Natural model for the Fermi bubbles and Galactic haze

by Ilya Gurwich

at Astrophysics and Cosmology Seminar

Wed, 18 Nov 2015, 11:15
Physics building (#54) room 207

Abstract

We show that the Fermi Bubbles and the Galactic haze are naturally interpreted as inverse Compton and synchrotron emission from the same spectrum of cooling cosmic ray electrons This avoids the ad hoc spectral features and superfluous acceleration mechanisms typically assumed The model implies that the bubbles originated 2 3 Myr ago the mean magnetic field in the haze region is 3 muG and the radiation field in the bubble is dominated by starlight with mean energy density gt 2eV cm 3 These parameters imply that the bubbles accelerate cosmic ray protons iron nuclei up to energies of 5 10 17 eV 10 19 eV In contrast a hadronic model fails to naturally account for the gamma ray spectrum of the bubbles in particular once the haze emitting electrons are taken into account

Created on 24-10-2015 by Bar Lev, Yevgeny (ybarlev)
Updaded on 24-10-2015 by Bar Lev, Yevgeny (ybarlev)