University of Wisconsin-Madison Skip navigationDepartment of Physics Search Site Map UW Home


UW Home Page


This Week at Physics

Physics Events this

Colloquia & Seminars

Physics Department

Astronomy Colloquia

Chaos & Complex
Systems Seminars

College of Engineering

High Energy Seminars

Medical Physics

NPAC Forums

Physics Department

"Physics Today"

Physics/ECE/NE 922

R. G. Herb Materials
Physics Seminars

String Theory Seminars

Theory/Phenomenology Seminars

Wonders of Physics

Department of Physics
Colloquia & Seminars

Physics Department Colloquium
Circinus X-1 - A puzzle solved
Time: 3:30 PM
Place: 2441 Chamberlin Hall (coffee at 430 pm)
Speaker: Sebastian Heinz, University of Wisconsin-Madison
Abstract: Neutron stars are nature's strongest magnets. At birth their fields are thought to exceed 1e8 Tesla and can reach up to 1e11 Tesla. Over time, these strong fields are believed to decay, but this process is expected to take millions of years. When a neutron star is born in a supernova explosion, it may stay bound to a stellar companion it was in orbit with before. In such a case, the companion can transfer mass to the neutron star and make it shine - we call this an X-ray binary. The nature of the accretion transport of matter can tell us a lot about the properties of a neutron star. For example, we can use X-ray binaries to probe whether the simple picture of young strong magnetized and old weakly magnetized neutron stars hold in nature. I will present results from an ongoing study of the neutron star X-ray binary Circinus X-1 that solve a number of outstanding puzzles about this source and show that even young neutron stars can be weakly magnetized.
Host: Justin Vandenbroucke
Download video

Do you have questions? Oh yes you do!
Contact (access restricted)

  $Id:,v 1.1 2011/10/25 17:40:19 rader Exp $