443 citations · 9.8k across the 192 of their papers we have counts for
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Disks irradiated by beamed radiation from compact objects
Rosalba Perna, Lars Hernquist
We examine the reprocessing of X-ray radiation from compact objects by accretion disks when the X-ray emission from the star is highly beamed. The reprocessed flux for various degr…
X-Ray Lines from Hot Flows around White Dwarfs. Application to SS Cygni
Kristen Menou, Rosalba Perna, John Raymond
Rather than accreting via a disk, some White Dwarfs (WDs) in quiescent Dwarf Novae (DN) could accrete via an Advection-Dominated Accretion Flow (ADAF) possibly responsible for the…
Consequences of Interstellar Absorption for Models of Anomalous X-ray Pulsars
Rosalba Perna, Jeremy Heyl, Lars Hernquist
We examine properties of thermal radiation emitted by strongly magnetized neutron stars (NSs). In particular, we show that the pulsation amplitudes of the energy-integrated flux ar…
Gamma-ray burst afterglows as probes of galactic and intergalactic dust
Rosalba Perna, Anthony Aguirre
The amount and properties of high-redshift galactic and intergalactic (IG) dust are largely unknown, but could be investigated using multi-wavelength photometry of high-z objects t…
X-ray Line Diagnostics of Hot Accretion Flows around Black Holes
Rosalba Perna, John Raymond, Ramesh Narayan
We compute X-ray emission lines from thermal plasma in hot accretion flows. We show that line profiles are strong probes of the gas dynamics, and we present line-ratio diagnostics…
Synchrotron Emission from Hot Accretion Flows and the Cosmic Microwave Background Anisotropy
Rosalba Perna, Tiziana Di Matteo
Current estimates of number counts of radio sources in the frequency range where the most sensitive Cosmic Microwave Background (CMB) experiments are carried out significantly unde…