200 citations · 543 across the 14 of their papers we have counts for
14 papers
Paschen Jumps in Little Red Dots: Evidence for Nebular Continua
Albert Sneppen, James H. Matthews, Darach Watson +6
''Little Red Dots'' (LRDs) are broad-line sources at high redshift, initially identified by their compact morphologies, red colours and prominent Balmer breaks. The origin of their…
The critical role of clumping in line-driven disc winds
Amin Mosallanezhad, Christian Knigge, Nicolas Scepi +4
Radiation pressure on spectral lines is a promising mechanism for powering disc winds from accreting white dwarfs (AWDs) and active galactic nuclei (AGN). However, in radiation-hyd…
A Diagnostic Kit for Optical Emission Lines Shaped by Accretion Disc Winds
Austen G. W. Wallis, Christian Knigge, James H. Matthews +2
Blueshifted absorption is the classic spectroscopic signature of an accretion disc wind in X-ray binaries and cataclysmic variables (CVs). However, outflows can also create pure em…
SIROCCO: A Publicly Available Monte Carlo Ionization and Radiative Transfer Code for Astrophysical Outflows
James H. Matthews, Knox S. Long, Christian Knigge +8
Outflows are critical components of many astrophysical systems, including accreting compact binaries and active galactic nuclei (AGN). These outflows can significantly affect a sys…
Do Reverberation Mapping Analyses Provide an Accurate Picture of the Broad Line Region?
S. W. Mangham, C. Knigge, P. Williams +6
Reverberation mapping (RM) is a powerful approach for determining the nature of the broad-line region (BLR) in active galactic nuclei. However, inferring physical BLR properties fr…
Growing evidence that SNe Iax are not a one-parameter family: the case of PS1-12bwh
M. R. Magee, R. Kotak, S. A. Sim +10
In this study, we present observations of a type Iax supernova, PS1-12bwh, discovered during the Pan-STARRS1 3-survey. Our analysis was driven by previously unseen pre-maximum,…