Igoshev, Andrei, Barr\u00e8re, Paul, Raynaud, Rapha\u00ebl, Guilet, J\u00e9rome, Wood, Toby, Hollerbach, Rainer\u00a0<\/p>\n\n\n\n
Low-field magnetars have dipolar magnetic fields of 10<\/span>12<\/span>-10<\/span>13<\/span>\u00a0G, 10-100 times weaker than the values of magnetic-field strength B \u2248 10<\/span>14<\/span>-10<\/span>15<\/span>\u00a0G used to define classical magnetars, yet they produce similar X-ray bursts and outbursts. Using direct numerical simulations of magnetothermal evolution starting from a dynamo-generated magnetic field, we show that the low-field magnetars can be produced as a result of a Tayler-Spruit dynamo inside a proto-neutron star. We find that these simulations naturally explain key characteristics of low-field magnetars: weak (\u227210<\/span>13<\/span>\u00a0G) dipolar magnetic fields, strong small-scale fields and magnetically induced crustal failures producing X-ray bursts. These findings suggest that the formation channel of low-B magnetars is distinct from that for classical magnetars, reflecting potential differences in proto-neutron-star dynamos.<\/span><\/p>\n\n\n\n NA article<\/a><\/p>\n\n\n\n <\/p>\n","protected":false},"excerpt":{"rendered":" Igoshev, Andrei, Barr\u00e8re, Paul, Raynaud, Rapha\u00ebl, Guilet, J\u00e9rome, Wood, Toby, Hollerbach, Rainer\u00a0 Low-field magnetars have dipolar magnetic fields of 1012-1013\u00a0G, 10-100 times weaker than the values of magnetic-field strength B \u2248 1014-1015\u00a0G used to define classical magnetars, yet they produce similar X-ray bursts and outbursts. Using direct numerical simulations of magnetothermal evolution starting from a … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-228","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"http:\/\/www.pulsars.info\/wordpress\/wp-json\/wp\/v2\/posts\/228","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.pulsars.info\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.pulsars.info\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.pulsars.info\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.pulsars.info\/wordpress\/wp-json\/wp\/v2\/comments?post=228"}],"version-history":[{"count":1,"href":"http:\/\/www.pulsars.info\/wordpress\/wp-json\/wp\/v2\/posts\/228\/revisions"}],"predecessor-version":[{"id":229,"href":"http:\/\/www.pulsars.info\/wordpress\/wp-json\/wp\/v2\/posts\/228\/revisions\/229"}],"wp:attachment":[{"href":"http:\/\/www.pulsars.info\/wordpress\/wp-json\/wp\/v2\/media?parent=228"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.pulsars.info\/wordpress\/wp-json\/wp\/v2\/categories?post=228"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.pulsars.info\/wordpress\/wp-json\/wp\/v2\/tags?post=228"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}