36 citations · 118 across the 6 of their papers we have counts for
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Neon and Chemical Fractionation Trends in Late-type Stellar Atmospheres
D. Garcia-Alvarez, J. J. Drake, P. Testa
A survey of Ne, O and Fe coronal abundances culled from the recent literature for about 60 late-type stars confirms that the Ne/O ratio of stellar outer atmospheres is about two ti…
Fe K alpha and hydrodynamic loop model diagnostics for a large flare on II Peg
Barbara Ercolano, Jeremy J. Drake, Fabio Reale +2
The observation by the Swift X-ray Telescope of the Fe K alpha_1, alpha_2 doublet during a large flare on the RS CVn binary system II Peg represents one of only two firm detections…
Testing magnetically confined wind shock models for Beta Cep using XMM-Newton and Chandra phase-resolved X-ray observations
F. Favata, C. Neiner, P. Testa +2
(abridged) We have performed a set of phase-resolved X-ray observations of the magnetic B star Beta Cep, for which theoretical models predict the presence of a confined wind emitti…
Geometry Diagnostics of a Stellar Flare from Fluorescent X-rays
P. Testa, J. J. Drake, B. Ercolano +5
We present evidence of Fe fluorescent emission in the Chandra HETGS spectrum of the single G-type giant HR 9024 during a large flare. In analogy to solar X-ray observations, we int…
On X-ray Optical Depth in the Coronae of Active Stars
Paola Testa, Jeremy J. Drake, Giovanni Peres +1
We have investigated the optical thickness of the coronal plasma through the analysis of high-resolution X-ray spectra of a large sample of active stars observed with the High Ener…
X-ray Variability in the Young Massive Triple theta2 Ori A
Norbert S. Schulz, Paola Testa, David P. Huenemoerder +2
Massive stars rarely show intrinsic X-ray variability. The only O-stars credited to be intrinsically variable are theta1 Ori C due to effects from magnetic confinement of its wind,…