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A simple chemical enrichment code is described where the two basic mechanisms driving the evolution of the ages and metallicities of the stellar populations are the star formation efficiency and the fraction of gas ejected from the galaxy.…

Astrophysics · Physics 2009-11-06 I. Ferreras , J. Silk

The evolution of the galaxy stellar mass function is especially useful to test the current model of galaxy formation. Observational data have revealed a few inconsistencies with predictions from the $\Lambda {\rm CDM}$ model. For example,…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-18 Xi Kang , WeiPeng Lin , Ramin A. Skibba , Dongni Chen

The evolution of our Universe is strongly influenced by the attractive force of gravity. A key aspect of this evolution, therefore, is the merging of galaxies. Here, we explore the role of mergers in shaping the properties of massive…

Astrophysics of Galaxies · Physics 2025-06-12 Sugata Kaviraj

The mass assembly of galaxies can proceed through different physical processes. Here we report on the spectroscopic identification of close physical pairs of galaxies at redshifts 2 <z < 4 and discuss the impact of major mergers in shaping…

We present new measures of the evolving scaling relations between stellar mass, luminosity and rotational velocity for a morphologically-inclusive sample of 129 disk-like galaxies with z_AB<22.5 in the redshift range 0.2<z<1.3, based on…

Cosmology and Nongalactic Astrophysics · Physics 2011-10-27 Sarah H. Miller , Kevin Bundy , Mark Sullivan , Richard S. Ellis , Tommaso Treu

We present a model for merger-driven evolution of the mass function for massive galaxies and their central supermassive black holes at late times. We discuss the current observational evidence in favor of merger-driven massive galaxy…

Cosmology and Nongalactic Astrophysics · Physics 2017-02-22 Sean T. McWilliams , Jeremiah P. Ostriker , Frans Pretorius

Observations of high redshift galaxies have revealed a multitude of large clumpy rapidly star-forming galaxies. Their formation scenario and their link to present day spirals is still unknown. In this Letter we perform adaptive mesh…

Astrophysics of Galaxies · Physics 2015-05-13 Oscar Agertz , Romain Teyssier , Ben Moore

We introduce a toy model that describes (in a single equation) the mass in stars as a function of halo mass and redshift. Our model includes the suppression of gas accretion from gravitational shock heating and AGN jets mainly for M_halo >…

Cosmology and Nongalactic Astrophysics · Physics 2012-02-21 A. Cattaneo , G. A. Mamon , K. Warnick , A. Knebe

Evolution in the merger rate as a function of redshift is in principle the key observable testing hierarchical models for the formation and evolution of galaxies. However, in practice, direct measurement of this quantity has proven…

Astrophysics · Physics 2007-05-23 R. G. Abraham

In this review we discuss the evidence for galaxy interactions and mergers in the distant universe and the role of mergers in forming galaxies. Observations show that the fraction of massive (M> M_*) galaxies involved in major mergers is…

Astrophysics · Physics 2009-11-11 Christopher J. Conselice

We investigate the role that dry mergers play in the build-up of massive galaxies within the cold dark matter paradigm. Implementing an empirical shut-off mass scale for star formation, we find a nearly constant dry merger rate of $ \sim 6…

Astrophysics · Physics 2015-05-13 S. Khochfar , J. Silk

Investigating the assembly history of the most massive and passive galaxies will enhance our understanding of why galaxies exhibit such a remarkable diversity in structure and morphology. In this paper, we simultaneously investigate the…

Astrophysics of Galaxies · Physics 2025-01-22 D. Stoppacher , A. D. Montero-Dorta , M. C. Artale , A. Knebe , N. Padilla , A. J. Benson , C. Behrens

In this paper we review the present status and implications of H-alpha surveys at various redshifts. With the advent of sensitive wide-format near-infrared detectors on large telescopes, deep and extensive H-alpha surveys are now feasible…

Astrophysics · Physics 2017-01-25 Paul P. van der Werf , Alan F. M. Moorwood , Lin Yan

We studied the evolution of the gas kinematics of galaxies by performing hydrodynamical simulations in a cosmological scenario. We paid special attention to the origin of the scatter of the Tully-Fisher relation and the features which could…

Cosmology and Nongalactic Astrophysics · Physics 2013-06-12 Maria E. De Rossi , Susana E. Pedrosa

We compile a number of observations to estimate the time-averaged rate of formation or buildup of red sequence galaxies, as a function of mass and redshift. Comparing this with the mass functions of mergers and quasar hosts, and…

Astrophysics · Physics 2011-02-11 Philip F. Hopkins , Kevin Bundy , Lars Hernquist , Richard S. Ellis

We investigate the total major (> 1:4 by stellar mass) and minor (> 1:100 by stellar mass) merger history of a population of 80 massive (M_* > 10^11 M_sol) galaxies at high redshifts (z = 1.7 - 3). We utilize extremely deep and high…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-03 Asa F. L. Bluck , Christopher J. Conselice , Fernando Buitrago , Ruth Gruetzbauch , Carlos Hoyos , Alice Mortlock , Amanda E. Bauer

In order to determine what processes govern the assembly history of galaxies with rotating disks, we examine the stellar mass Tully-Fisher relation over a wide range in redshift partitioned according to whether or not galaxies contain a…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-12 Sarah H. Miller , Mark Sullivan , Richard S. Ellis

This paper presents direct evidence for hierarchical galaxy assembly out to redshifts z ~ 3. We identify major mergers using the model-independent CAS (concentration, asymmetry, clumpiness) physical morphological system on galaxies…

We present a simple set of kinematic criteria that can distinguish between galaxies dominated by ordered rotational motion and those involved in major merger events. Our criteria are based on the dynamics of the warm ionized gas (as traced…

A precise derivation of the evolution of the Tully Fisher is crucial to understand the interplay between dark matter and baryonic matter in cosmological models, Using 15 deployable integral field units of FLAMES/GIRAFFE at VLT, we have…

Astrophysics · Physics 2009-11-11 H. Flores , F. Hammer , M. Puech , P. Amram , C. Balkowski