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We examine the influence of dark matter halo assembly on the evolution of a simulated $\sim L^\star$ galaxy. Starting from a zoom-in simulation of a star-forming galaxy evolved with the EAGLE galaxy formation model, we use the genetic…

星系天体物理 · 物理学 2021-01-08 Jonathan J. Davies , Robert A. Crain , Andrew Pontzen

Context. There are typically two different approaches to inferring the mass formation history (MFH) of a given galaxy from its luminosity in different bands. Non-parametric methods are known for their flexibility and accuracy, while…

星系天体物理 · 物理学 2022-05-25 D. Jiménez-López , P. Corcho-Caballero , S. Zamora , Y. Ascasibar

We explore the cosmic evolution of the fraction of dust obscured star formation predicted by the \textsc{simba} cosmological hydrodynamic simulations featuring an on-the-fly model for dust formation, evolution, and destruction. We find that…

星系天体物理 · 物理学 2024-01-15 Dhruv T. Zimmerman , Desika Narayanan , Katherine E. Whitaker , Romeel Davè

We simulate the dynamical and chemical evolution of a dwarf galaxy embedded in a dark matter halo, using a three-dimensional N-body/SPH simulation code combined with stellar population synthesis. The initial condition is adopted in accord…

天体物理学 · 物理学 2016-08-30 Masao Mori , Yuzuru Yoshii , Takuji Tsujimoto , Ken'ichi Nomoto

The cold dark matter (CDM) model predicts galaxies have 100 times more dark matter mass than stars. Nevertheless, recent observations report the existence of dark-matter-deficient galaxies with less dark matter than expected. To solve this…

星系天体物理 · 物理学 2025-10-13 Koki Otaki , Masao Mori

We explore the connection between the UV luminosity functions (LFs) of high-$z$ galaxies and the distribution of stellar masses and star-formation histories (SFHs) in their host dark matter halos. We provide a baseline for a…

星系天体物理 · 物理学 2018-12-05 Sandro Tacchella , Sownak Bose , Charlie Conroy , Daniel J. Eisenstein , Benjamin D. Johnson

Some massive, quiescent galaxies at z>3 appear to contain considerable numbers of old stars (forming at z>7). Works inferring the star formation histories of at least one such galaxy observed with JWST have suggested that the assembly of so…

星系天体物理 · 物理学 2025-09-04 R. K. Cochrane

There are mainly two different approaches to measure the cosmic star formation history: direct star formation rate density (SFRD) and stellar mass density rhostar as functions of redshift. Compilations of current observations seem to show a…

宇宙学与河外天体物理 · 物理学 2012-01-13 Jun-Hwan Choi , Kentaro Nagamine

The color of galaxies is a fundamental property, easily measured, that constrains models of galaxies and their evolution. Dust attenuation and star formation history (SFH) are the dominant factors affecting the color of galaxies. Here we…

We present a new derivation of the star formation history (SFH) of the dSph galaxy Fornax in two central regions, characterised by unprecedented precision and age resolution. It reveals that star formation has proceeded in sharp bursts…

星系天体物理 · 物理学 2021-01-12 V. Rusakov , M. Monelli , C. Gallart , T. K. Fritz , T. Ruiz-Lara , E. J. Bernard , S. Cassisi

Cosmological hydrodynamic simulations robustly predict that high-redshift galaxy star formation histories (SFHs) are smoothly-rising and vary with mass only by a scale factor. We use our latest simulations to test whether this scenario can…

宇宙学与河外天体物理 · 物理学 2015-05-19 Kristian Finlator , Benjamin D. Oppenheimer , Romeel Davé

We present a large sample of fully self-consistent hydrodynamical Nbody/Tree-SPH simulations of isolated dwarf spheroidal galaxies (dSphs). It has enabled us to identify the key physical parameters and mechanisms at the origin of the…

星系天体物理 · 物理学 2015-05-13 Y. Revaz , P. Jablonka , T. Sawala , V. Hill , B. Letarte , M. Irwin , G. Battaglia , A. Helmi , M. D. Shetrone , E. Tolstoy , K. A. Venn

We present a new evolutionary model for the far-UV to sub-mm properties of the galaxy population. This combines a semi-analytic galaxy formation model based on hierarchical clustering (GALFORM) with a spectro-photometric code which includes…

天体物理学 · 物理学 2009-10-31 G. L. Granato , C. G. Lacey , L. Silva , A. Bressan , C. M. Baugh , S. Cole , C. S. Frenk

We adapt the L-Galaxies semi-analytic model to follow the star-formation histories (SFH) of galaxies -- by which we mean a record of the formation time and metallicities of the stars that are present in each galaxy at a given time. We use…

We present new fully self-consistent models of the formation and evolution of isolated dwarf galaxies. We have used the publicly available N-body/SPH code HYDRA, to which we have added a set of star formation criteria, and prescriptions for…

天体物理学 · 物理学 2009-11-13 Sander Valcke , S. De Rijcke , H. Dejonghe

In this paper we investigate the impact of different star formation histories (SFHs) on the relation between stellar mass M$_{*}$ and star formation rate (SFR) using a sample of galaxies with reliable spectroscopic redshift zspec>2 drawn…

We study the recent star formation histories of local galaxies by analyzing the scatter in their colours and spectral properties. We present evidence that the distribution of star formation histories changes qualitatively above a…

We study star formation histories (SFHs) of $\simeq500$ dwarf galaxies (stellar mass $M_\ast = 10^5 - 10^9\,M_\odot$) from FIRE-2 cosmological zoom-in simulations. We compare dwarfs around individual Milky Way (MW)-mass galaxies, dwarfs in…

We study the dust evolution in galaxies by implementing a detailed dust prescription in the SAGE semi-analytical model for galaxy formation. The new model, called Dusty SAGE, follows the condensation of dust in the ejecta of type II…

星系天体物理 · 物理学 2020-02-18 Dian P. Triani , Manodeep Sinha , Darren J. Croton , Camilla Pacifici , Eli Dwek

We use Halpha and FUV GALEX data for a large sample of nearby objects to study the high mass star formation activity of normal late-type galaxies. The data are corrected for dust attenuation using the most accurate techniques at present…

宇宙学与河外天体物理 · 物理学 2014-11-20 A. Boselli , S. Boissier , L. Cortese , V. Buat , T. M. Hughes , G. Gavazzi