211 citations · 1k across the 17 of their papers we have counts for
17 papers
Discovery of an active supermassive black hole in the bulge-less galaxy NGC 4561
C. Araya Salvo, S. Mathur, H. Ghosh +2
We present XMM-Newton observations of the Chandra-detected nuclear X-ray source in NGC 4561. The hard X-ray spectrum can be described by a model composed of an absorbed power-law w…
Discovery of Nuclear X-ray Sources in SINGS Galaxies
Catherine J. Grier, Smita Mathur, Himel Ghosh +1
We present the results of a search for nuclear X-ray activity in nearby galaxies using Chandra archival data in a sample of 62 galaxies from the Spitzer Infrared Nearby Galaxy Surv…
The Spectral Energy Distributions of Red 2MASS AGN
Joanna Kuraszkiewicz, Belinda J. Wilkes, Gary Schmidt +7
We present infrared (IR) to X-ray spectral energy distributions (SEDs) for 44 red AGN selected from the 2MASS survey on the basis of their red J-K color (>2 mag) and later obse…
Detecting Low-Mass Supermassive Black Holes
Himel Ghosh, Smita Mathur, Fabrizio Fiore +1
We demonstrate the feasibility of uncovering supermassive black holes in late-type, quiescent spiral galaxies by detecting signs of very low-level nuclear activity. We use a combin…
Finding Local Low-mass Supermassive Black Holes
Smita Mathur, Himel Ghosh, Laura Ferrarese +1
The low-mass end of the supermassive black hole mass function is unknown and difficult to determine. Here we discuss our successful program to find active nuclei of late type "norm…
Low-Level Nuclear Activity in Nearby Spiral Galaxies
Himel Ghosh, Smita Mathur, Fabrizio Fiore +1
We are conducting a search for supermassive black holes (SMBHs) with masses below 10^7 M_sun by looking for signs of extremely low-level nuclear activity in nearby galaxies that ar…