Outflows and extended [C ii] haloes in high-redshift galaxies

High-redshift Galaxy Outflows and the Formation of Dwarf Galaxies

We examine the effects of galaxy outflows on the formation of dwarf galaxies in numerical simulations of the high-redshift Universe. Using a Smoothed Particle Hydrodynamic code, we conduct two detailed simulations of a (5.2 Mpc/h) comoving volume of the Universe. In both simulations we implement simple, well-motivated models of galaxy identification and star formation, while our second simulati...

Cosmic ray driven outflows from high redshift galaxies

We study winds in high redshift galaxies driven by a relativistic cosmic ray (proton) component in addition to the hot thermal gas component. Cosmic rays (CRs) are likely to be efficiently generated in supernova (SNe) shocks inside galaxies. We obtain solutions of such CR driven free winds in a gravitational potential of the Navarro-Frenk-White (NFW) form, relevant to galaxies. Cosmic rays natu...

Ionization of large-scale absorbing haloes and feedback events from high-redshift radio galaxies

Aims. We present photoionization calculations for the spatially extended absorbers observed in front of the extended emission line spectrum of two high redshift radio-galaxies: 0943–242 (ze = 2.922) and 0200+015 (ze = 2.230), with the aim of reproducing the absorber column ratio, NCIV/NHI. Methods. We explore the effects of using different UV continua in the photoionization calculations. A comp...

Galaxies at High Redshift

Galaxies at High Redshift

Within just the last few years, we have advanced from knowing only a few galaxies at z > 2 to having redshifts for nearly 1000 z ∼ 2–5 objects. The majority of this sample has been detected through the photometric “dropout” technique used so successfully by Steidel and his collaborators. In addition, a handful of objects have already been detected at z > 5, and we may already have a few objects...