51 citations · 146 across the 5 of their papers we have counts for
5 papers
Altair - the 'hottest' magnetically active star in X-rays
J. Robrade, J. H. M. M. Schmitt
The A7 star Altair is one of the hottest magnetically active stars. Its proximity to the Sun allows a detailed investigation of a corona in X-rays for a star with a shallow convect…
X-ray emission from the M9 dwarf 1RXS J115928.5-524717 - Quasi-quiescent coronal activity at the end of the main sequence
J. Robrade, J. H. M. M. Schmitt
Methods: We analyse an XMM-Newton observation of 1RXS J115928.5-524717, an ultracool dwarf with spectral type M9 and compare its X-ray properties to those of other similar very lat…
Further X-ray detections of Herbig stars
B. Stelzer, J. Robrade, J. H. M. M. Schmitt +1
The interpretation of X-ray detections from Herbig Ae/Be stars is disputed as it is not clear if these intermediate-mass pre-main sequence stars are able to drive a dynamo and ensu…
Quiescent X-ray emission from the M9 dwarf LHS 2065
J. Robrade, J. H. M. M. Schmitt
We investigate an archival XMM-Newton observation of LHS 2065, an ultracool dwarf with spectral type M9. We clearly detect LHS 2065 at soft X-ray energies in less than 1 h effectiv…
Doppler imaging an X-ray flare on the ultrafast rotator BO Mic - A contemporaneous multiwavelength study using XMM-Newton and VLT
U. Wolter, J. Robrade, J. H. M. M. Schmitt +1
We present an analysis of contemporaneous photospheric, chromospheric and coronal structures on the highly active K-dwarf star BO Mic (Speedy Mic). We localize a moderate flare in…