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相关论文: Evaluating and Improving Semi-analytic modelling o…

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We present redshift-zero synthetic observational data considering dust attenuation and dust emission for the thirty galaxies of the Auriga project, calculated with the SKIRT radiative transfer code. The post-processing procedure includes…

The observed UV continuum slope of star forming galaxies is strongly affected by the presence of dust. Its observation is then a potentially valuable diagnostic of dust attenuation, particularly at high-redshift where other diagnostics are…

宇宙学与河外天体物理 · 物理学 2015-06-12 Stephen M. Wilkins , Andrew Bunker , William Coulton , Rupert Croft , Tiziana Di Matteo , Nishikanta Khandai , Yu Feng

We relate the optical attenuation inferred by the Balmer decrement, $A_{V\mathrm{,BD}}$, and by the SED-fitting, $A_{V\mathrm{,SED}}$, to the dust distribution and gas surface density throughout the disc of galaxies, down to scales smaller…

星系天体物理 · 物理学 2025-10-29 E. D. Paspaliaris , S. Bianchi , E. Corbelli , A. Concas

We present FitSKIRT, a method to efficiently fit radiative transfer models to UV/optical images of dusty galaxies. These images have the advantage that they have better spatial resolution compared to FIR/submm data. FitSKIRT uses the GAlib…

宇宙学与河外天体物理 · 物理学 2015-06-12 Gert De Geyter , Maarten Baes , Jacopo Fritz , Peter Camps

One of the most common methods for inferring galaxy attenuation curves is via spectral energy distribution (SED) modeling, where the dust attenuation properties are modeled simultaneously with other galaxy physical properties. In this…

星系天体物理 · 物理学 2022-05-25 Sidney Lower , Desika Narayanan , Joel Leja , Benjamin D. Johnson , Charlie Conroy , Romeel Dave

We present predictions for the evolution of the galaxy luminosity function, number counts and redshift distributions in the IR based on the Lambda-CDM cosmological model. We use the combined GALFORM semi-analytical galaxy formation model…

天体物理学 · 物理学 2009-11-13 C. G. Lacey , C. M. Baugh , C. S. Frenk , L. Silva , G. L. Granato , A. Bressan

Semi-analytic models are a widely used approach to simulate galaxy properties within a cosmological framework, relying on simplified yet physically motivated prescriptions. They have also proven to be an efficient alternative for generating…

Semi-analytical models of galaxy formation based on hierarchical clustering now make a wide range of predictions for observable properties of galaxies at low and high redshift. This article concentrates on 2 aspects: (1) Self-consistent…

天体物理学 · 物理学 2007-05-23 Cedric Lacey , Carlton Baugh , Shaun Cole , Carlos Frenk , Fabio Governato

We study the ultraviolet to far-infrared (hereafter UV-to-IR) SEDs of a sample of intermediate redshift (0.2 < z < 0.7) UV-selected galaxies from the ELAIS-N1 and ELAIS-N2 fields by fitting a multi-wavelength dataset to a library of GRASIL…

Recent years have seen growing interest in post-processing cosmological simulations with radiative transfer codes to predict observable fluxes for simulated galaxies. However, this can be slow, and requires a number of assumptions in cases…

星系天体物理 · 物理学 2022-12-07 R. K. Cochrane , C. C. Hayward , D. Angles-Alcazar , R. S. Somerville

The luminosity functions at z < 4 - 5 suggest that most galaxies have a relatively low stellar mass (logM_star = 10) and a low dust attenuation (A_FUV = 1.0). The physical properties of these objects are quite homogeneous. We used an…

AIMS: I present the Monte Carlo radiative transfer code TRADING (Transfer of RAdiation through Dust In Galaxies). The code computes self-consistently the extinction of radiation in a dusty medium (including absorption and scattering) and…

天体物理学 · 物理学 2009-11-13 Simone Bianchi

We study dwarf galaxy formation at high redshift ($z\ge5$) using a suite of high- resolution, cosmological hydrodynamic simulations and a semi-analytic model (SAM). We focus on gas accretion, cooling and star formation in this work by…

宇宙学与河外天体物理 · 物理学 2018-08-07 Yuxiang Qin , Alan R. Duffy , Simon J. Mutch , Gregory B. Poole , Paul M. Geil , Andrei Mesinger , J. Stuart B. Wyithe

Optical nebular emission lines are commonly used to estimate the star formation rate of galaxies and the black hole accretion rate of their central active nucleus. The accuracy of the conversion from line strengths to physical properties…

We develop a method to estimate the dust attenuation curve of galaxies from full spectral fitting of their optical spectra. Motivated from previous studies, we separate the small-scale features from the large-scale spectral shape, by…

星系天体物理 · 物理学 2020-06-17 Niu Li , Cheng Li , Houjun Mo , Jian Hu , Shuang Zhou , Cheng Du

(Abridged) We aim to study the evolution of dust attenuation in galaxies selected in the IR in the redshift range in which they are known to dominate the star formation activity in the universe. The comparison with other measurements of…

星系天体物理 · 物理学 2015-05-20 V. Buat , N. Oi , S. Heinis , L. Ciesla , D. Burgarella , H. Matsuhara , K. Malek , T. Goto , M. Malkan , L. Marchetti , Y. Ohyama , C. Pearson , S. Serjeant

One of the most remarkable outcomes from \textit{JWST} has been the exquisite UV-optical spectroscopic data for galaxies in the high-redshift Universe ($z \geq 5$), enabling the use of various nebular emission lines to infer conditions of…

Aims: We introduce a new deep-learning approach for the reconstruction of 3D dust density and temperature distributions from multi-wavelength dust emission observations on the scale of individual star-forming cloud cores (<0.2pc). Methods:…

Aims. Our aim is to estimate the intergalactic medium transmission towards UV-selected star-forming galaxies at redshift 4 and above and study the effect of the dust attenuation on these measurements. Methods. The ultra-violet spectrum of…

Photometric data of galaxies covering the rest-frame wavelength range from far-UV to far-IR make it possible to derive galaxy properties with a high reliability by fitting the attenuated stellar emission and the related dust emission at the…

宇宙学与河外天体物理 · 物理学 2015-05-14 S. Noll , D. Burgarella , E. Giovannoli , V. Buat , D. Marcillac , J. C. Munoz-Mateos