Physical Sciences and Mathematics Commons^™

X-Ray Emission From The Sombrero Galaxy: A Galactic-Scale Outflow, Z Li, C Jones, Wr Forman, Rp Krafts, Dv Lal, Rd Stefano, Lr Spitler, S Tang, Qd Wang, M Gilfanov, M Revnivtsev

Astronomy Department Faculty Publication Series

Based on new and archival Chandra observations of the Sombrero galaxy (M 104 = NGC 4594), we study the X-ray emission from its nucleus and the extended X-ray emission in and around its massive stellar bulge. We find that the 0.3-8 keV luminosity of the nucleus appears constant at ~2.4 × 10⁴⁰ erg s^-1, or ~10^–7 of its Eddington luminosity, on three epochs between 1999 December and 2008 April, but drops by a factor of two in the 2008 November observation. The 2-6 keV unresolved emission from the bulge region closely follows the K-band starlight …