Publications (30)
Effects on vsini determinations of O stars from 3D model atmospheres with high turbulent velocities
L. Delbroek, J. O. Sundqvist, F. Backs +3
When studying massive stars and their life cycles, rotation plays a key role. Hence, understanding the rotation of these stars is crucial when determining their properties, or for…
Fresnel zone plate telescopes for X-ray imaging II: numerical simulations with parallel and diverging beams
S. Palit, Sandip K. Chakrabarti, D. Debnath +4
We present the results of simulations of shadows cast by a zone plate telescope which may have one to four pairs of zone plates. From the shadows we reconstruct the images under va…
Fresnel zone plate telescopes for X-ray imaging I: experiments with a quasi-parallel beam
Sandip K. Chakrabarti, S. Palit, D. Debnath +3
Combination of Fresnel Zone Plates (FZP) can make an excellent telescope for imaging in X-rays. We present here the results of our experiments with several pairs of tungsten made F…
Spectral and timing evolution of GRO J1655-40 during its outburst of 2005
D. Debnath, Sandip K. Chakrabarti, A. Nandi +1
In a recent outburst which lasted for 260 days, the black hole candidate GRO J1655-40 exhibited a behaviour similar to its last outburst observed almost eight years ago. We analyze…
Instruments of RT-2 Experiment onboard CORONAS-PHOTON and their test and evaluation V: Onboard software, Data Structure, Telemetry and Telecommand
S. Sreekumar, P. Vinod, Essy Samuel +9
The onboard software and data communication in the RT-2 Experiment onboard the Coronas-Photon satellite is organized in a hierarchical way to effectively handle and communicate asy…
Improving 1D stellar atmosphere models with insights from multi-dimensional simulations I. 1D vs 2D stratifications and spectral comparison for O stars
G. González-TorÃ, A. A. C. Sander, J. O. Sundqvist +7
We compare current 1D and multi-dimensional atmosphere modelling approaches for massive stars to understand their strengths and shortcomings. We calculate averaged stratifications…