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Cepheids at high angular resolution: circumstellar envelope and pulsation
Alexandre Gallenne
In 2005, interferometric observations with VLTI/VINCI and CHARA/FLUOR revealed the existence of a circumstellar envelope (CSE) around some Cepheids. This surrounding material is pa…
Thermal infrared properties of classical and type II Cepheids Diffraction limited 10 microns imaging with VLT/VISIR
Alexandre Gallenne, Pierre Kervella, Antoine Mérand
We present new thermal IR photometry and spectral energy distributions (SEDs) of eight classical Cepheids (type I) and three type II Cepheids, using VISIR thermal IR photometric me…
Spatially extended emission around the Cepheid RS Puppis in near-infrared hydrogen lines. Adaptive optics imaging with VLT/NACO
Alexandre Gallenne, Antoine Mérand, Pierre Kervella +1
It has been recently discovered that Cepheids harbor circumstellar envelopes (CSEs). RS Pup is the Cepheid that presents the most prominent circumstellar envelope known, the origin…