Collimated outflows (jets) appear to be a ubiquitous phenomenon associated with the
accretion of material onto a compact object. Despite this ubiquity, many fundamental physics …

High mass X-ray binaries are among the brightest X-ray sources in the Milky Way, as well as
in nearby Galaxies. Thanks to their highly variable emissions and complex phenomenology …

X-ray polarimetry promises to deliver unique information about the geometry of the inner
accretion flow of astrophysical black holes and the nature of matter and electromagnetism in …

The sky at MeV energies is currently poorly explored. Here we present an innovative
mission concept that builds upon the heritage of past and current missions improving the …

Generation of circularly polarized (CP) and linearly polarized (LP) γ rays via the single-shot
interaction of an ultraintense laser pulse with a spin-polarized counterpropagating …

We present a multi-epoch hard X-ray analysis of Cygnus X-1 in its soft state based on four
observations with the Nuclear Spectroscopic Telescope Array (NuSTAR). Despite the basic …

Most transient black hole X-ray binaries (BHXBs) spend the bulk of their time in a quiescent
state, where they accrete matter from their companion star at highly sub-Eddington …

Particle acceleration in magnetized relativistic jets still puzzles theorists. In this work, we
investigate the acceleration of particles injected into a three-dimensional relativistic …

Operational since 2002 on board the INTEGRAL observatory, the SPI spectrometer can be
used to perform polarization measurements in the hard X-ray/softγ-ray domain (∼ 130 keV …

In this Astro2020 APC White Paper, we describe a Small Explorer (SMEX) mission concept
called the Compton Spectrometer and Imager. COSI is a Compton telescope that covers the …