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astro-ph2008★ 63 cited
The Quintuplet Cluster I. A K-band spectral catalog of stellar sources
A. Liermann, W. -R. Hamann, L. M. Oskinova
Three very massive clusters are known to reside in the Galactic Center region, the Arches cluster, the Quintuplet cluster and the Central parsec cluster. We obtained spectroscopic…
astro-ph2008★ 10 cited
Puzzling X-rays from the new colliding wind binary WR65
L. M. Oskinova, W. -R. Hamann
We report the discovery of variability in the X-ray emission from the Wolf-Rayet type star WR 65. Using archival Chandra data spanning over 5 yr we detect changes of the X-ray flux…
astro-ph2008★ 3 cited
X-raying clumped stellar winds
L. M. Oskinova, W. -R. Hamann, A. Feldmeier
X-ray spectroscopy is a sensitive probe of stellar winds. X-rays originate from optically thin shock-heated plasma deep inside the wind and propagate outwards throughout absorbing…