150 citations · 1.3k across the 36 of their papers we have counts for
10 papers · 1 filter
Neon and oxygen in low activity stars: towards a coronal unification with the Sun
J. Robrade, J. H. M. M. Schmitt, F. Favata
The disagreement between helioseismology and a recent downward revision of solar abundances has resulted in a controversy about the true neon abundance of the Sun and other stars.…
A coronal explosion on the flare star CN Leonis
J. H. M. M. Schmitt, F. Reale, C. Liefke +4
We present simultaneous high-temporal and high-spectral resolution observations at optical and soft X-ray wavelengths of the nearby flare star CN Leo. During our observing campaign…
On the sizes of stellar X-ray coronae
J. -U. Ness, M. Güdel, J. H. M. M. Schmitt +2
Spatial information from stellar X-ray coronae can be inferred by use of scaling laws from the solar corona. This requires measurement of the physical parameters temperature and de…
Fe XIII coronal line emission in cool M dwarfs
B. Fuhrmeister, J. H. M. M. Schmitt, R. Wichmann
We report on a search for the Fe xiii forbidden coronal line at 3388.1 Åin a sample of 15 M-type dwarf stars covering the whole spectral class as well as different levels of activi…
A spatially resolved limb flare on Algol B observed with XMM-Newton
J. H. M. M. Schmitt, J. -U. Ness, G. Franco
We report XMM-Newton observations of the eclipsing binary Algol A (B8V) and B (K2III). The XMM-Newton data cover the phase interval 0.35 - 0.58, i.e., specifically the time of opti…
Coronal density diagnostics with Helium-like triplets: CHANDRA--LETGS observations of Algol, Capella, Procyon, Eps Eri, Alpha Cen A&B, UX Ari, AD Leo, YY Gem, and HR1099
J. -U. Ness, J. H. M. M. Schmitt, V. Burwitz +5
We present an analysis of ten cool stars (Algol, Capella, Procyon, Eps Eri, Alpha Cen A&B, UX Ari, AD Leo, YY Gem, and HR1099) observed with the Low Energy Transmission Grating Spe…