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  1. OA@INAF
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  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
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Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/28274
Title: Shocks and cold fronts in merging and massive galaxy clusters: new detections with Chandra
Authors: Botteon, A.
GASTALDELLO, FABIO 
BRUNETTI, GIANFRANCO 
Issue Date: 2018
Journal: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 
Number: 476
Issue: 4
First Page: 5591
Abstract: A number of merging galaxy clusters show the presence of shocks and cold fronts, i.e. sharp discontinuities in surface brightness and temperature. The observation of these features requires an X-ray telescope with high spatial resolution like Chandra, and allows to study important aspects concerning the physics of the intracluster medium (ICM), such as its thermal conduction and viscosity, as well as to provide information on the physical conditions leading to the acceleration of cosmic rays and magnetic field amplification in the cluster environment. In this work we search for new discontinuities in 15 merging and massive clusters observed with Chandra by using different imaging and spectral techniques of X-ray observations. Our analysis led to the discovery of 22 edges: six shocks, eight cold fronts, and eight with uncertain origin. All the six shocks detected have M< 2 derived from density and temperature jumps. This work contributed to increase the number of discontinuities detected in clusters and shows the potential of combining diverse approaches aimed to identify edges in the ICM. A radio follow-up of the shocks discovered in this paper will be useful to study the connection between weak shocks and radio relics.
URI: http://hdl.handle.net/20.500.12386/28274
URL: https://academic.oup.com/mnras/article/476/4/5591/4924506
ISSN: 0035-8711
DOI: 10.1093/mnras/sty598
Bibcode ADS: 2018MNRAS.476.5591B
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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Monthly Notices of the Royal Astronomical Society 2018 Botteon.pdfPDF editoriale19.17 MBAdobe PDFView/Open
1707.07038.pdf9.35 MBAdobe PDFView/Open
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