We review current understanding of star formation, outlining an overall theoretical framework
and the observations that motivate it. A conception of star formation has emerged in which …

Jets are ubiquitous in the Universe and are seen from a large number of astrophysical
objects including active galactic nuclei, gamma ray bursters, micro-quasars, proto-planetary …

Context. Accretion disks and astrophysical jets are used to model many active astrophysical
objects, such as young stars, relativistic stars, and active galactic nuclei. However, existing …

Aims. The collimation of relativistic jets in galaxies is a poorly understood process. Detailed
radio studies of the jet collimation region have been performed so far in a few individual …

With the aim of characterizing the dynamical processes involved in the formation of young
protostars, we present highangular-resolution ALMA dust polarization observations of the …

Long-lived, stable jets are observed in a wide variety of systems, from protostars, through
Galactic compact objects to active galactic nuclei (AGN). Magnetic fields play a central role …

We present a study of X-ray ionization of MHD accretion-disk winds in an effort to constrain
the physics underlying the highly ionized ultra-fast outflows (UFOs) inferred by X-ray …

The goal of this paper is to derive signatures of synchrotron radiation from state-of-the-art
simulation models of collimating relativistic magnetohydrodynamic (MHD) jets featuring a …

Relativistic jets and disc-winds are typically observed in black hole X-ray binaries (BH-
XRBs) and active galactic nuclei. However, many physical details of jet launching and the …

Magnetic fields are fundamental to the dynamics of both accretion disks and the jets that
they often drive. We review the basic physics of these phenomena, the past and current …