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Feed for Speed: Examining the role of accretion and its relationship to jet kinematics

Event Details

Event Dates: 

Friday, February 27, 2015 - 12:00pm

Seminar Location: 

  • CASA Conference Room C324

Speaker Name(s): 

Ashley King

Speaker Affiliation(s): 

Stanford
Seminar Type/Subject

Scientific Seminar Type: 

  • Astrophysics Lunch Seminar

Event Details & Abstract: 

Accreting black holes are observed to launch relativistic, collimated jets of matter and radiation. These sources come in a range of morphologies and structures, and it is important to try and understand the underlying physical processes responsible for the dramatic differences between jets. In this work, we examine the role of mass accretion as probed via X-ray luminosity and its connection to jet properties, in particular jet knot velocities. We find a positive correlation between the mass-scaled X-ray luminosity and jet knot velocity. In addition, we find evidence that the jet velocity is also a function of viewing angle, supporting the "spine-sheath" model of jet production. Our results reveal a fundamental aspect of how accretion shapes mechanical feedback from black holes into their host environments.