Possible connection between the asymmetry of the North Polar Spur Loop I and Fermi Bubbles

by Sarkar Kartick

at Astrophysics and Cosmology Seminar

Wed, 09 May 2018, 11:15
Physics building (#54) room 207

Abstract

The North Polar Spur NPS is one of the biggest structures in the sky and has been known for almost half a century The distance origin of it since then has been debated over two possible scenarios first a local 200 pc origin and second a Galactic centre origin One of the crucial arguments against the Galactic centre origin is the apparent asymmetry of the NPS across the Galactic plane In this talk I will show that the asymmetry of the X ray signatures associated with the NPS can be obtained if the circumgalactic medium density in the southern Galactic hemisphere is approximately 20 smaller than the northern one Moreover the X ray and gamma ray signals from the Loop I can also be explained at the same model This proposition is also supported by the fact that the southern Fermi Bubble is approx 5 degrees bigger than the northern one I will also discuss the implications of such a common origin scenario on the existing models of the Fermi Bubbles

Created on 05-05-2018 by Bar Lev, Yevgeny (ybarlev)
Updaded on 05-05-2018 by Bar Lev, Yevgeny (ybarlev)