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Related papers: Cosmic-web quenching with DESI DR1: T-Web environm…

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We investigate the influence of large-scale cosmic web environments on galaxy quenching using a volume-limited, stellar mass-matched galaxy sample from SDSS DR18. Galaxies are classified as residing in sheets, filaments, or clusters based…

Astrophysics of Galaxies · Physics 2026-03-31 Anindita Nandi , Biswajit Pandey

We present the first public cosmic-web environment catalog built on any DESI data release. Using ASTRA (Algorithm for Stochastic Topological RAnking), we classify each object in the DESI Early Data Release into void, sheet, filament, or…

Cosmology and Nongalactic Astrophysics · Physics 2026-04-03 Diana C. Zapata-Zuluaga , Sofía Guevara-Montoya , Valeria Torres-Gomez , Juliana Hernandez , Jaime E. Forero-Romero

We investigate how cosmic web structures affect galaxy quenching in the IllustrisTNG (TNG100) cosmological simulations by reconstructing the cosmic web within each snapshot using the DisPerSE framework. We measure the comoving distance from…

We analyze a set of volume limited samples from the SDSS to study the dependence of galaxy colour on different environments of the cosmic web. We measure the local dimension of galaxies to determine the geometry of their embedding…

Astrophysics of Galaxies · Physics 2020-09-30 Biswajit Pandey , Suman Sarkar

We analyze the evolution of red and blue galaxies in different cosmic web environments from redshift $z=3$ to $z=0$ using the IllustrisTNG simulation. We use Otsu's method to classify the red or blue galaxies at each redshift and determine…

Astrophysics of Galaxies · Physics 2025-09-24 Biswajit Pandey , Anindita Nandi

We employ the hydrodynamical simulation IllustrisTNG-300-1 to explore the halo occupation distribution (HOD) and environmental dependence of luminous star-forming emission-line galaxies (ELGs) at $z \sim 1$. Such galaxies are key targets…

Astrophysics of Galaxies · Physics 2021-02-10 Boryana Hadzhiyska , Sandro Tacchella , Sownak Bose , Daniel J. Eisenstein

The evolution of galaxies is known to be connected to their position within the large-scale structure and their local environmental density. We investigate the relative importance of these using the underlying dark matter density field…

Astrophysics of Galaxies · Physics 2026-02-11 Catherine Gallagher , Tariq Yasin , Richard Stiskalek , Harry Desmond , Matt J. Jarvis

Galaxies evolve within the intricate geometry of the cosmic web, yet the distinct roles of its primary components - nodes and filaments remain incompletely understood. Using the EAGLE cosmological hydrodynamical simulation, we investigate…

Astrophysics of Galaxies · Physics 2026-02-25 Suman Sarkar , Biswajit Pandey , Apashanka Das

We analyze the SDSS data to classify the galaxies based on their colour using a fuzzy set-theoretic method and quantify their environments using the local dimension. We find that the fraction of the green galaxies does not depend on the…

Astrophysics of Galaxies · Physics 2021-07-01 Apashanka Das , Biswajit Pandey , Suman Sarkar

A dynamical classification of the cosmic web is proposed. The large scale environment is classified into four web types: voids, sheets, filaments and knots. The classification is based on the evaluation of the deformation tensor, i.e. the…

Astrophysics · Physics 2010-11-02 J. E. Forero-Romero , Y. Hoffman , S. Gottloeber , A. Klypin , G. Yepes

We investigate the dependence of the galaxy properties on cosmic web environments using the most up-to-date hydrodynamic simulation: Evolution and Assembly of Galaxies and their Environments (EAGLE). The baryon fractions in haloes and the…

Astrophysics of Galaxies · Physics 2020-09-25 Wenxiao Xu , Qi Guo , Haonan Zheng , Liang Gao , Cedric Lacey , Qing Gu , Shihong Liao , Shi Shao , Tianxiang Mao , Tianchi Zhang , Xuelei Chen

We measure the projected two-point correlation functions of emission-line galaxies (ELGs) from the Dark Energy Spectroscopic Instrument (DESI) One-Percent Survey and model their dependence on stellar mass and [OII] luminosity. We select…

Future near-infrared spectroscopic galaxy surveys will target high-redshift emission-line galaxies (ELGs) to test cosmological models. Deriving optimal constraints from emission-line galaxy clustering hinges on a robust understanding of…

Cosmology and Nongalactic Astrophysics · Physics 2026-01-28 Ivan Rapoport , Vincent Desjacques , Ehud Behar , Ravi K. Sheth

The role of the cosmic web in shaping galaxy properties is investigated in the GAMA spectroscopic survey in the redshift range $0.03 \leq z \leq 0.25$. The stellar mass, $u - r$ dust corrected colour and specific star formation rate (sSFR)…

Current and future cosmological surveys are targeting star-forming galaxies at $z\sim 1$ with nebular emission lines. We use a state-of-the-art semi-analytical model of galaxy formation and evolution to explore the large scale environment…

Astrophysics of Galaxies · Physics 2020-10-07 V. Gonzalez-Perez , W. Cui , S. Contreras , C. M. Baugh , J. Comparat , A. J. Griffin , J. Helly , A. Knebe , C. Lacey , P. Norberg

Large-scale structures (LSS) out to z $< 3.0$ are measured in the Cosmic Evolution Survey (COSMOS) using extremely accurate photometric redshifts (photoz). The Ks-band selected sample (from Ultra-Vista) is comprised of 155,954 galaxies. Two…

Galaxies exhibit different clustering and quenching properties in clusters, filaments, and the field, but it is still uncertain whether such differences are imprints of the tidal environment on galaxy formation, or if they reflect the…

Cosmology and Nongalactic Astrophysics · Physics 2018-12-26 Shadab Alam , Ying Zu , John A. Peacock , Rachel Mandelbaum

We study the enviromental dependence and the morphological composition of the galaxy color-magnitude diagram at z~0.7, using a pilot sub-sample of ~2000 galaxies from the COSMOS surve, with I_AB<24, photometric redshift within 0.61<z<0.85…

An analysis of more than 3000 galaxies resolved at better than 114 pc/h at z=0.62 in a LAOZI cosmological adaptive mesh refinement hydrodynamic simulation is performed and insights gained on star formation quenching and color migration. The…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-18 Renyue Cen
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