888 citations · 8.4k across the 106 of their papers we have counts for
11 papers · 1 filter
Multi-dimensional modelling of X-ray spectra for AGN accretion-disk outflows
S. A. Sim, K. S. Long, L. Miller +1
We use a multi-dimensional Monte Carlo code to compute X-ray spectra for a variety of active galactic nucleus (AGN) disk-wind outflow geometries. We focus on the formation of blue-…
On the gamma-ray emission of Type Ia Supernovae
S. A. Sim, P. A. Mazzali
A multi-dimension, time-dependent Monte Carlo code is used to compute sample gamma-ray spectra to explore whether unambiguous constraints could be obtained from gamma-ray observati…
Light curves for off-centre ignition models of type Ia supernovae
S. A. Sim, D. N. Sauer, F. K. Röpke +1
Motivated by recent models involving off-centre ignition of type Ia supernova explosions, we undertake three-dimensional time-dependent radiation transport simulations to investiga…
Off-center explosions of Chandrasekhar-mass white dwarfs: an explanation of super-bright type Ia supernovae?
W. Hillebrandt, S. A. Sim, F. K. Röpke
The recent discovery of a very bright type Ia supernova, SNLS-03D3bb ( SN 2003fg), in the Supernova Legacy Survey (SNLS) has raised the question of whether super-Chandrasek…
Evidence for relativistic features in the X-ray spectrum of Mrk 335
Anna Lia Longinotti, Stuart Sim, Kirpal Nandra +1
We present an analysis of hard X-ray features in the spectrum of the bright Sy 1 galaxy Mrk 335 observed by the XMM-Newton satellite. Our analysis confi rms the presence of a broad…
2-D Monte Carlo simulations of H I line formation in massive YSO disk winds
S. A. Sim, J. E. Drew, K. S. Long
Massive young stellar objects (YSOs) are powerful infrared H I line emitters. It has been suggested that these lines form in a outflow from a disk surrounding the YSO. Here, new tw…