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X-ray Variability in the Young Massive Triple theta2 Ori A
Norbert S. Schulz, Paola Testa, David P. Huenemoerder +2
Massive stars rarely show intrinsic X-ray variability. The only O-stars credited to be intrinsically variable are theta1 Ori C due to effects from magnetic confinement of its wind,…
Extraordinarily Hot X-ray Emission from the 09 Emission Line Star HD 119682
C. E. Rakowski, N. S. Schulz, S. J. Wolk +1
We present new optical and X-ray observations to show that the X-ray source 1 WGA J1346.5--6255 previously associated with the SNR G309.2--0.6 can be unequivocally identified with…
X-ray Spectroscopy of the Contact Binary VW Cephei
David P. Huenemoerder, Paola Testa, Derek L. Buzasi
Short-period binaries represent extreme cases in the generation of stellar coronae via a rotational dynamo. Such stars are important for probing the origin and nature of coronae in…
Chandra/HETGS Observations of the Capella System: the Primary as a Dominating X-ray Source
Kazunori Ishibashi, Daniel Dewey, David P. Huenemoerder +1
Using the Chandra/High Energy Transmission Grating Spectrometer (hereafter HETGS) we have detected Doppler motion of Capella's X-ray emission lines in the 6 -- 25AA wave-band. The…