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X-ray absorption and reflection in active galactic nuclei
Turner, T. J.; Miller, L.
X-ray spectroscopy offers an opportunity to study the complex mixture of emitting and absorbing components in the circumnuclear regions of active galactic nuclei (AGN), and to learn about the accretion process that fuels AGN and the feedback of material to their host galaxies. We describe the spectral signatures that may be studied and review the …
Results from the Huygens probe on Titan
Strobel, Darrell; Coustenis, Athena; Lebreton, Jean-Pierre +3 more
The Cassini-Huygens mission, comprising the NASA Saturn Orbiter and the ESA Huygens Probe, arrived at Saturn in late June 2004. The Huygens probe descended under parachute in Titan's atmosphere on 14 January 2005, 3 weeks after separation from the Orbiter. We discuss here the breakthroughs that the Huygens probe, in conjunction with the Cassini sp…
A review of Titan's atmospheric phenomena
Sotin, Christophe; Le Mouélic, Stéphane; Tokano, Tetsuya +2 more
Saturn’s satellite Titan is a particularly interesting body in our solar system. It is the only satellite with a dense atmosphere, which is primarily made of nitrogen and methane. It harbours an intricate photochemistry, that populates the atmosphere with aerosols, but that should deplete irreversibly the methane. The observation that methane is n…