On the influence of the companion star in Eta Carinae: 2D radiative transfer modelling of the ultraviolet and optical spectra

JH Groh, DJ Hillier, TI Madura… - Monthly Notices of the …, 2012 - academic.oup.com
We present two-dimensional (2D) radiative transfer modelling of the Eta Carinae binary
system accounting for the presence of a wind–wind collision (WWC) cavity carved in the …

Constraints on decreases in η Carinae's mass-loss from 3D hydrodynamic simulations of its binary colliding winds

TI Madura, TR Gull, AT Okazaki… - Monthly Notices of …, 2013 - academic.oup.com
Recent work suggests that the mass-loss rate of the primary star ηA in the massive colliding
wind binary η Carinae dropped by a factor of 2–3 between 1999 and 2010. We present …

VLTI-MATISSE chromatic aperture-synthesis imaging of η Carinae's stellar wind across the Brα line-Periastron passage observations in February 2020

G Weigelt, KH Hofmann, D Schertl, B Lopez… - Astronomy & …, 2021 - aanda.org
Context. Eta Carinae is a highly eccentric, massive binary system (semimajor axis~ 15.5 au)
with powerful stellar winds and a phase-dependent wind-wind collision (WWC) zone. The …

Spectroscopic signatures of the vanishing natural coronagraph of Eta Carinae

A Damineli, F Navarete, DJ Hillier… - Monthly Notices of …, 2021 - academic.oup.com
Eta Carinae is a massive interacting binary system shrouded in a complex circumstellar
environment whose evolution is the source of the long-term brightening observed during the …

Fermi acceleration along the orbit of η Carinae

M Balbo, R Walter - Astronomy & Astrophysics, 2017 - aanda.org
Context. The η Carinae binary system hosts one of the most massive stars, which features
the highest known mass-loss rate. This dense wind encounters the much faster wind …

The three-dimensional structure of the Eta Carinae Homunculus

W Steffen, M Teodoro, TI Madura… - Monthly Notices of …, 2014 - academic.oup.com
We investigate, using the modelling code shape, the three-dimensional structure of the
bipolar Homunculus nebula surrounding Eta Carinae as mapped by new ESO Very Large …

The orbital kinematics of η Carinae over three periastra with a possible detection of the elusive secondary's motion

E Strawn, ND Richardson, AFJ Moffat… - Monthly Notices of …, 2023 - academic.oup.com
The binary η Carinae is the closest example of a very massive star, which may have formed
through a merger during its Great Eruption in the mid-19th century. We aimed to confirm and …

Stellar wind models of subluminous hot stars

J Krtička, J Kubát, I Krtičková - Astronomy & Astrophysics, 2016 - aanda.org
Context. Mass-loss rate is one of the most important stellar parameters. Mass loss via stellar
winds may influence stellar evolution and modifies stellar spectrum. Stellar winds of …

3D radiative transfer simulations of Eta Carinae's inner colliding winds–I. Ionization structure of helium at apastron

N Clementel, TI Madura, CJH Kruip… - Monthly Notices of …, 2015 - academic.oup.com
The highly eccentric binary system Eta Carinae (η Car) shows numerous time-variable
emission and absorption features. These observational signatures are the result of …

The fossil wind structures of Eta Carinae: changes across one 5.54-yr cycle

TR Gull, TI Madura, M Teodoro… - Monthly Notices of …, 2016 - academic.oup.com
Eta Carinae, the closest, active, massive binary containing a highly unstable Luminous Blue
Variable, exhibits expanding, compressed wind shells, seen in emission, that are spatially …