3 papers
astro-ph.SR2025
Forbush Decreases during strong Geomagnetic Storms: Time Delays, Rigidity Effects, and ICME-Driven Modulation
O. Ahmed, B. Badruddin, M. Derouich
We investigate the relationship between Forbush decreases (FDs) and associated geomagnetic storms, and their links to interplanetary solar wind parameters, using high-resolution mi…
astro-ph.HE2024
X-ray observations of the very-faint X-ray transient XMMSL1 J171900.4--353217: A new candidate neutron star low-mass X-ray binary
O. Ahmed, N. Degenaar, R. Wijnands +1
XMMSL1 J171900.4-353217 is a very-faint X-ray transient that was discovered in 2010 March when it exhibited an outburst. We report on 7 observations, obtained with the X-Ray Telesc…
physics.space-ph2024
Dynamics and solar wind control of the recovery of strong geomagnetic storms
O. Ahmed, B. Badruddin, M. Derouich
In this work, we studied the characteristics and dynamical changes during the recovery time of moderate and strong geomagnetic storms (Dst nT). Investigating 57 storms trigg…