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The mechanisms that bring galaxies to strongly reduce their star formation activity (star-formation quenching) is still poorly understood. To better study galaxy evolution, we propose a classification based on the maps of the ionised…

Substantial numbers of morphologically regular early-type (elliptical and lenticular) galaxies contain molecular gas, and the quantities of gas are probably sufficient to explain recent estimates of the current level of star formation…

Astrophysics · Physics 2009-11-13 Lisa Young , Martin Bureau , Alison Crocker , Francoise Combes

The increasing abundance of passive "red-sequence" galaxies since z=1-2 is mirrored by a coincident rise in the number of galaxies with spheroidal morphologies. In this paper, however, we show that in detail the correspondence between…

The goal of the Local Cluster Survey is to look for evidence of environmentally driven quenching among star-forming galaxies in nearby galaxy groups and clusters. Quenching is linked with environment and stellar mass, and much of the…

We use a semianalytic model of galaxy formation to compare the predictions of two quenching scenarios: halo quenching and black-hole (BH) quenching. After calibrating both models so that they fit the mass function of galaxies, BH quenching…

Astrophysics of Galaxies · Physics 2022-09-27 Ioanna Koutsouridou , Andrea Cattaneo

To investigate the mass dependence of structural transformation and star formation quenching, we construct three galaxy samples using massive ($M_* > 10^{10} M_{\odot}$) red, green, and blue galaxy populations at $0.5<z<2.5$ in five…

Astrophysics of Galaxies · Physics 2019-11-06 Yizhou Gu , Guanwen Fang , Qirong Yuan , Shiying Lu , Feng Li , Zhenyi Cai , Xu Kong , Tao Wang

Galaxy mergers are believed to play a key role in transforming star-forming disk galaxies into quenched ellipticals. Most of our theoretical knowledge about such morphological transformations does, however, rely on idealised simulations…

Astrophysics of Galaxies · Physics 2017-07-20 Martin Sparre , Volker Springel

We study the quenching of star formation as a function of redshift, environment and stellar mass in the galaxy formation simulations of Henriques et al. (2015), which implement an updated version of the Munich semi-analytic model…

Astrophysics of Galaxies · Physics 2017-06-21 Bruno M. B. Henriques , Simon D. M. White , Peter A. Thomas , Raul E. Angulo , Qi Guo , Gerard Lemson , Wenting Wang

Galaxy-wide star formation can be quenched by a number of physical processes such as environmental effects (e.g., ram pressure stripping) and supernova feedback. Using numerical simulations, we here demonstrate that star formation can be…

Astrophysics of Galaxies · Physics 2017-08-31 Omima Osman , Kenji Bekki

This work presents an in-depth analysis of four gravitationally lensed red galaxies at z = 1.6-3.2. The sources are magnified by factors of 2.7-30 by foreground clusters, enabling spectral and morphological measurements that are otherwise…

We investigate the relationship between the quenching of star formation and the structural transformation of massive galaxies, using a large sample of photometrically-selected post-starburst galaxies in the UKIDSS UDS field. We find that…

We study quenching in seven green valley galaxies on kpc scales by resolving their molecular gas content using \textsuperscript{12}CO(1-0) observations obtained with NOEMA and ALMA, and their star-formation rate using spatially resolved…

Astrophysics of Galaxies · Physics 2020-07-29 Simcha Brownson , Francesco Belfiore , Roberto Maiolino , Lihwai Lin , Stefano Carniani

Central galaxies make up the majority of the galaxy population, including the majority of the quiescent population at $\mathcal{M}_* > 10^{10}\mathrm{M}_\odot$. Thus, the mechanism(s) responsible for quenching central galaxies plays a…

Astrophysics of Galaxies · Physics 2017-05-24 ChangHoon Hahn , Jeremy L. Tinker , Andrew R. Wetzel

Detecting galaxies when their star-formation is being quenched is crucial to understand the mechanisms driving their evolution. We identify for the first time a sample of quenching galaxies selected just after the interruption of their star…

Astrophysics of Galaxies · Physics 2018-05-16 Salvatore Quai , Lucia Pozzetti , Annalisa Citro , Michele Moresco , Andrea Cimatti

Using cosmological simulations, we address the properties of high-redshift star-forming galaxies (SFGs) across their main sequence (MS) in the plane of star-formation rate (SFR) versus stellar mass. We relate them to the evolution of…

It has long been known that environment has a large effect on star formation in galaxies. There are several known plausible mechanisms to remove the cool gas needed for star formation, such as strangulation, harassment and ram-pressure…

Astrophysics of Galaxies · Physics 2017-11-08 P. W. Hatfield , M. J. Jarvis

Using a sample of 4 galaxy clusters at $1.35 < z < 1.65$ and 10 galaxy clusters at $0.85 < z < 1.35$, we measure the environmental quenching timescale, $t_Q$, corresponding to the time required after a galaxy is accreted by a cluster for it…

We investigate how the ageing of stellar populations can drive a morphological transformation in galaxies whose star formation (SF) activity has been quenched on short timescales, like in cluster galaxies subject to ram pressure stripping…

Astrophysics of Galaxies · Physics 2023-08-30 A. Marasco , B. M. Poggianti , J. Fritz , A. Werle , B. Vulcani , A. Moretti , M. Gullieuszik , A. Kulier

In the local Universe, there is a strong division in the star-forming properties of low-mass galaxies, with star formation largely ubiquitous amongst the field population while satellite systems are predominantly quenched. This dichotomy…

The massive galaxies in the young universe, ten billion years ago, formed stars at surprising intensities. Although this is commonly attributed to violent mergers, the properties of many of these galaxies are incompatible with such events,…

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