When:
Friday, October 18, 2019
10:30 AM - 11:30 AM CT
Where: 1800 Sherman Avenue, 4-4430, Evanston, IL 60201 map it
Audience: Faculty/Staff - Student - Post Docs/Docs - Graduate Students
Cost: Free
Contact:
CIERA Astrophysics
(847) 491-8646
Group: CIERA - Special Seminars
Category: Lectures & Meetings
Northwestern University's Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA) presents a Special Seminar featuring:
Joe Bright (University of Oxford)
Talk Title: Extreme outflows from the black hole X-ray binary MAXI J1820+070
Abstract: Black hole X-ray binaries are ideal systems in which to study accretion and the production of outflows, particularly ejections and collimated, relativistic, jets. As observed at X-ray wavelengths, outbursting X-ray binaries transition through a number of accretion states which are strongly coupled to the form of the associated outflow (primarily observed at radio frequencies). I will present an extensive set of radio observations of the recently discovered black hole MAXI J1820+070 during its 2018 outburst, taken using five interferometers over a 500 day period. These observations, when combined with X-ray data, provide one of the best looks at the association between accretion and jets in such systems. In addition, MAXI J1820+070 launched discrete superluminal bi-polar ejections, which we track at a range of angular scales for 200 days as they reach separations of over 0.1 parsec from their launch position at the black hole. I will discuss new insights into the energy content of these ejections, and their association with radio flaring seen as black hole X-ray binaries transition between accretion states.
Host: Raffaella Margutti