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5 papers · 1 filter
Turbulence and the formation of filaments, loops and shock fronts in NGC 1275 in the Perseus Galaxy Cluster
D. Falceta-Goncalves, E. M. de Gouveia Dal Pino, J. S. Gallagher +1
NGC1275, the central galaxy in the Perseus cluster, is the host of gigantic hot bipolar bubbles inflated by AGN jets observed in the radio as Perseus A. It presents a spectacular $…
XMM-Newton Observations of a Complete Sample of Optically Selected Type 2 Seyfert Galaxies
Stephanie M. LaMassa, Timothy M. Heckman, Andrew A. Ptak +4
(abridged)The majority of Active Galactic Nuclei (AGN) suffer from significant obscuration by surrounding dust and gas. X-ray surveys in the 2-10 keV band will miss the most heavil…
Precession and Nutation in the eta Carinae binary system: Evidences from the X-ray light curve
Z. Abraham, D. Falceta-Goncalves
It is believed that eta Carinae is actually a massive binary system, with the wind-wind interaction responsible for the strong X-ray emission. Although the overall shape of the X-r…
Cross-entropy optimiser: a new tool to study precession in astrophysical jets
A. Caproni, H. Monteiro, Z. Abraham
Evidence of jet precession in many galactic and extragalactic sources has been reported in the literature. Much of this evidence is based on studies of the kinematics of the jet kn…
Constraining the orbital orientation of Eta Carinae from H Paschen lines
D. Falceta-Goncalves, Z. Abraham
During the past decade several observational and theoretical works provided evidences of the binary nature of Eta Carinae. Nevertheless, there is still no direct determination of t…