110 citations · 323 across the 9 of their papers we have counts for
10 papers
Constraining the Porosities of Interstellar Dust Grains
Kevin Heng, Bruce T. Draine
We present theoretical calculations of the X-ray scattering properties of porous grain aggregates with olivine monomers. The small and large angle scattering properties of these ag…
A Direct Measurement of the Dust Extinction Curve in an Intermediate-Redshift Galaxy
Kevin Heng, Davide Lazzati, Rosalba Perna +5
We present a proof-of-concept study that dust extinction curves can be extracted from the infrared (IR), optical, ultraviolet (UV) and X-ray afterglow observations of GRBs without…
Spatial Structure and Collisionless Electron Heating in Balmer-dominated Shocks
Matthew van Adelsberg, Kevin Heng, Richard McCray +1
Balmer-dominated shocks in supernova remnants (SNRs) produce strong hydrogen lines with a two-component profile composed of a narrow contribution from cold upstream hydrogen atoms,…
Probing Elemental Abundances in SNR 1987A Using XMM-Newton
Kevin Heng, Frank Haberl, Bernd Aschenbach +1
We report on the latest (2007 Jan) observations of supernova remnant (SNR) 1987A from the XMM-Newton mission. Since the 2003 May observations of Haberl et al. (2006), 11 emission l…
Broad Lyman-Alpha Emission from Supernova Remnants in Young Galaxies
Kevin Heng, Rashid Sunyaev
Charge transfer (or exchange) reactions between hydrogen atoms and protons in collisionless shocks of supernova remnants (SNRs) are a natural way of producing broad Balmer, Lyman a…
The Transition Zone in Balmer-Dominated Shocks
Kevin Heng, Matthew van Adelsberg, Richard McCray +1
We examine the structure of the post-shock region in supernova remnants (SNRs). The ``shock transition zone'' is set up by charge transfer and ionization events between atoms and i…