Using Pulsars to Measure Density Profiles in the Upper Ionosphere
Thursday April 13, 2017
|Presenter:||Joe Malins (UNM)|
|Series:||Center for Astrophysics Research and Technologies Seminar Series|
This talk will describe how rotation measurements of pulsars are used to help determine the profile of the topside ionosphere. Total electron content of the Ionosphere is determined using dual band GPS receivers, and are used in conjunction with rotation measurements of highly polarized pulsars obtained from the LWA. Additionally, the bottom side profile of the ionosphere are obtained with ionosonde measurements, leaving only the profile of the top side ionosphere. Since the rotation measure of the pulsars is determined by not just the electron density but also by the dot product with the magnetic field, which has a strong vertical gradient, we are able to constrain the the Varys-Chapman top side model with physical measurement better than has been obtained previously through modelling of top side ionosonde data alone.
|Location:||Room 190, Physics & Astronomy|