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 …
A Damineli, DJ Hillier, MF Corcoran… - Monthly Notices of …, 2008 - academic.oup.com
Extensive spectral observations of η Carinae over the last cycle, and particularly around the 2003.5 low-excitation event, have been obtained. The variability of both narrow and broad …
M Feast, P Whitelock, F Marang - Monthly Notices of the Royal …, 2001 - academic.oup.com
Abstract Spectra (1951–78) of the central object in η Car, taken by AD Thackeray, reveal three previously unrecorded epochs of low excitation. Since 1948, at least, these states have …
Context. The periodicity of 5.5 years for some observational events occurring in η Carinae manifests itself across a large wavelength range and has been associated with its binary …
Damineli et al.(1997)[NewA, 2, 107] have recently proposed a specific binary model for η Carinae. It is based on wavelength shifts in hydrogen and helium emission lines, and may …
The periodic events occurring in η Carinæ have been widely monitored during the last three 5.5-year cycles. The last one recently occurred in January 2009 and more exhaustive …
ABSTRACT The interacting binary Eta Carinae remains one of the most enigmatic massive stars in our Galaxy despite over four centuries of observations. In this work, its light curve …
A Damineli - The Astrophysical Journal, 1996 - iopscience.iop.org
ABSTRACT I have discovered spectroscopic variations correlated with the photometric near- infrared (NIR) light curve in &eegr; Carinae. The fading of the high-excitation lines is …
PA Whitelock, MW Feast, F Marang… - Monthly Notices of the …, 2004 - academic.oup.com
Near-infrared, JHKL, photometry of η Car is reported covering the period 2000–2004. This includes the 2003 shell event which was the subject of an international multiwavelength …