{"id":7849,"date":"2022-06-20T18:30:08","date_gmt":"2022-06-20T16:30:08","guid":{"rendered":"https:\/\/www.lapth.cnrs.fr\/event\/detached-high-mass-x-ray-binaries-mass-transfer-and-coupling-to-the-magnetosphere\/"},"modified":"2022-06-20T18:30:08","modified_gmt":"2022-06-20T16:30:08","slug":"detached-high-mass-x-ray-binaries-mass-transfer-and-coupling-to-the-magnetosphere","status":"publish","type":"tribe_events","link":"https:\/\/www.lapth.cnrs.fr\/en\/event\/detached-high-mass-x-ray-binaries-mass-transfer-and-coupling-to-the-magnetosphere\/","title":{"rendered":"Detached high-mass X-ray binaries : mass transfer and coupling to the magnetosphere"},"content":{"rendered":"<p><span><span><span>Once massive stars leave the main sequence, their evolution is largely set by mass loss through intense radiation-driven winds. Stellar multiplicity has been recognized as a ubiquitous feature: stars seldom live an effectively single life. In the advanced evolutionary stages of a massive binary, mass transfer via stellar winds can become significant and decide the final fate of both bodies. In high mass X-ray binaries (HMXBs), which are good progenitor candidates for merging compact objects, a blue supergiant is in close orbit with a a young and highly magnetized neutron star (NS) or a black hole (BH) which captures a fraction of the stellar wind.<\/span><\/span><\/span><\/p>\n<p><span><span><span>In this talk, I will show how the numerical tool grants us access to accurate estimates of the mass and angular momentum transfer rates in wind-fed HMXBs. After describing the conditions of formation of wind-captured disks around the NS or the BH, I will discuss the long term evolution of the orbital separation. We will see that HMXBs in the solar neighbourhood spend a significant fraction of their lifetime with an X-ray luminosity above detectable levels. I will present the implications for phases of enhanced mass transfer, for the spinning up and down of the accretor and for the natal kick of the compact object. Finally, I will report on recent results concerning particle acceleration in the magnetosphere of a Kerr BH connected to a Keplerian disk, a mechanism which might be responsible for coronal heating and non-thermal flares.<\/span><\/span><\/span><\/p>\n<p><span><span><span>&#8211; &#8211; &#8211;<\/span><\/span><\/span><\/p>\n<p><span><span><span>After a seminal research experience with Saul Rappaport at MIT in 2011-2012, I graduated in Paris in 2016. During my PhD, I made use of grid-based numerical simulations to characterize the flow surrounding an accreting compact object moving with respect to an ambient medium. In Leuven, I was granted a Pegasus Marie Curie fellowship to model mass transfer through wind capture in high-mass X-ray binaries. I moved to Grenoble in October this year where I now work with Beno\u00eet Cerutti on particle-in-cell simulations of magnetic reconnection in the magnetosphere of black holes.<\/span><\/span><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Once massive stars leave the main sequence, their evolution is largely set by mass loss through intense radiation-driven winds. Stellar multiplicity has been recognized as a ubiquitous feature: stars seldom [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"template":"","meta":{"_acf_changed":false,"_tribe_events_status":"","_tribe_events_status_reason":"","footnotes":""},"tags":[],"tribe_events_cat":[18],"class_list":["post-7849","tribe_events","type-tribe_events","status-publish","hentry","tribe_events_cat-weekly-seminars","cat_weekly-seminars"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.lapth.cnrs.fr\/en\/wp-json\/wp\/v2\/tribe_events\/7849","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lapth.cnrs.fr\/en\/wp-json\/wp\/v2\/tribe_events"}],"about":[{"href":"https:\/\/www.lapth.cnrs.fr\/en\/wp-json\/wp\/v2\/types\/tribe_events"}],"author":[{"embeddable":true,"href":"https:\/\/www.lapth.cnrs.fr\/en\/wp-json\/wp\/v2\/users\/1"}],"version-history":[{"count":0,"href":"https:\/\/www.lapth.cnrs.fr\/en\/wp-json\/wp\/v2\/tribe_events\/7849\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.lapth.cnrs.fr\/en\/wp-json\/wp\/v2\/media?parent=7849"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lapth.cnrs.fr\/en\/wp-json\/wp\/v2\/tags?post=7849"},{"taxonomy":"tribe_events_cat","embeddable":true,"href":"https:\/\/www.lapth.cnrs.fr\/en\/wp-json\/wp\/v2\/tribe_events_cat?post=7849"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}