131 citations · 1.1k across the 27 of their papers we have counts for
26 papers
X-ray Emission Line Profiles from Wind Clump Bow Shocks in Massive Stars
R. Ignace, W. L. Waldron, J. P. Cassinelli
The consequences of structured flows continue to be a pressing topic in relating spectral data to physical processes occurring in massive star winds. In a preceding paper, our grou…
Early magnetic B-type stars: X-ray emission and wind properties
L. M. Oskinova, H. Todt, R. Ignace +3
We present a comprehensive study of X-ray emission and wind properties of massive magnetic early B-type stars. Dedicated XMM-Newton observations were obtained for three stars xi1 C…
Time-Dependent Behavior of Linear Polarization in Unresolved Photospheres, With Applications for The Hanle Effect
R. Ignace, K. T. Hole, J. P. Cassinelli +1
Aims: This paper extends previous studies in modeling time varying linear polarization due to axisymmetric magnetic fields in rotating stars. We use the Hanle effect to predict var…
A Multi-Phase Suzaku Study of X-rays from tau Sco
R. Ignace, L. M. Oskinova, M. Jardine +5
We obtained relatively high signal-to-noise X-ray spectral data of the early massive star tau Sco (B0.2V) with the Suzaku XIS instrument. This source displays several unusual featu…
Polarization Variability Arising from Clumps in the Winds of Wolf-Rayet Stars
Q. Li, J. P. Cassinelli, J. C. Brown +1
The polarimetric and photometric variability of Wolf-Rayet (WR) stars as caused by clumps in the winds, is revisited. In the model which is improved from Li et al. 2000, the radial…
Protodiscs around Hot Magnetic Rotator Stars
M. Maheswaran, J. P. Cassinelli
We develop equations and obtain solutions for the structure and evolution of a protodisc region that is initially formed with no radial motion and super-Keplerian rotation speed wh…