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 …

Cosmic-ray acceleration has been a long-standing mystery, and, despite more than a
century of study, we still do not have a complete census of acceleration mechanisms. The …

We present a model for the creation of non-thermal particles via diffusive shock acceleration
in a colliding-wind binary. Our model accounts for the oblique nature of the global shocks …

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 report high-precision X-ray monitoring observations in the 0.4–10 keV band of the
luminous, long-period colliding wind binary Eta Carinae, up to and through its most recent X …

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 …

The binary system η Carinae is a unique laboratory that facilitates the study of particle
acceleration to high energies under a wide range of conditions, including extremely high …

We investigate the structure and X-ray emission from the colliding stellar winds in massive
star binaries. We find that the opening angle of the contact discontinuity (CD) is …

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 …

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