ABSTRACT The Milky Way’s stellar disc can tilt in response to torques that result from infalling satellite galaxies and their associated tidal debris. In this work, we explore the dynamics of tilting by running N-body simulations mergers an isolated, isotropic Way-like host galaxy, varying over virial mass, initial position, orbit. We develop validate a first-principles understanding govern how...

we study local stability of self-gravitating fluid and stellar disk in the context of modified gravity theories which predict a yukawa-like term in the gravitational potential of a point mass. we investigate the effect of such a yukawa-like term on the dynamics of self-gravitating disks. more specifically, we investigate the consequences of the presence of this term for the local stability of t...

We present new central stellar velocity dispersion measurements for 428 galaxies in the Palomar spectroscopic survey of bright, northern galaxies. Of these, 142 have no previously published measurements, most being relatively late-type systems with low velocity dispersions (∼<100 km s −1). We provide updates to a number of literature dispersions with large uncertainties. Our measurements are ba...