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| RX J1347.5-1145 | |
|---|---|
| Name | RX J1347.5-1145 |
| Epoch | J2000 |
| Redshift | 0.451 |
| Constellation | Virgo |
RX J1347.5-1145 is a massive, X-ray–luminous galaxy cluster located in the constellation Virgo first identified in X-ray surveys, noted for its extreme luminosity, strong gravitational lensing, and a powerful Sunyaev–Zel'dovich signal. The cluster has been the subject of multiwavelength studies involving X-ray, optical, radio, and millimeter observatories, and it features prominently in research on dark matter, galaxy evolution, and cosmological structure formation. Observations from facilities such as ROSAT, Chandra X-ray Observatory, XMM-Newton, Hubble Space Telescope, Atacama Large Millimeter/submillimeter Array, and Subaru Telescope have driven detailed analyses of its mass distribution, intracluster medium, and member galaxies.
RX J1347.5-1145 is an exceptionally bright X-ray cluster at moderate redshift, noted for hosting a dense core, powerful cooling signatures, and pronounced gravitational arcs; the system appears in catalogs compiled by surveys like ROSAT All-Sky Survey, Sloan Digital Sky Survey, and targeted follow-ups by European Southern Observatory instruments. As a high-mass cluster, it has been compared with archetypes such as Coma Cluster, Bullet Cluster, and Abell 1689 in studies by research groups affiliated with institutions like Harvard–Smithsonian Center for Astrophysics, Max Planck Society, and National Radio Astronomy Observatory. Its observational prominence has made it a benchmark for testing techniques employed by collaborations including Planck Collaboration, South Pole Telescope, and the Atacama Cosmology Telescope teams.
The cluster was first cataloged in serendipitous X-ray detections from the ROSAT mission and subsequently observed by Chandra X-ray Observatory for high-resolution imaging and by XMM-Newton for spectroscopy; optical and near-infrared imaging and spectroscopy were obtained with the Hubble Space Telescope, Subaru Telescope, and instruments at Keck Observatory. Follow-up millimeter and radio observations were conducted by Atacama Large Millimeter/submillimeter Array and the Very Large Array, while Sunyaev–Zel'dovich measurements involved teams from the Planck Collaboration and the South Pole Telescope. Groups from universities including University of California, Berkeley, Massachusetts Institute of Technology, and University of Oxford have published joint analyses combining these datasets.
The cluster’s redshift places it at substantial cosmological distance, with total mass estimates derived from X-ray temperature mapping, lensing reconstructions, and Sunyaev–Zel'dovich measurements produced by collaborations such as CFHTLens and teams using weak gravitational lensing methods; mass estimates have been compared to those of clusters like MACS J0717.5+3745 and CL J1226.9+3332. High X-ray luminosity, central temperature peaks, and disturbed morphology suggest merger activity analogous to phenomena seen in Bullet Cluster studies, and authors affiliated with Princeton University and Johns Hopkins University have modeled the cluster dynamics using simulations inspired by work at Los Alamos National Laboratory and Lawrence Berkeley National Laboratory.
Detailed X-ray spectroscopy from Chandra X-ray Observatory and XMM-Newton revealed dense, hot intracluster medium with metal abundances informed by comparisons to results from Suzaku (satellite) and analyses by groups at Stanford University; these data constrain cooling rates, entropy profiles, and feedback processes studied in the context of active galactic nuclei in systems observed by Very Large Telescope teams. The cluster’s strong Sunyaev–Zel'dovich signal has been mapped by Atacama Cosmology Telescope, Planck Collaboration, and the South Pole Telescope, enabling pressure profile reconstructions that complement X-ray-derived density and temperature maps used by cosmology groups at CERN and European Southern Observatory.
Prominent strong lensing features, including giant arcs and multiple-image systems identified in Hubble Space Telescope imaging, have enabled precise mass reconstructions using techniques developed by research groups at Columbia University, University of Tokyo, and University of Cambridge; comparisons with weak-lensing shear catalogs from Subaru Telescope and Canada–France–Hawaii Telescope improved constraints on the dark matter distribution. Lensing analyses have tested models of collisionless dark matter similar to studies of Bullet Cluster and informed theoretical work by authors associated with Institute for Advanced Study and Kavli Institute for Cosmological Physics.
Optical spectroscopy from Keck Observatory, imaging from Hubble Space Telescope, and photometry from Spitzer Space Telescope have characterized the cluster’s galaxy population, revealing a mix of massive ellipticals, brightest cluster galaxy candidates, and star-forming members analogous to populations cataloged in Galaxy And Mass Assembly and COSMOS (survey). Studies by research teams at University of Toronto and Max Planck Institute for Astronomy examined star-formation rates, dust content, and active galactic nucleus incidence using comparisons with samples from DEEP2 Galaxy Redshift Survey and VIMOS VLT Deep Survey.
RX J1347.5-1145 serves as a laboratory for testing cosmological models, mass-observable scaling relations, and feedback prescriptions used in simulations from groups at Millennium Simulation collaborators, Illustris teams, and EAGLE (project), while observational programs by Planck Collaboration, South Pole Telescope, and Atacama Cosmology Telescope use it to calibrate cluster-based constraints on Lambda-CDM parameters and structure growth. Its multiwavelength dataset supports methodological development in gravitational lensing, Sunyaev–Zel'dovich science, and intracluster medium physics pursued by consortia including LSST Science Collaboration and Euclid Consortium.