
%A Kneib, Jean-Paul
%A Lehnert, Matt
%A Lowenthal, James
%A Marshall, Madeline A.
%A Menanteau, Felipe
%A Pampleiga, Belen Alcalde
%A Pirzkal, Nor
%A Polletta, Mari
%A Richard, Johan
%A Robotham, Aaron
%A Ryan, Russell E.
%A Rutkowski, Michael J.
%A Sifon, Christobal
%A Tompkins, Scott
%A Wang, Daniel
%A Yan, Haojing
%A Yun, Min S.
%D 2023
%K tifr
%T Paper 1: The JWST PEARLS View of the El Gordo Galaxy Cluster and of the
Structure It Magnifies
%U http://arxiv.org/abs/2303.03556
%X The massive galaxy cluster El Gordo ($z=0.87$) imprints multitudes of
gravitationally lensed arcs onto James Webb Space Telescope (JWST)
Near-Infrared Camera (NIRCam) images. Eight bands of NIRCam imaging were
obtained in the Prime Extragalactic Areas for Reionization and Lensing Science
(PEARLS) program (GTO #1176). PSF-matched photometry across a suite of Hubble
Space Telescope (HST) and NIRCam filters gives new photometric redshifts. We
confirm 54 known image multiplicities and find two new ones and construct a
lens model based on the light-traces-mass method. The mass within 500kpc
estimated from the lens model is $\sim$$7.0\times10^14$M$_ødot$ with a
mass ratio between the southeastern and northwestern components of $\sim$unity,
similar to recent works. A statistical search for substructures recovers only
these two components, which are each tightly bound kinematically and are
separated in radial velocity by ~300 km s$^-1$. We identify a candidate
member of a known 4-member $z=4.32$ galaxy overdensity by its model-predicted
and photometric redshifts. These five members span a physical extent of
$\sim$60 kpc and exhibit multiple components consistent with satellite
associations. Thirteen additional candidates selected by
spectroscopic/photometric constraints are small and faint, with a mean apparent
brightness corrected for lensing magnification that is $\sim$2.2 mag fainter
than M*. NIRCam imaging admits a wide range of brightnesses and morphologies
for these candidates, suggesting a more diverse galaxy population may be
underlying this rare view of a strongly-lensed galaxy overdensity.
@misc{frye2023paper,
abstract = {The massive galaxy cluster El Gordo ($z=0.87$) imprints multitudes of
gravitationally lensed arcs onto James Webb Space Telescope (JWST)
Near-Infrared Camera (NIRCam) images. Eight bands of NIRCam imaging were
obtained in the Prime Extragalactic Areas for Reionization and Lensing Science
(PEARLS) program (GTO #1176). PSF-matched photometry across a suite of Hubble
Space Telescope (HST) and NIRCam filters gives new photometric redshifts. We
confirm 54 known image multiplicities and find two new ones and construct a
lens model based on the light-traces-mass method. The mass within 500kpc
estimated from the lens model is $\sim$$7.0\times10^{14}$M$_{\odot}$ with a
mass ratio between the southeastern and northwestern components of $\sim$unity,
similar to recent works. A statistical search for substructures recovers only
these two components, which are each tightly bound kinematically and are
separated in radial velocity by ~300 km s$^{-1}$. We identify a candidate
member of a known 4-member $z=4.32$ galaxy overdensity by its model-predicted
and photometric redshifts. These five members span a physical extent of
$\sim$60 kpc and exhibit multiple components consistent with satellite
associations. Thirteen additional candidates selected by
spectroscopic/photometric constraints are small and faint, with a mean apparent
brightness corrected for lensing magnification that is $\sim$2.2 mag fainter
than M*. NIRCam imaging admits a wide range of brightnesses and morphologies
for these candidates, suggesting a more diverse galaxy population may be
underlying this rare view of a strongly-lensed galaxy overdensity.},
added-at = {2023-03-08T06:34:24.000+0100},
author = {Frye, Brenda L. and Pascale, Massimo and Foo, Nicholas and Leimbach, Reagen and Garuda, Nikhil and Robles, Paulina Soto and Summers, Jake and Diaz, Carlos and Kamieneski, Patrick and Furtak, Lukas and Cohen, Seth and Diego, Jose and Beauchesne, Benjamin and Windhorst, Rogier and Willner, Steve and Koekemoer, Anton M. and Zitrin, Adi and Caminha, Gabriel and Caputi, Karina and Coe, Dan and Conselice, Christopher J. and Dai, Liang and Dole, Herve and Driver, Simon and Grogin, Norman and Harrington, Kevin and Jansen, Rolf A. and Kneib, Jean-Paul and Lehnert, Matt and Lowenthal, James and Marshall, Madeline A. and Menanteau, Felipe and Pampleiga, Belen Alcalde and Pirzkal, Nor and Polletta, Mari and Richard, Johan and Robotham, Aaron and Ryan, Russell E. and Rutkowski, Michael J. and Sifon, Christobal and Tompkins, Scott and Wang, Daniel and Yan, Haojing and Yun, Min S.},
biburl = {https://www.bibsonomy.org/bibtex/2f7683cf062ae5a222f010d9be8ed99d4/citekhatri},
description = {Paper 1: The JWST PEARLS View of the El Gordo Galaxy Cluster and of the Structure It Magnifies},
interhash = {2bd232a72e2d467f927eb0f74300e819},
intrahash = {f7683cf062ae5a222f010d9be8ed99d4},
keywords = {tifr},
note = {cite arxiv:2303.03556Comment: 23 pages, submitted to ApJ},
timestamp = {2023-03-08T06:34:24.000+0100},
title = {Paper 1: The JWST PEARLS View of the El Gordo Galaxy Cluster and of the
Structure It Magnifies},
url = {http://arxiv.org/abs/2303.03556},
year = 2023
}