The optical spectra of some stars exhibit spectral lines in emission, which is characteristic of
them having powerful radiatively driven winds. These stars are known as emission-line …

Determining accurate orbits of binary stars with powerful winds is challenging. The dense
outflows increase the effective photospheric radius, precluding direct observation of the …

ABSTRACT η Carinae is an extremely luminous and energetic colliding-wind binary. The
combination of its orbit and orientation, with respect to our line of sight, enables direct …

Hot luminous stars are characterized by their fast, dense and persistent outflows. Here, we
analyze the unambiguous spectroscopic signatures of the presence of these winds. We then …

The observed orbits of emission-line stars may be affected by systematics owing to their
broad emission lines being formed in complex and extended environments. This is …

The emission line spectra of WR stars are often formed completely in the optically thick
stellar wind. Hence, any assumption on the wind velocity law in a spectral analysis has a …

Our primary goal is to constrain the physical properties of Eta Car's wind-wind collision
region and the properties of Eta Car B, the hot, very massive secondary companion that is …

Eta Carinae is considered to be a massive colliding wind binary system with a highly
eccentric (e\sim 0.9), 5.54-yr orbit. However, the companion star continues to evade direct …

Spectral observations of the massive colliding wind binary Eta Carinae show phase-
dependent variations, in intensity and velocity, of numerous helium emission and absorption …

We use high-resolution 3D hydrodynamical simulations to quantify the amount of mass
accreted on to the secondary star of the binary system Eta Carinae, exploring two sets of …