In late 2006, ground-based photometry of η Car plus the Homunculus showed an
unexpected decrease in its integrated apparent brightness, an apparent reversal of its long …

We have measured the brightness variations in η Carinae for the past 6 years using the
Hubble Space Telescope (HST) Space Telescope Imaging Spectrograph and Advanced …

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 …

Abstract HST/Space Telescope Imaging Spectrograph data show that the apparent near-UV,
visual-wavelength, and near-IR brightness of η Car increased by a factor of two during 1998 …

Aims. Eta Car's ultra-violet, optical, and X-ray light curves and its spectrum suggest a
physical change in its stellar wind over the last decade. It has been proposed that the mass …

We report on high-resolution spectroscopy of the 2009.0 spectroscopic event of η Carinae
collected via SMARTS observations using the CTIO 1.5 m telescope and echelle …

Abstract Eta Carinae (η Car) exhibits a unique set of P Cygni profiles with both broad and
narrow components. Over many decades, the spectrum has changed—there has been an …

A comparison of broad-band photometry of the Homunculus (ground-based data) and of
broad-band and narrow-band photometry of the central region (HST-based) from 1997 to …

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 …

The motivations for a meeting on h Carinae at this time were many–the remarkable
discoveries in the past few years about the spectra of the star and its ejecta, the bipolar …