He ii λ4686 IN η CARINAE: COLLAPSE OF THE WIND–WIND COLLISION REGION DURING PERIASTRON PASSAGE
@article{Teodoro2011HeI, title={He ii $\lambda$4686 IN $\eta$ CARINAE: COLLAPSE OF THE WIND–WIND COLLISION REGION DURING PERIASTRON PASSAGE}, author={M. Teodoro and Augusto Damineli and Julia I. Arias and Francisco X. de Ara{\'u}jo and Rodolfo H. Barb'a and Michael F. Corcoran and M. Borges Fernandes and Eduardo Fern'andez-Laj'us and L Fraga and Roberto C Gamen and J. F. Gonz'alez and Jose H. Groh and Jennifer L. Marshall and Peter J. Mcgregor and Nidia I. Morrell and David C. Nicholls and Elliot Ross Parkin and Claudio Bastos Pereira and Mark M. Phillips and Gladys Rebeca Solivella and Jo{\~a}o Evangelista Steiner and Maximilian D. Stritzinger and Ian B. Thompson and Carlos A. O. Torres and Miguel Angel P{\'e}rez Torres and M. I. Zevallos Herencia}, journal={The Astrophysical Journal}, year={2011}, volume={746} }
The periodic spectroscopic events in η Carinae are now well established and occur near the periastron passage of two massive stars in a very eccentric orbit. Several mechanisms have been proposed to explain the variations of different spectral features, such as an eclipse by the wind–wind collision (WWC) boundary, a shell ejection from the primary star or accretion of its wind onto the secondary. All of them have problems explaining all the observed phenomena. To better understand the nature of…
33 Citations
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- 2016
We have monitored the massive binary star $\eta$ Carinae with the CTIO/SMARTS 1.5~m telescope and CHIRON spectrograph from the previous apastron passage of the system through the recent 2014.6…
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- Physics
- 2012
We present 2D radiative transfer modeling of the Eta Carinae binary system accounting for the presence of a wind-wind collision (WWC) cavity carved in the optically-thick wind of the primary star. By…
X-RAY EMISSION FROM ETA CARINAE NEAR PERIASTRON IN 2009. I. A TWO-STATE SOLUTION
- Physics
- 2014
X-ray emission from the supermassive binary system η Car declines sharply around periastron. This X-ray minimum has two distinct phases—the lowest flux phase in the first ∼3 weeks and a brighter…
The Orientation of Eta Carinae and the Powering Mechanism of Intermediate-luminosity Optical Transients (ILOTS)
- Physics
- 2018
Contrary to recent claims, we argue that the orientation of the massive binary system Eta Carinae is such that the secondary star is closer to us at periastron passage, and it is on the far side…
Simulating the response of the secondary star of Eta Carinae to mass accretion at periastron passage
- PhysicsMonthly Notices of the Royal Astronomical Society
- 2019
We use high resolution 3D hydrodynamical simulations to quantify the amount of mass accreted onto the secondary star of the binary system Eta Carinae, exploring two sets of stellar masses that had…
CRITICAL DIFFERENCES AND CLUES IN ETA CAR'S 2009 EVENT,
- Physics
- 2011
We monitored Eta Carinae with the Hubble Space Telescope WFPC2 and Gemini GMOS throughout the 2009 spectroscopic event, which was expected to differ from its predecessor in 2003. Here we report major…
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