Galaxies living in rich environments are suffering different perturbations able to drastically
affect their evolution. Among these, ram pressure stripping, ie the pressure exerted by the …

Astronomical observations reveal a major deficiency in our understanding of physics—the
detectable mass is insufficient to explain the observed motions in a huge variety of systems …

Star and planet formation are the complex outcomes of gravitational collapse and angular
momentum transport mediated by protostellar and protoplanetary disks. In this review, we …

We use the second data releases of the European Space Agency Gaia astrometric survey
and the high-resolution Galactic Archaeology with HERMES (GALAH) spectroscopic survey …

The kinematics of the Milky Way disc as a function of age are well measured at the solar
radius, but have not been studied over a wider range of Galactocentric radii. Here, we …

Using the photometric parallax method we estimate the distances to∼ 48 million stars
detected by the Sloan Digital Sky Survey (SDSS) and map their three-dimensional number …

We show that spiral waves in galaxy discs churn the stars and gas in a manner that largely
preserves the overall angular momentum distribution and leads to little increase in random …

Thin, Keplerian accretion disks generically become gravitationally unstable at large radii. I
investigate the nonlinear outcome of such instability in cool disks using razor-thin, local …

The transformations that take place in late‐type galaxies in the environment of rich clusters
of galaxies at z= 0 are reviewed. From the handful of late‐type galaxies that inhabit local …

The spatial, kinematic, and elemental-abundance structure of the Milky Way's stellar disk is
complex, and has been difficult to dissect with local spectroscopic or global photometric …