Doppler spectroscopy is a powerful tool for discovering and characterizing exoplanets. For
decades, the standard approach to extracting radial velocities (RVs) has been to cross …

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 …

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 …

ABSTRACT Eta Carinae (η Car) is an extremely massive binary system in which rapid
spectrum variations occur near periastron. Most notably, near periastron the He ii λ4686 line …

We analyse photometric observations of the supernova (SN) impostor SN 2000ch in NGC
3432 covering the time since its discovery. This source was previously observed to have four …

We report on Swift X-ray Telescope observations of Eta Carinae (η Car), an extremely
massive, long-period, highly eccentric binary obtained during the 2014.6 X-ray …

We present new X-ray and UV observations of the Wolf–Rayet+ black hole (BH) binary
system NGC 300 X-1 with the Chandra X-ray Observatory and the Hubble Space Telescope …

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 …

Aims. Every 5.5 years, η Car's light curve and spectrum change remarkably across all
observed wavelength bands. These so-called spectroscopic events are most likely caused …

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 …