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Related papers: Puffing up early-type galaxies by baryonic mass lo…

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Early-type galaxies exhibit thermal and molecular resonance emission from dust that is shed and heated through stellar mass loss as a subset of the population moves through the AGB phase of evolution. Because this emission can give direct…

Astrophysics · Physics 2009-11-07 Alex E. Athey , Joel N. Bregman , Jesse D. Bregman , Pasquale Temi , Marc Sauvage

I discuss the role played by short-duration eruptive mass loss in the evolution of very massive stars. Giant eruptions of Luminous Blue Variables (LBVs) like the 19th century event of eta Carinae can remove large quantities of mass almost…

Astrophysics · Physics 2007-05-23 Nathan Smith

In this paper we investigate the mass assembly history of ultramassive (Mstar > 10^11Msun) dense (Sigma = Mstar/(2*pi*Re^2) > 2500 Msun/pc^2) early-type galaxies (ETGs) over the last 9 Gyr. We have traced the evolution of the number density…

Astrophysics of Galaxies · Physics 2016-08-17 A. Gargiulo , P. Saracco , S. Tamburri , I. Lonoce , F. Ciocca

We present the evolution of galaxy sizes, from redshift 2 to 0, for actively star forming and passive galaxies in the cosmological hydrodynamical 1003 cMpc3 simulation of the EAGLE project. We find that the sizes increase with stellar mass…

Astrophysics of Galaxies · Physics 2016-12-21 M. Furlong , R. G. Bower , R. A. Crain , J. Schaye , T. Theuns , J. W. Trayford , Y. Qu , M. Schaller , M. Berthet , J. C. Helly

This paper presents a new framework for understanding the relationship between a galaxy and its circumgalactic medium (CGM). It focuses on how imbalances between heating and cooling cause either expansion or contraction of the CGM. It does…

Astrophysics of Galaxies · Physics 2024-06-13 G. M. Voit , V. Pandya , D. B. Fielding , G. L. Bryan , C. Carr , M. Donahue , B. D. Oppenheimer , R. S. Somerville

Stellar-population analyses of today's galaxies show "downsizing", where the stars in more massive galaxies tend to have formed earlier and over a shorter time span. We show that this phenomenon is not necessarily "anti-hierarchical" but…

Astrophysics · Physics 2009-11-11 Eyal Neistein , Frank C. van den Bosch , Avishai Dekel

Spectroscopic observations from the Large Binocular Telescope and the Very Large Telescope reveal kinematically narrow lines (~50 km/s) for a sample of 14 Extreme Emission Line Galaxies (EELGs) at redshifts 1.4 < z < 2.3. These measurements…

We investigate the suppression of the baryon density fluctuations compared to the dark matter in the linear regime. Previous calculations predict that the suppression occurs up to a characteristic mass scale of ~ 1,000,000 solar masses,…

Astrophysics · Physics 2008-11-26 Smadar Naoz , Rennan Barkana

The capability of reconstructing the past star formation history of dwarf elliptical galaxies out of the Local Volume relies on modelling bright stellar populations currently evolving through the red giant branch (RGB) and the asymptotic…

Astrophysics of Galaxies · Physics 2026-05-27 Paolo Ventura , Richard D'Souza , Flavia Dell'Agli , Eric Bell , Claudio Gavetti , Chiara Fiumi , Marco Tailo

Using results from the Herschel Astrophysical Terrahertz Large-Area Survey and the Galaxy and Mass Assembly project, we show that, for galaxy masses above approximately 1.0e8 solar masses, 51% of the stellar mass-density in the local…

We present a study on the clustering of a stellar mass selected sample of galaxies with stellar masses M*>10^10Msol at redshifts 0.4<z<2.0, taken from the Palomar Observatory Wide-field Infrared Survey. We examine the clustering properties…

Cosmology and Nongalactic Astrophysics · Physics 2016-11-25 Sebastien Foucaud , Christopher J. Conselice

We present predictions for galactic halo baryon fractions from cosmological hydrodynamic simulations with a well-constrained model for galactic outflows. Without outflows, halos contain roughly the cosmic fraction of baryons, slightly…

Cosmology and Nongalactic Astrophysics · Physics 2009-01-22 Romeel Davé

Theoretical $\Lambda$CDM cosmological models predict a much larger number of low mass dark matter haloes than has been observed in the Local Group of galaxies. One possible explanation is the increased difficulty of detecting these haloes…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-12 Luciana O. Ruiz , Diego Falceta-Gonçalves , Gustavo A. Lanfranchi , Anderson Caproni

In the local Universe, the efficiency for converting baryonic gas into stars is very low. In dark matter halos where galaxies form and evolve, the average efficiency varies with galaxy stellar mass and has a maximum of about twenty percent…

Astrophysics of Galaxies · Physics 2022-07-20 Ziwen Zhang , Huiyuan Wang , Wentao Luo , Jun Zhang , H. J. Mo , YiPeng Jing , Xiaohu Yang , Hao Li

(shortened) The first couple of stellar generations may have been massive, of order 100 Msun, and to have played a dominant role in galaxy formation and the chemical enrichment of the early Universe. Some fraction of these objects may have…

Solar and Stellar Astrophysics · Physics 2015-06-11 Lianne Muijres , Jorick S. Vink , A. de Koter , R. Hirschi , N. Langer , S. -C. Yoon

Dust formation in the winds of hot stars is inextricably linked to the classic eruptive state of luminous blue variables (LBVs) because it requires very high mass loss rates, Mdot>10^(-2.5) Msun/year, for grains to grow and for the non-dust…

Solar and Stellar Astrophysics · Physics 2015-05-30 C. S. Kochanek

Using observed stellar mass functions out to $z=5$, we measure the main progenitor stellar mass growth of descendant galaxies with masses of $\log{M_{*}/M_{\odot}}=11.5,11.0,10.5,10.0$ at $z\sim0.1$ using an evolving cumulative number…

Astrophysics of Galaxies · Physics 2017-11-08 Allison R. Hill , Adam Muzzin , Marijn Franx , Danilo Marchesini

Many of the early-type galaxies observed so far at z>1 turned out to have smaller radii with respect to that of a typical present-day early-type galaxy with comparable mass. This has generated the conviction that in the past early-type…

Cosmology and Nongalactic Astrophysics · Physics 2010-09-07 P. Saracco , M. Longhetti , A. Gargiulo

The spatial distributions of luminous and dark matter in massive early-type galaxies reflect the formation processes which shaped these systems. This article reviews the predictions of cosmological simulations for the dark and baryonic…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-12 Ortwin Gerhard