Stellar wind-emission features in the spectrum of eta Carinae have decreased by factors of
1.5–3 relative to the continuum within the last 10 years. We investigate a large data set from …

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 …

We analyze spatially resolved spectroscopic observations of the Eta Carinae binary system
obtained with the Hubble Space Telescope/STIS. Eta Car is enshrouded by the dusty …

The highly eccentric binary system, η Car, provides clues to the transition of massive stars
from hydrogen–burning via the CNO cycle to a helium–burning evolutionary state. The fast …

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 …

Eta Carinae's spectroscopic events (periastron passages) in 2003, 2009, and 2014 differed
progressively. He ii λ4687 and nearby N ii multiplet 5 have special significance because …

The Homunculus reflection nebula around η Carinae provides a rare opportunity to observe
the spectrum of a star from more than one direction. In the case of η Car, the nebula's …

ABSTRACT We report new Hubble Space Telescope/Space Telescope Imaging
Spectrograph observations that map the high-ionization forbidden line emission in the inner …

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 …

We present high spectral resolution echelle observations of the Balmer line variations during
the 2003.5" spectroscopic event" of η Carinae. Spectra have been recorded of both η Car …