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Next-generation photometric and spectroscopic surveys will detect faint galaxies in massive clusters, advancing our understanding of galaxy formation in dense environments. Comparing these observations with theoretical models requires…

Astrophysics of Galaxies · Physics 2025-05-19 Jonathan S. Gómez , Tomas Hough , Alejandro Jiménez Muñoz , Gustavo Yepes , Weiguang Cui , Sofía A. Cora

[abridged] We present results from the latest version of the GAEA theoretical model of galaxy formation coupled with merger trees extracted from the Planck Millennium Simulation (PMS). With respect to the Millennium Simulation, the PMS…

Astrophysics of Galaxies · Physics 2025-07-02 Fabio Fontanot , Gabriella De Lucia , Lizhi Xie , Michaela Hirschmann , Carlton Baugh , John C. Helly

This pedagogical review of galaxy cluster simulations is based on three lectures given at the 2008 Enrico Fermi Summer School entitled "Astrophysics of Galaxy Clusters". It covers the standard cosmological framework, growth of perturbations…

Cosmology and Nongalactic Astrophysics · Physics 2010-05-10 Michael L. Norman

Complex systems' modeling and simulation are powerful ways to investigate a multitude of natural phenomena providing extended knowledge on their structure and behavior. However, enhanced modeling and simulation require integration of…

We present an algebraic approach to evolutionary accumulation modelling (EvAM). EvAM is concerned with learning and predicting the order in which evolutionary features accumulate over time. Our approach is complementary to the more common…

Applications · Statistics 2026-04-29 Jessica Renz , Frederik Witt , Iain G. Johnston

We present a hierarchical galaxy formation model which can account for the number counts of sources detected through their emission at sub-millimetre wavelengths. The first stage in our approach is an ab initio calculation of the star…

Astrophysics · Physics 2007-05-23 C. M. Baugh , C. G. Lacey , C. S. Frenk , G. L. Granato , L. Silva , A. Bressan , A. J. Benson , S. Cole

Modifications of the equations of general relativity at large distances offer one possibility to explain the observed properties of our Universe without invoking a cosmological constant. Numerous proposals for such modified gravity…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-16 Fabio Fontanot , Ewald Puchwein , Volker Springel , Davide Bianchi

This series of papers is intended to present astrocladistics in some detail and evaluate this methodology in reconstructing phylogenies of galaxies. Being based on the evolution of all the characters describing galaxies, it is an objective…

Astrophysics · Physics 2007-05-23 Didier Fraix-Burnet , Philippe Choler , Emmanuel J. P. Douzery , Anne Verhamme

Various heuristic approaches to model unresolved supernova (SN) feedback in galaxy formation simulations exist to reproduce the formation of spiral galaxies and the overall inefficient conversion of gas into stars. Some models, however,…

Astrophysics of Galaxies · Physics 2017-03-08 Alejandro Núñez , Jeremiah P. Ostriker , Thorsten Naab , Ludwig Oser , Chia-Yu Hu , Ena Choi

We study semi-linear evolutionary problems where the linear part is the generator of a positive $C_0$-semigroup. The non-linear part is assumed to be quasi-increasing. Given an initial value in between a sub- and a super-solution of the…

Analysis of PDEs · Mathematics 2025-01-14 Wolfgang Arendt , Daniel Daners

In a hierarchical, dark matter-dominated Universe, stellar mass functions (SMFs), galaxy merger rates, star formation histories (SFHs), satellite abundances, and intracluster light, should all be intimately connected observables. However,…

The tight relationship between the stellar mass and halo mass of galaxies is one of the most fundamental scaling relations in galaxy formation and evolution. It has become a critical constraint for galaxy formation models. Over the past…

Astrophysics of Galaxies · Physics 2025-02-20 Kai Wang , Yingjie Peng

We study the shape and evolution of the star formation main sequence in three independently developed semi-analytic models of galaxy formation. We focus, in particular, on the characterization of the model galaxies that are significantly…

Astrophysics of Galaxies · Physics 2019-03-15 Lan Wang , Gabriella De Lucia , Fabio Fontanot , Michaela Hirschmann

We study the sources of biases and systematics in the derivation of galaxy properties of observational studies, focusing on stellar masses, star formation rates, gas/stellar metallicities, stellar ages and magnitudes/colors. We use…

Astrophysics of Galaxies · Physics 2015-10-16 Giovanni Guidi , Cecilia Scannapieco , C. Jakob Walcher

Recently, interpretable models called self-explaining models (SEMs) have been proposed with the goal of providing interpretability robustness. We evaluate the interpretability robustness of SEMs and show that explanations provided by SEMs…

Machine Learning · Computer Science 2020-07-03 Haizhong Zheng , Earlence Fernandes , Atul Prakash

Recent results are reviewed on galaxy dynamics, bar evolution, destruction and re-formation, cold gas accretion, gas radial flows and AGN fueling, minor mergers. Some problems of galaxy evolution are discussed in particular, exchange of…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-19 Francoise Combes

In this paper we present a critical discussion of the algorithms commonly used in N-body simulations of Galaxy Formation to deal with the energy equation governing heating and cooling, to model star formation and the star formation rate,…

Astrophysics · Physics 2009-10-31 Fulvio Buonomo , Giovanni Carraro , Cesare Chiosi , Cesario Lia

We present a flexible, detailed model for the evolution of galactic discs in a cosmological context since $z\approx 4$, including a physically-motivated model for radial transport of gas and stars within galactic discs. This expansion…

Astrophysics of Galaxies · Physics 2019-06-19 John C. Forbes , Mark R. Krumholz , Joshua S. Speagle

The ever-increasing size of modern data sets combined with the difficulty of obtaining label information has made semi-supervised learning one of the problems of significant practical importance in modern data analysis. We revisit the…

Machine Learning · Computer Science 2014-11-06 Diederik P. Kingma , Danilo J. Rezende , Shakir Mohamed , Max Welling

We present results from thirteen cosmological simulations that explore the parameter space of the "Evolution and Assembly of GaLaxies and their Environments" (EAGLE) simulation project. Four of the simulations follow the evolution of a…

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