activity
20042024
most citedThe "Solar Model Problem" Solved by the Abundance of Neon in Stars of the Local Cosmos

204 citations · 3.1k across the 72 of their papers we have counts for

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14 papers · 1 filter

astro-ph2008★ 14 cited

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…

astro-ph2008★ 19 cited

X-ray Emission from Young Stellar Objects in the εChamaeleontis Group: the Herbig Ae Star HD 104237 and Associated Low-Mass Stars

Paola Testa, David P. Huenemoerder, Norbert S. Schulz +1

We present Chandra-HETGS observations of the Herbig Ae star HD 104237 and the associated young stars comprising lower mass stars, in the 0.15-1.75\msol mass range, in their pre-mai…

astro-ph2008★ 25 cited

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…

astro-ph2007★ 68 cited

Evidence for Accretion in the High-resolution X-ray Spectrum of the T Tauri Star System Hen 3-600

David P. Huenemoerder, Joel H. Kastner, Paola Testa +2

We present high-resolution X-ray spectra of the multiple T Tauri star system Hen 3-600, obtained with the High Energy Transmission Grating Spectrograph on the Chandra X-ray Observa…

astro-ph2007★ 25 cited

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…

astro-ph2007★ 25 cited

Detailed diagnostics of an X-ray flare in the single giant HR 9024

Paola Testa, Fabio Reale, David Garcia-Alvarez +1

We analyze a 96 ks Chandra/HETGS observation of the single G-type giant HR 9024. The high flux allows us to examine spectral line and continuum diagnostics at high temporal resolut…