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(No) dynamical constraints on the mass of the black hole in two ULXs
T. P. Roberts, J. C. Gladstone, A. D. Goulding +4
We present the preliminary results of two Gemini campaigns to constrain the mass of the black hole in an ultraluminous X-ray source (ULX) via optical spectroscopy. Pilot studies of…
Searching for Compton-thick active galactic nuclei at z~0.1
Andy Goulding, David Alexander, James Mullaney +4
Using a suite of X-ray, mid-IR and optical active galactic nuclei (AGN) luminosity indicators, we search for Compton-thick (CT) AGNs with intrinsic L_X>10^42erg/s at z~0.03-0.2, a…
A Chandra Perspective On Galaxy-Wide X-ray Binary Emission And Its Correlation With Star Formation Rate And Stellar Mass: New Results From Luminous Infrared Galaxies
B. D. Lehmer, D. M. Alexander, F. E. Bauer +5
We present new Chandra observations that complete a sample of seventeen (17) luminous infrared galaxies (LIRGs) with D < 60 Mpc and low Galactic column densities of N_H < 5 X 10^20…
Towards a Complete Census of AGNs in Nearby Galaxies: The Incidence of Growing Black Holes
Andy D. Goulding, David M. Alexander, Bret D. Lehmer +1
We investigate the local supermassive black hole (SMBH) density function and relative mass accretion rates of all active galactic nuclei (AGNs) identified in a volume-limited sampl…