177 citations · 3.1k across the 81 of their papers we have counts for
6 papers · 1 filter
Magnetic fields in X-ray emitting A-type stars
C. Schroeder, S. Hubrig, J. H. M. M. Schmitt
A common explanation for the observed X-ray emission of A-type stars is the presence of a hidden late-type companion. While this hypothesis can be shown to be correct in some cases…
The nature of the fluorescent iron line in V 1486 Ori
S. Czesla, J. H. H. M. Schmitt
The fluorescent 6.4 keV iron line provides information on cool material in the vicinity of hard X-ray sources as well as on the characteristics of the X-ray sources themselves. Fir…
X-rays from RU Lupi - Accretion and winds in CTTS
J. Robrade, J. H. M. M. Schmitt
Using three XMM-Newton observations we study the X-ray emission of RU Lup, a accreting and wind-driving CTTS. In comparison with other bright CTTS we study possible signatures of a…
Are magnetic hot stars intrinsic X-ray sources ?
S. Czesla, J. H. H. M. Schmitt
Context: X-ray surveys carried out with the Einstein and ROSAT satellites have resulted in rather unexpected detections of X-ray emission from late B-type and early A-type stars. T…
Rapid magnetic flux variability on the flare star CN Leonis
A. Reiners, J. H. M. M. Schmitt, C. Liefke
We present UVES/VLT observations of the nearby flare star CN Leo covering the Wing-Ford FeH band near 1mu with high spectral resolution. Some of the FeH absorption lines in this ba…
X-ray emission from classical T Tauri stars: Accretion shocks and coronae?
H. M. Guenther, J. H. M. M. Schmitt, J. Robrade +1
Classical T Tauri stars (CTTS) are surrounded by actively accreting disks. According to current models material falls along the magnetic field lines from the disk with more or less…