We discuss the history of X-ray observations of the η Car system, concentrating on the
periodic variability discovered in the 1990s. We discuss the interpretation of these variations …

We present monitoring observations by the Rossi X-Ray Timing Explorer of the 2–10 keV X-
ray emission from the supermassive star η Carinae from 1996 through late 2003. These data …

It is believed that η Carinae is actually a massive binary system, with the wind–wind
interaction responsible for the strong X-ray emission. Although the overall shape of the X-ray …

Eta Carinae is the nearest example of a supermassive, superluminous, unstable star. Mass
loss from the system is critical in shaping its circumstellar medium and in determining its …

Following the proposal by Damineli that the central object of Eta Carinae may be an early-
type binary, we perform numerical simulations of the X-ray emission from colliding stellar …

Recent studies by Damineli and coworkers suggest that the supermassive star η Carinae
may have a massive stellar companion, although the dense ejecta surrounding the star …

We study the usage of the X-ray light curve, column density towards the hard X-ray source,
and emission measure (density square times volume), of the massive binary system η …

We calculate the X-ray luminosity and light curve for the stellar binary system η Car for the
entire orbital period of 5.54 yr. By using a new approach we find, as suggested in previous …

Ground-based spectroscopy of η Car shows periodic changes in some emission-line
wavelengths. These variations have been cited as strong evidence that this object is a 5.5 yr …

An 85-day periodicity in the X-ray emission of Eta Carinae has been reported, while
spectrocopic events recur with a period of 5.5 years (Corcoran et al., 1997 [Natur, 390, 587]; …