Search Publications
A study of the main resonances outside the geostationary ring
Celletti, Alessandra; Galeş, Cătălin
We investigate the dynamics of satellites and space debris in external resonances, namely in the region outside the geostationary ring. Precisely, we focus on the 1:2, 1:3, 2:3 resonances, which are located at about 66 931.4 km, 87 705.0 km, 55 250.7 km, respectively. Some of these resonances have been already exploited in space missions, like XMM…
Discovery of new X-ray sources near the unidentified gamma-ray source HESS J1841-055
Koyama, K.; Nobukawa, M.; Tsuru, T. G. +1 more
HESS J1841-055 is a diffuse unidentified gamma-ray source with the size of ∼1°.3 × 1°. No conclusive counterpart in other wavelengths has so far detected. To search for X-rays responsible for the TeV emission, the Suzaku observations were conducted, which covered a half region of the HESS source. In the soft band (0.5-2.0 keV), we discovered a dif…