Kavli Affiliate: Moritz Guenther
| First 5 Authors: Steven M. Silverberg, Hans Moritz Guenther, Pragati Pradhan, David A. Principe, P. C. Schneider
| Summary:
XZ Tau AB is a frequently observed binary YSO in the Taurus Molecular Cloud;
XZ Tau B has been classified as an EXOr object. We present new
Chandra/HETG-ACIS-S observations of XZ Tau AB, complemented with variability
monitoring of the system with XMM-Newton, to constrain the variability of this
system and identify high-resolution line diagnostics to better understand the
underlying mechanisms that produce the X-rays. We observe two flares with
XMM-Newton, but find that outside of these flares the coronal X-ray spectrum of
XZ Tau AB is consistent over twenty years of observations. We compare the
ensemble of XZ Tau X-ray observations over time with the scatter across stars
observed in point-in-time observations of the Orion Nebula Cluster and find
that both overlap in terms of plasma properties, i.e., some of the scatter
observed in the X-ray properties of stellar ensembles stems from intrinsic
source variability.
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