Joint Astrophysics/Space Physics Seminar

November 6, 2019 - 3:30pm to 4:30pm
301 Van Allen Hall

Mr. Daniel LaRocca; Department of Physics & Astronomy; University of Iowa

“A HaloSat X-ray Analysis of the North Polar Spur”

Abstract: The North Polar Spur (NPS) is one of the largest and most prominent objects in the X-ray sky. Some believe the NPS to be the X-ray counterpart of the Galactic scale gamma-ray bubbles seen in the Fermi-LAT analysis. Others believe the NPS to be the limb-brightened edge of a nearby super-bubble. We used HaloSat to take a series of moderately well-resolved spectral observations over the entirety of the NPS structure. With these observations we can probe how the properties of the plasma vary across the object. As my comprehensive examination and in conjunction with the HaloSat science meeting, we will discuss the open questions about the NPS and present preliminary analysis for the
observations. We will then describe the plans for this analysis moving forward.