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The fossil wind structures of Eta Carinae: changes across on 5.54-year cycle
Theodore R. Gull, Thomas I. Madura, Mairan Teodoro +11
Eta Carinae, the closest, active, massive binary containing a highly unstable LBV, exhibits expanding, compressed wind shells, seen in emission, that are spatially and spectrally r…
Discovery of Rapidly Moving Partial X-ray Absorbers within gamma Cassiopeiae
K. Hamaguchi, L. Oskinova, C. M. P. Russell +4
Gamma Cassiopeiae is an enigmatic Be star with unusually strong hard X-ray emission. The Suzaku observatory detected six rapid X-ray spectral hardening events called "softness dips…
The Quiescent Intracluster Medium in the Core of the Perseus Cluster
Hitomi Collaboration, Felix Aharonian, Hiroki Akamatsu +213
Clusters of galaxies are the most massive gravitationally-bound objects in the Universe and are still forming. They are thus important probes of cosmological parameters and a host…
To and beyond! The He I absorption variability across the 2014.6 periastron passage of Carinae
Noel D. Richardson, Thomas I. Madura, Lucas St-Jean +11
We have monitored the massive binary star Carinae with the CTIO/SMARTS 1.5~m telescope and CHIRON spectrograph from the previous apastron passage of the system through the rece…
Modelling the Central Constant Emission X-ray component of eta Carinae
Christopher M. P. Russell, Michael F. Corcoran, Kenji Hamaguchi +3
The X-ray emission of Carinae shows multiple features at various spatial and temporal scales. The central constant emission (CCE) component is centred on the binary and arises…
Eta Carinae's Thermal X-ray Tail Measured with XMM-Newton and NuSTAR
Kenji Hamaguchi, Michael F. Corcoran, Theodore R. Gull +12
The evolved, massive highly eccentric binary system, eta Carinae, underwent a periastron passage in the summer of 2014. We obtained two coordinated X-ray observations with XMM-Newt…