372 citations · 1.4k across the 26 of their papers we have counts for
6 papers · 2 filters
Flares from small to large: X-ray spectroscopy of Proxima Centauri with XMM-Newton
M. Guedel, M. Audard, F. Reale +2
(Abridged) We report results from a comprehensive study of the nearby M dwarf Proxima Centauri with the XMM-Newton satellite. We find strongly variable coronal X-ray emission, with…
Modeling an X-ray Flare on Proxima Centauri: evidence of two flaring loop components and of two heating mechanisms at work
F. Reale, M. Guedel, G. Peres +1
We model in detail a flare observed on Proxima Centauri with the EPIC-PN on board XMM-Newton at high statistics and high time resolution and coverage. Time-dependent hydrodynamic l…
Coronae of Cool Stars
M. Audard, S. A. Drake, M. Güdel +6
We present preliminary results of grating observations of YY Mensae and V824 Arae by Chandra and XMM-Newton. Spectral features are presented in the context of the emission measure…
The X-ray spectra of the flaring and quiescent states of AT Microscopii observed by XMM-Newton
A. J. J. Raassen, R. Mewe, M. Audard +1
The X-ray spectrum of the late-type M-dwarf binary AT Mic (dM4.5e+dM4.5e) is observed in the wavelength range 1 - 40 Angstrom by means of rgs and epic-mos on board XMM-Newton. Duri…
Are stellar coronae optically thin in X-rays? - A systematic investigation of opacity effects
J. -U. Ness, J. H. M. M. Schmitt, M. Audard +2
The relevance of resonant scattering (absorption by photo-excitation and re-emission out of the line of sight) in the solar corona has always been discussed controversially. Ratios…
Separating the X-Ray Emissions of UV Ceti A and B with Chandra
Marc Audard, Manuel Guedel, Stephen L. Skinner
We present the first spatially separated X-ray observation of the active UV Ceti binary with \textit{Chandra}, providing important new information on the relative X-ray activity le…