v 1 16 N ov 1 99 8 Mergers and Galaxy Assembly

2 v 1 1 6 N ov 1 99 8 Mergers and Galaxy Assembly

Theoretical considerations and observational data support the idea that mergers were more frequent in the past. At redshifts z = 2 to 5, violent interactions and mergers may be implicated by observations of Lyman-break galaxies, sub-mm starbursts, and active galactic nuclei. Most stars in cluster ellipticals probably formed at such redshifts, as did most of the halo and globular clusters of the...

v 2 6 N ov 1 99 8 ELLIPTICAL GALAXY DYNAMICS

ar X iv : a st ro - p h / 99 11 51 4 v 1 3 0 N ov 1 99 9 The formation and evolution of supermassive black holes and their host galaxies

We discuss constraints on the assembly history of supermassive black holes from the observed remnant black holes in nearby galaxies and from the emission caused by accretion onto these black holes. We also summarize the results of a specific model for the evolution of galaxies and their central black holes which traces their hierachical build-up in CDM-like cosmogonies. The model assumes (i) th...

ar X iv : a st ro - p h / 99 11 37 8 v 1 1 9 N ov 1 99 9 Where are the First Stars now ?

We use high-resolution simulations to show that the current standard paradigm for the growth of structure in the Universe predicts the formation of a galaxy like our own to differ substantially from the classic ELS and Searle/Zinn pictures. On scales larger than the Local Group, the earliest star formation was extremely inhomogeneous, suggesting that the high redshift intergalactic medium shoul...

ar X iv : a st ro - p h / 99 08 18 8 v 1 1 7 A ug 1 99 9 ISO Images of Starbursts and Active Galaxies

We present some highlights from the mid-infrared (5-16 μm) images of mergers of massive galaxies obtained with the Infrared Space Observatory (ISO). We have observed: 1) ultraluminous infrared nuclei, 2) luminous dust-enshrouded extranuclear starbursts, and 3) active galaxy nuclei (AGNs). In this contribution we discuss the observations of Arp 299, a prototype for very luminous infrared galaxie...