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8 papers · 2 filters
On the integrability of stellar motion in an accelerated logarithmic potential
Fathi Namouni, Massimiliano Guzzo, Elena Lega
An accelerated logarithmic potential models the mean motion of stars in a flat rotation curve galaxy that sustains a wind system. For stars outside the galactic wind launching regi…
A search for diffuse bands in the circumstellar envelopes of post-AGB stars
R. Luna, N. L. J. Cox, M. A. Satorre +3
In this work we present the results of a systematic search for diffuse bands (DBs, hereafter) in the circumstellar envelopes of a carefully selected sample of post-AGB stars. We co…
The environment of the fast rotating star Achernar - High-resolution thermal infrared imaging with VISIR in BURST mode
Pierre Kervella, Armando Domiciano De Souza
Context: The geometry of the circumstellar envelopes (CSE) surrounding Be stars is still uncertain, although it is often assumed that they are formed by a disk around the stellar e…
A scene model of exosolar systems for use in planetary detection and characterisation simulations
Adrian Belu, Eric Thiébaut, Marc Ollivier +3
Instrumental projects that will improve the direct optical finding and characterisation of exoplanets have advanced sufficiently to trigger organized investigation and development…
Gamma-ray emission from dark matter wakes of recoiled black holes
Roya Mohayaee, Jacques Colin, Joe Silk
A new scenario for the emission of high-energy gamma-rays from dark matter annihilation around massive black holes is presented. A black hole can leave its parent halo, by means of…
Speckle noise and dynamic range in coronagraphic images
Rémi Soummer, André Ferrari, Claude Aime +1
This paper is concerned with the theoretical properties of high contrast coronagraphic images in the context of exoplanet searches. We derive and analyze the statistical properties…