What's in a Fermi Bubble: a quasar episode in the Galactic centre
Abstract
Fermi bubbles, the recently observed giant (~10 kpc high) gamma-ray emitting lobes on either side of our Galaxy (Su et al. 2010), appear morphologically connected to the Galactic center, and thus offer a chance to test several models of supermassive black hole (SMBH) evolution, feedback and relation with their host galaxies. We use a physical feedback model (King 2003, 2010) and novel numerical techniques (Nayakshin et al. 2009) to simulate a short burst of activity in Sgr A*, the central SMBH of the Milky Way, ~6 Myr ago, temporally coincident with a star formation event in the central parsec. We are able to reproduce the bubble morphology and energetics both analytically (Zubovas et al. 2011) and numerically (Zubovas & Nayakshin, in prep). These results provide strong support to the model, which was also used to simulate more extreme environments (Nayakshin & Power 2010).
Keywords
Cite
@article{arxiv.1201.3536,
title = {What's in a Fermi Bubble: a quasar episode in the Galactic centre},
author = {Kastytis Zubovas and Sergei Nayakshin and Andrew King},
journal= {arXiv preprint arXiv:1201.3536},
year = {2012}
}
Comments
2 pages, 2 figures. To appear in the proceedings of the "AGN winds in Charleston" conference