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(abridged) The majority of star-forming galaxies follow a simple empirical correlation in the star formation rate (SFR) versus stellar mass ($M_*$) plane, usually referred to as the star formation Main Sequence (MS). Here we combine a set…

We present results of including heating and cooling in cosmological simulations of the $\Lambda$CDM cosmology and demonstrate their effects on scaling laws of galaxy clusters. The scaling relations when radiative cooling is included are in…

Astrophysics · Physics 2007-05-23 Orrarujee Muanwong

The coming generation of galaxy surveys will provide measurements of galaxy clustering with unprecedented accuracy and data size, which will allow us to test cosmological models at much higher precision than achievable previously. This…

Cosmology and Nongalactic Astrophysics · Physics 2022-05-17 Cheng-Zong Ruan , Carolina Cuesta-Lazaro , Alexander Eggemeier , César Hernández-Aguayo , Carlton M. Baugh , Baojiu Li , Francisco Prada

We exploit observations at 1.25 mm with the ESO-SEST telescope of a southern galaxy sample, selected from the IRAS PSC and complete to $S_{60}=2 Jy$, to derive the FIR and mm luminosity functions and the conditional probability…

Astrophysics · Physics 2009-10-30 A. Franceschini , P. Andreani , L. Danese

We present an update to the multiphase SPH galaxy formation code by Scannapieco et al. We include a more elaborate treatment of the production of metals, cooling rates based on individual element abundances, and a scheme for the turbulent…

Astrophysics of Galaxies · Physics 2013-07-17 Michael Aumer , Simon White , Thorsten Naab , Cecilia Scannapieco

Cosmological hydrodynamic simulations can accurately predict the properties of the intergalactic medium (IGM), but only under the condition of retaining high spatial resolution necessary to resolve density fluctuations in the IGM. This…

Cosmology and Nongalactic Astrophysics · Physics 2016-08-17 Daniele Sorini , José Oñorbe , Zarija Lukić , Joseph F. Hennawi

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…

A new Monte-Carlo radiative-transfer code, Sunrise, is used to study the effects of dust in N-body/hydrodynamic simulations of interacting galaxies. Dust has a profound effect on the appearance of the simulated galaxies. At peak…

Astrophysics · Physics 2009-08-05 Patrik Jonsson , T. J. Cox , Joel R. Primack

In this paper we present a simple analysis around scaling relations derived from the Schmidt conjecture for star-forming molecular clouds, at the intra-cloud scale. Using a hierarchical tree (dendrograms) above a constant threshold ($A_V$ =…

We use two cosmological simulations to study the impact of spurious heating of stellar motions within simulated galaxies by dark matter (DM) particles. The simulations share the same numerical and subgrid parameters, but one used a factor…

Astrophysics of Galaxies · Physics 2023-09-06 Aaron D. Ludlow , S. Michael Fall , Matthew J. Wilkinson , Joop Schaye , Danail Obreschkow

Small-scale discrepancies in the standard Lambda cold dark matter paradigm have motivated the exploration of alternative dark matter (DM) models, such as warm dark matter (WDM). We investigate the constraining power of galaxy scaling…

The failure of purely gravitational models of X-ray cluster formation to reproduce basic observed properties of the local cluster population suggests the need for one or more additional physical processes operating on the intracluster…

Astrophysics · Physics 2009-10-31 John J. Bialek , August E. Evrard , Joseph J. Mohr

The growth of structure from scale-free initial conditions is one of the most important tests of cosmological simulation methods, providing a realistically complex problem in which numerical results can be compared to rigorous analytic…

Astrophysics · Physics 2007-05-23 J. Michael Owen , David H. Weinberg , Jens V. Villumsen

We present an algorithm to self-consistently generate mock weak gravitational lensing convergence fields and galaxy distributions in redshift space. We generate three-dimensional cosmic density fields that follow a log-normal distribution,…

Cosmology and Nongalactic Astrophysics · Physics 2021-04-14 Ryu Makiya , Issha Kayo , Eiichiro Komatsu

Context: Several observations of the local Universe (LU) point towards the existence of very prominent structures. The presence of massive galaxy clusters and local super clusters on the one hand, but also large local voids and…

Based on the DECaLS shear catalog, we study the scaling relations between halo mass($M_{\rm h}$) and various proxies for SDSS central galaxies, including stellar mass($M_*$), stellar velocity dispersion($\sigma_*$), abundance matching halo…

Astrophysics of Galaxies · Physics 2023-11-06 Ziwen Zhang , Huiyuan Wang , Wentao Luo , Houjun Mo , Jun Zhang , Xiaohu Yang , Hao Li , Qinxun Li

While cosmic rays $(E\gtrsim 1\,\mathrm{GeV})$ are well coupled to a galaxy's interstellar medium (ISM) at scales of $L>100\,\mathrm{pc}$, adjusting stratification and driving outflows, their impact on small scales is less clear. Based on…

High Energy Astrophysical Phenomena · Physics 2024-10-03 Roark Habegger , Ka Wai Ho , Ka Ho Yuen , Ellen G. Zweibel

The connection between galaxies and their dark matter haloes is often described with the Stellar-to-Halo Mass relation (SHMR). Satellite galaxies in clusters have been shown to follow a SHMR distinct from central galaxies because of the…

Cosmology and Nongalactic Astrophysics · Physics 2022-03-30 Anna Niemiec , Carlo Giocoli , Ethan Cohen , Mathilde Jauzac , Eric Jullo , Marceau Limousin

We present a study on the inference of cosmological and astrophysical parameters using stacked galaxy cluster profiles. Utilizing the CAMELS-zoomGZ simulations, we explore how various cluster properties--such as X-ray surface brightness,…

Dust temperature is an important property of the interstellar medium (ISM) of galaxies. It is required when converting (sub)millimeter broadband flux to total infrared luminosity (L_IR), and hence star formation rate, in high-z galaxies.…

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