{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,24]],"date-time":"2025-10-24T16:44:15Z","timestamp":1761324255712,"version":"3.37.3"},"reference-count":62,"publisher":"American Astronomical Society","issue":"1","license":[{"start":{"date-parts":[[2019,12,6]],"date-time":"2019-12-06T00:00:00Z","timestamp":1575590400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/iopscience.iop.org\/page\/copyright"},{"start":{"date-parts":[[2019,12,6]],"date-time":"2019-12-06T00:00:00Z","timestamp":1575590400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/iopscience.iop.org\/info\/page\/text-and-data-mining"}],"content-domain":{"domain":["iopscience.iop.org"],"crossmark-restriction":false},"short-container-title":["ApJ"],"published-print":{"date-parts":[[2019,12,10]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>We present deep <jats:italic>Chandra<\/jats:italic> observations of A3411\u201312, a remarkable merging cluster that hosts the most compelling evidence for electron reacceleration at cluster shocks to date. Using the <jats:inline-formula>\n                     <jats:tex-math>\n\n<\/jats:tex-math>\n                     <jats:inline-graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"apjab4ce5ieqn1.gif\" xlink:type=\"simple\"\/>\n                  <\/jats:inline-formula> scaling relation, we find <jats:italic>r<\/jats:italic>\n                  <jats:sub>500<\/jats:sub>\u00a0\u223c\u00a01.3 Mpc, <jats:inline-formula>\n                     <jats:tex-math>\n\n<\/jats:tex-math>\n                     <jats:inline-graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"apjab4ce5ieqn2.gif\" xlink:type=\"simple\"\/>\n                  <\/jats:inline-formula>, <jats:inline-formula>\n                     <jats:tex-math>\n\n<\/jats:tex-math>\n                     <jats:inline-graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"apjab4ce5ieqn3.gif\" xlink:type=\"simple\"\/>\n                  <\/jats:inline-formula>, and a gas mass of <jats:inline-formula>\n                     <jats:tex-math>\n\n<\/jats:tex-math>\n                     <jats:inline-graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"apjab4ce5ieqn4.gif\" xlink:type=\"simple\"\/>\n                  <\/jats:inline-formula>. The gas mass fraction within <jats:italic>r<\/jats:italic>\n                  <jats:sub>500<\/jats:sub> is <jats:inline-formula>\n                     <jats:tex-math>\n\n<\/jats:tex-math>\n                     <jats:inline-graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"apjab4ce5ieqn5.gif\" xlink:type=\"simple\"\/>\n                  <\/jats:inline-formula>. We compute the shock strength using density jumps to conclude that the Mach number of the merging subcluster is small (<jats:inline-formula>\n                     <jats:tex-math>\n\n<\/jats:tex-math>\n                     <jats:inline-graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"apjab4ce5ieqn6.gif\" xlink:type=\"simple\"\/>\n                  <\/jats:inline-formula>). We also present density, temperature, pseudo-pressure, and pseudo-entropy maps. Based on the pseudo-entropy map, we conclude that the cluster is undergoing a mild merger, consistent with the small Mach number. On the other hand, radio relics extend over Mpc scale in the A3411\u201312 system, which strongly suggests that a population of energetic electrons already existed over extended regions of the cluster.<\/jats:p>","DOI":"10.3847\/1538-4357\/ab4ce5","type":"journal-article","created":{"date-parts":[[2019,12,6]],"date-time":"2019-12-06T14:14:03Z","timestamp":1575641643000},"page":"31","update-policy":"https:\/\/doi.org\/10.1088\/crossmark-policy","source":"Crossref","is-referenced-by-count":11,"title":["Chandra Observations of the Spectacular A3411\u201312 Merger Event"],"prefix":"10.3847","volume":"887","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8144-9285","authenticated-orcid":false,"given":"Felipe","family":"Andrade-Santos","sequence":"first","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0587-1660","authenticated-orcid":false,"given":"Reinout J.","family":"van Weeren","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8648-8507","authenticated-orcid":false,"given":"Gabriella","family":"Di Gennaro","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0813-5888","authenticated-orcid":false,"given":"David","family":"Wittman","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5455-2957","authenticated-orcid":false,"given":"Dongsu","family":"Ryu","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5470-305X","authenticated-orcid":false,"given":"Dharam Vir","family":"Lal","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4479-1265","authenticated-orcid":false,"given":"Vinicius M.","family":"Placco","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2691-2476","authenticated-orcid":false,"given":"Kevin","family":"Fogarty","sequence":"additional","affiliation":[]},{"given":"M. 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The American Astronomical Society. All rights reserved.","name":"copyright_information","label":"Copyright Information"},{"value":"2019-05-31","name":"date_received","label":"Date Received","group":{"name":"publication_dates","label":"Publication dates"}},{"value":"2019-10-09","name":"date_accepted","label":"Date Accepted","group":{"name":"publication_dates","label":"Publication dates"}},{"value":"2019-12-06","name":"date_epub","label":"Online publication date","group":{"name":"publication_dates","label":"Publication dates"}}]}}