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This thesis addresses two of the central processes which underpin the formation of galaxies: the formation of stars and the injection of energy into the interstellar medium from supernovae, called feedback. In her work Claudia Lagos has completely overhauled the treatment of these processes in simulations of galaxy formation. Her thesis makes two major breakthroughs, and represents the first major steps forward in these areas in more than a decade. Her work has enabled, for the first time, predictions to be made which can be compared against new observations which probe the neutral gas content of galaxies, opening up a completely novel way to constrain the models. The treatment of feedback from supernovae, and how this removes material from the interstellar medium, is also likely to have a lasting impact on the field. Claudia Lagos Ph.D. thesis was nominated by the Institute for Computational Cosmology at Durham University as an outstanding Ph.D. thesis 2012.

Astrophysics. --- Galaxies --- Formation. --- Formation, Galactic --- Formation of galaxies --- Galactic formation --- Galaxy formation --- Astronomical physics --- Physics. --- Cosmology. --- Astrophysics and Astroparticles. --- Astronomy --- Cosmic physics --- Physics --- Evolution --- Deism --- Metaphysics

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During the past decade, convincing evidence has been accumulated concerning the effect of active galactic nuclei (AGN) activity on the internal and external environment of their host galaxies. Featuring contributions from well-respected researchers in the field, and bringing together work by specialists in both galaxy formation and AGN, this volume addresses a number of key questions about AGN feedback in the context of galaxy formation. The topics covered include downsizing and star-formation time scales in massive elliptical galaxies, the connection between the epochs of supermassive black hole growth and galaxy formation and the question of whether AGN and star formation coexist. Authors also discuss key challenging computational problems, including jet-interstellar/intergalactic medium interactions, and both jet- and merging-induced star formation. Suitable for researchers and graduate students in astrophysics, this volume reflects the engaging and lively discussions taking place in this emerging field of research.

Galaxies --- Formation, Galactic --- Formation of galaxies --- Galactic formation --- Galaxy formation --- Formation. --- Evolution --- Galactic nuclei --- Nuclei, Galactic --- Extragalactic nebulae --- Nebulae, Extragalactic --- Astronomy --- Mathematical models --- Formation

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This thesis presents a pioneering method for gleaning the maximum information from the deepest images of the far-infrared universe obtained with the Herschel satellite, reaching galaxies fainter by an order of magnitude than in previous studies. Using these high-quality measurements, the author first demonstrates that the vast majority of galaxy star formation did not take place in merger-driven starbursts over 90% of the history of the universe, which suggests that galaxy growth is instead dominated by a steady infall of matter. The author further demonstrates that massive galaxies suffer a gradual decline in their star formation activity, providing an alternative path for galaxies to stop star formation. One of the key unsolved questions in astrophysics is how galaxies acquired their mass in the course of cosmic time. In the standard theory, the merging of galaxies plays a major role in forming new stars. Then, old galaxies abruptly stop forming stars through an unknown process. Investigating this theory requires an unbiased measure of the star formation intensity of galaxies, which has been unavailable due to the dust obscuration of stellar light.

Physics. --- Astrophysics. --- Astrophysics and Astroparticles. --- Numerical and Computational Physics, Simulation. --- Galaxies --- Formation. --- Formation, Galactic --- Formation of galaxies --- Galactic formation --- Galaxy formation --- Evolution --- Natural philosophy --- Philosophy, Natural --- Physical sciences --- Dynamics --- Astronomical physics --- Astronomy --- Cosmic physics --- Physics

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This book consists of invited reviews written by world-renowned experts on the subject of the outskirts of galaxies, an upcoming field which has been understudied so far. These regions are faint and hard to observe, yet hide a tremendous amount of information on the origin and early evolution of galaxies. They thus allow astronomers to address some of the most topical problems, such as gaseous and satellite accretion, radial migration, and merging. The book is published in conjunction with the celebration of the end of the four-year DAGAL project, an EU-funded initial training network, and with a major international conference on the topic held in March 2016 in Toledo. It thus reflects not only the views of the experts, but also the scientific discussions and progress achieved during the project and the meeting. The reviews in the book describe the most modern observations of the outer regions of our own Galaxy, and of galaxies in the local and high-redshift Universe. They tackle disks, haloes, streams, and accretion as observed through deep imaging and spectroscopy, and guide the reader through the various formation and evolution scenarios for galaxies. The reviews focus on the major open questions in the field, and explore how they can be tackled in the future. This book provides a unique entry point into the field for graduate students and non-specialists, and serves as a reference work for researchers in this exciting new field.

Galaxies --- Formation. --- Formation, Galactic --- Formation of galaxies --- Galactic formation --- Galaxy formation --- Astronomy, Observations and Techniques. --- Astrophysics and Astroparticles. --- Cosmology. --- Evolution --- Observations, Astronomical. --- Astronomy—Observations. --- Astrophysics. --- Astronomy --- Deism --- Metaphysics --- Astronomical physics --- Cosmic physics --- Physics --- Astronomical observations --- Observations, Astronomical

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Our Place in the Universe tells the story of our world, formation of the first galaxies and stars formed from great clouds containing the primordial elements made in the first few minutes; birth of stars, their lives and deaths in fiery supernova explosions; formation of the solar system, its planets and many moons; life on Earth, its needs and vicissitudes on land and in the seas; finally exoplanets, planets that surround distant stars. Interspersed in the text are short pieces on some of those who revealed these wonders to us. It is written in a very authoritative and readable form and conta

Cosmology. --- Galaxies --- Astrophysics. --- Astronomical physics --- Astronomy --- Cosmic physics --- Physics --- Galactic evolution --- Galaxy evolution --- Evolution --- Galaxy mergers --- Formation, Galactic --- Formation of galaxies --- Galactic formation --- Galaxy formation --- Deism --- Metaphysics --- Formation. --- Evolution. --- Formation --- Solar system --- Origin.