Tuesday Physics Seminar: Local Hot Bubble

Tuesday, October 29, 2019 The event started -46 days ago

2:50 PM 3:50 PM

Optics Building

Room 234

Solar Wind Charge Exchange and Properties of the Local Hot Bubble from the DXL Mission

Dr Wenhao Liu (UAH)

The diffuse X-ray background was discovered at the dawn of X-ray astronomy and has been extensively studied. It was believed that a significant fraction of the X-ray foreground emission in the 1/4 keV band originates  in an irregularly shaped cavity which contains the Sun and has been dubbed as local hot bubble (LHB). However, recent studies have shown that X-ray emission in this band can also originate within the solar system, via a process called Solar Wind Charge eXchange (SWCX).  Diffuse X-rays from the Local Galaxy (DXL) is a sounding rocket mission designed to quantify and characterize the contribution of  SWCX to the diffuse X-ray background and study the properties of the local hot bubble (LHB). The DXL mission measured the spatial  signature of SWCX emission due to the Helium focusing core. A direct comparison of DXL and Rosat All Sky Survey (RASS) data allowed  us to quantify the SWCX contribution to all 6 RASS bands. In this talk I will discuss the results from the DXL mission, SWCX contributions to the diffuse X-ray background, and the properties of LHB after removing the SWCX contamination.


Details

Category
Conference/Lecture
department
College of Science, Physics and Astronomy
Audience
Public, Students, Faculty and Staff, Alumni

Contact

Ming Sum This email address is being protected from spambots. You need JavaScript enabled to view it.

Venue

Optics Building

John Wright Blvd.Huntsville, AL 35899

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