X-Ray Emission from the Exoplanet Hosting LTT 1445 Triple Star System

X-ray emission from star-forming galaxies

X-ray Emission from the FU Orionis Star V1735 Cygni

The variable star V1735 Cyg (= Elias 1-12) lies in the IC 5146 dark cloud and is a member of the class of FU Orionis objects whose dramatic optical brightenings are thought to be linked to episodic accretion. We report the first X-ray detections of V1735 Cyg and a deeply-embedded class I protostar lying 24 to its northeast. X-ray spectra obtained with EPIC on XMM-Newton reveal very hightemperat...

Evolution of X-ray emission from young massive star clusters

The evolution of X-ray emission from young massive star clusters is modeled, taking into account the emission from the stars as well as from the cluster wind. It is shown that the level and character of the soft (0.2-10 keV) X-ray emission change drastically with cluster age and are tightly linked with stellar evolution. Using the modern X-ray observations of massive stars we show that the corr...

Extraordinarily Hot X - Ray Emission from the O 9 Emission Line Star Hd 119682

We present new optical and X-ray observations to show that the X-ray source 1WGA J1346.5−6255 previously associated with the SNR G309.2-0.6 can be unequivocally identified with the emission line star HD 119682 located in the foreground open cluster NGC 5281. Images from Chandra in the X-ray band as well as from Magellan in the narrow optical Hα band show a coincidence of the source positions wi...

Gamma-Ray Emission from X-Ray Binaries

We summarize the current observational picture regarding high-energy emission from Galactic X-ray binaries, reviewing the results of the Compton Gamma Ray Observatory mission. We speculate on the prospects for the GLAST era.