TY - JOUR
T1 - Strong and weak lensing united. III. Measuring the mass distribution of the merging galaxy cluster 1ES 0657-558
AU - Bradač, Maruša
AU - Clowe, Douglas
AU - Gonzalez, Anthony H.
AU - Marshall, Phil
AU - Forman, William
AU - Jones, Christine
AU - Markevitch, Maxim
AU - Randall, Scott
AU - Schrabback, T. I.M.
AU - Zaritsky, Dennis
PY - 2006/12/1
Y1 - 2006/12/1
N2 - The galaxy cluster 1ES 0657-558 (z = 0.296) is remarkably well suited for addressing outstanding issues in both galaxy evolution and fundamental physics. We present a reconstruction of the mass distribution from both strong and weak gravitational lensing data. Multicolor, high-resolution HST ACS images allow detection of many more arc candidates than were previously known, especially around the subcluster. Using the known redshift of one of the multiply imaged systems, we determine the remaining source redshifts using the predictive power of the strong-lens model. Combining this information with shape measurements of "weakly" lensed sources, we derive a high-resolution, absolutely calibrated mass map, using no assumptions regarding the physical properties of the underlying cluster potential. This map provides the best available quantification of the total mass of the central part of the cluster. We also confirm the result from Clowe and colleagues that the total mass does not trace the baryonic mass.
AB - The galaxy cluster 1ES 0657-558 (z = 0.296) is remarkably well suited for addressing outstanding issues in both galaxy evolution and fundamental physics. We present a reconstruction of the mass distribution from both strong and weak gravitational lensing data. Multicolor, high-resolution HST ACS images allow detection of many more arc candidates than were previously known, especially around the subcluster. Using the known redshift of one of the multiply imaged systems, we determine the remaining source redshifts using the predictive power of the strong-lens model. Combining this information with shape measurements of "weakly" lensed sources, we derive a high-resolution, absolutely calibrated mass map, using no assumptions regarding the physical properties of the underlying cluster potential. This map provides the best available quantification of the total mass of the central part of the cluster. We also confirm the result from Clowe and colleagues that the total mass does not trace the baryonic mass.
KW - Dark matter
KW - Galaxies: clusters: general
KW - Galaxies: clusters: individual (1ES 0657-558)
KW - Gravitational lensing
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U2 - 10.1086/508601
DO - 10.1086/508601
M3 - Article
AN - SCOPUS:33845883072
SN - 0004-637X
VL - 652
SP - 937
EP - 947
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 2 I
ER -