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The role of major mergers in galaxy evolution remains a key open question. Existing empirical merger identification methods use non-parametric and subjective visual classifications which can pose systematic challenges to constraining merger…

A new cosmic shear analysis pipeline SUNGLASS (Simulated UNiverses for Gravitational Lensing Analysis and Shear Surveys) is introduced. SUNGLASS is a pipeline that rapidly generates simulated universes for weak lensing and cosmic shear…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-20 A. Kiessling , A. F. Heavens , A. N. Taylor

We introduce a novel approach to modelling the nebular emission from star-forming galaxies by combining the contributions from many HII regions incorporating loose trends in physical properties, random dust attenuation, a predefined Halpha…

Recent spatially-resolved observations of massive early-type galaxies (ETGs) have uncovered evidence for radial gradients of the stellar initial mass function (IMF), ranging from super-Salpeter IMFs in the centre to Milky Way-like beyond…

Astrophysics of Galaxies · Physics 2018-11-06 Christopher Barber , Joop Schaye , Robert A. Crain

We present a new approach to study galaxy evolution in a cosmological context. We combine cosmological merger trees and semi-analytic models of galaxy formation to provide the initial conditions for multi-merger hydrodynamic simulations. In…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-11 Benjamin P. Moster , Andrea V. Macciò , Rachel S. Somerville

The JWST and ALMA have detected emission lines from the ionized interstellar medium (ISM) in some of the first galaxies at $z \gtrsim 6$. These measurements present an opportunity to better understand galaxy assembly histories and may allow…

Context. Measuring how the physical properties of galaxies change across cosmic times is essential to understand galaxy formation and evolution. With the advent of numerous ground-based and space-borne instruments launched over the past few…

Astrophysics of Galaxies · Physics 2019-02-13 M. Boquien , D. Burgarella , Y. Roehlly , V. Buat , L. Ciesla , D. Corre , A. K. Inoue , H. Salas

The galaxy luminosity function and galaxy stellar mass function are fundamental statistics in the testing of galaxy formation models. Theoretical predictions based on cosmological simulations can deviate from observations, especially at the…

Cosmology and Nongalactic Astrophysics · Physics 2021-10-18 Lin Tang , Weipeng Lin , Yang Wang , N. R. Napolitano

Numerical hydrodynamical simulations are used to predict the expected absorption properties of the Lyman-Alpha forest for a variety of Cold Dark Matter dominated cosmological scenarios: CHDM, OCDM, LCDM, SCDM, and tCDM. Synthetic spectra…

Astrophysics · Physics 2009-11-06 A. Meiksin , G. Bryan , M. Machacek

Residuals between measured galactic radii and those predicted by the Fundamental Plane (FP) are possible tracers of weak lensing magnification. However, observations have shown these to be systematically correlated with the large-scale…

Cosmology and Nongalactic Astrophysics · Physics 2023-01-25 Harry Johnston , Dana Sophia Westbeek , Sjoerd Weide , Nora Elisa Chisari , Yohan Dubois , Julien Devriendt , Christophe Pichon

To fully take advantage of the data provided by large-scale structure surveys, we need to quantify the potential impact of baryonic effects, such as feedback from active galactic nuclei (AGN) and star formation, on cosmological observables.…

We present a method to recover the gas-phase metallicity gradients from integral field spectroscopic (IFS) observations of barely resolved galaxies. We take a forward modelling approach and compare our models to the observed spatial…

Submillimeter (submm) integral field units (IFUs) utilising kinetic inductance detectors (KIDs) are a promising instrument architecture for the study of galaxies, galaxy clusters, and the large-scale structure of the Universe. In order to…

Instrumentation and Methods for Astrophysics · Physics 2026-04-28 A. Moerman , N. Soshnin , S. A. Brackenhoff , S. O. Dabironezare , K. Karatsu , L. H. Marting , S. A. H. de Rooij , M. Roos , B. R. Brandl , A. Endo

We present a hydrodynamical code based on the Smooth Particle Hydrodynamics technique implemented in an AP3M code aimed at solving the hydrodynamical and gravitational equations in a cosmological frame. We analyze the ability of the code to…

Astrophysics · Physics 2019-08-17 P. B. Tissera , D. G. Lambas , M. G. Abadi

We present our methods for generating a catalog of 7,000 synthetic images and 40,000 integrated spectra of redshift z = 0 galaxies from the Illustris Simulation. The mock data products are produced by using stellar population synthesis…

The intrinsic alignment of galaxy shapes (by means of their angular momentum) and their cross-correlation with the surrounding dark matter tidal field are investigated using the 160 000, z=1.2 synthetic galaxies extracted from the…

The spatial and temporal relationships between stellar age, kinematics, and chemistry are a fundamental tool for uncovering the physics driving galaxy formation and evolution. Observationally, these trends are derived using carefully…

Astrophysics of Galaxies · Physics 2022-10-26 M. S. Miranda , B. A. Macfarlane , B. K. Gibson

The Atacama Large Millimeter/Submillimeter Array (ALMA) in the sub-millimeter and the James Webb Space Telescope (JWST) in the infrared have achieved robust spectroscopic detections of emission lines from the interstellar medium (ISM) in…

Astrophysics of Galaxies · Physics 2023-08-08 Shengqi Yang , Adam Lidz , Aaron Smith , Andrew Benson , Hui Li

We use the TNG50 galaxy formation simulation to generate mock JWST NIRCam and NIRSpec microshutter array (MSA) observations of H$\alpha$-emitting gas in $M_*=10^8-10^{11.5}\,M_\odot$ star-forming galaxies at $z=2-6$. We measure…

Astrophysics of Galaxies · Physics 2026-01-28 Ravishankar Anirudh , Anna de Graaff , Florian Lacroix , Sedona H. Price , Annalisa Pillepich

We present the observational results of a survey for strong gravitational lens systems consisting of extended emission-line galaxies lensed by intervening early-type galaxies, conducted using integral field units (IFUs) of the Magellan…

Astrophysics · Physics 2008-11-26 Adam S. Bolton , Scott Burles