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We investigate how the star formation activity of galaxies depends on their position within the cosmic web using the SIMBA cosmological simulation from redshift $z=3$ to $z=0$. While previous studies found that galaxies closer to filaments…

Cosmology and Nongalactic Astrophysics · Physics 2026-02-17 B. Jego , K. Kraljic , M. Béthermin , R. Davé

Galaxy properties are known to be affected by their environment. This is well established for the extremes of the density scales, between the high-density cluster environment and the low-density field. It is however not fully understood how…

Astrophysics of Galaxies · Physics 2024-09-20 Callum J. O'Kane , Ulrike Kuchner , Meghan E. Gray , Alfonso Aragón-Salamanca

We use a mass complete (log($M/M_{\odot}$) $\geqslant$ 9.6) sample of galaxies with accurate photometric redshifts in the COSMOS field to construct the density field and the cosmic web to $z$=1.2. The comic web extraction relies on the…

With the aim of bringing substantial insight to the fundamental question of how galaxies acquire their material for star-formation, we present the first comprehensive characterisation of the galaxy connectivity (i.e. the number of…

Astrophysics of Galaxies · Physics 2023-05-03 Daniela Galárraga-Espinosa , Enrico Garaldi , Guinevere Kauffmann

We look for correlated changes in stellar mass and star formation rate along filaments in the cosmic web by examining the stellar masses and UV-derived star formation rates (SFR) of 1,799 ungrouped and unpaired spiral galaxies that reside…

We study the physical properties of a spectroscopic sample of 28 star-forming galaxies in a large filamentary structure in the COSMOS field at $z\sim$0.53, with spectroscopic data taken with the Keck/DEIMOS spectrograph, and compare them…

Astrophysics of Galaxies · Physics 2015-10-20 Behnam Darvish , Bahram Mobasher , David Sobral , Shoubaneh Hemmati , Hooshang Nayyeri , Irene Shivaei

Galaxies form and evolve within the diverse environments of the cosmic web. However, disentangling the effects of internal properties, local environments, and large-scale structures (LSS) on galaxy evolution involvessignificant…

Astrophysics of Galaxies · Physics 2025-04-04 Stefano Zarattini , J. Alfonso L. Aguerri

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)…

Galaxy environment plays an important role in driving the transformation of galaxies from blue and star-forming to red and quenched. Recent works have focused on the role of cosmic web filaments in galaxy evolution and have suggested that…

(Abridged) This paper presents an environment and stellar mass study of a large sample of star-forming (SF) galaxies at z=0.84 from the HiZELS survey, over 1.3 deg^2 in the COSMOS and UKIDSS UDS fields. By taking advantage of a truly…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-19 David Sobral , Philip Best , Ian Smail , James Geach , Michele Cirasuolo , Timothy Garn , Gavin B. Dalton

To study the role of environment in galaxy evolution, we reconstruct the underlying density field of galaxies based on COSMOS2020 (The Farmer catalog) and provide the density catalog for a magnitude limited ($K_{s}<24.5$) sample of $\sim…

Combining the catalogue of galaxy morphologies in the COSMOS field and the sample of H$\alpha$ emitters at redshifts $z=0.4$ and $z=0.84$ of the HiZELS survey, we selected $\sim$ 220 star-forming bulgeless systems (S\'ersic index $n \leq…

Astrophysics of Galaxies · Physics 2018-01-31 M. Grossi , C. A. C. Fernandes , D. Sobral , J. Afonso , E. Telles , L. Bizzocchi , A. Paulino-Afonso , I. Matute

We investigate the influence of the cosmic web on galaxy properties in the IllustrisTNG simulations. To disentangle the effects of galaxy groups and cosmic filaments, we classify the cosmic web environment into four categories: group,…

Astrophysics of Galaxies · Physics 2025-06-24 Guangyao Yu , Weishan Zhu , Qi-Rui Yang , Jian-Feng Mo , Tian-Cheng Luan , Long-Long Feng

We investigate the role of environment on star-formation rates of galaxies at various cosmic densities in well-studied clusters. We present the star-forming main sequence for 163 galaxies in four EDisCS clusters in the range 0.4 $<$ z $<$…

The nature versus nurture scenario in galaxy and group evolution is a long-standing problem not yet fully understood on cosmological scales. We study the properties of groups and their central galaxies in different large-scale environments…

Astrophysics of Galaxies · Physics 2017-01-11 Anup Poudel , Pekka Heinämäki , Elmo Tempel , Maret Einasto , Heidi Lietzen , Pasi Nurmi

We investigate the relation between the star-formation activity in galaxies and environment at z=1.2 in the COSMOS field, using the fraction of [OII] emitters and the local galaxy density. The fraction of [OII] emitters appears to be almost…

The major interactions are known to trigger star formation in galaxies and alter their colour. We study the major interactions in filaments and sheets using the SDSS data to understand the influence of large-scale environments on the galaxy…

Astrophysics of Galaxies · Physics 2023-02-01 Apashanka Das , Biswajit Pandey , Suman Sarkar

We present a statistical study of the filamentary structures of the cosmic web in the large hydro-dynamical simulations Illustris-TNG, Illustris, and Magneticum at redshift z=0. We focus on the radial distribution of the galaxy density…

Cosmology and Nongalactic Astrophysics · Physics 2020-09-30 Daniela Galárraga-Espinosa , Nabila Aghanim , Mathieu Langer , Céline Gouin , Nicola Malavasi

We examine the star formation rates (SFRs) of galaxies in a redshift slice encompassing the z=0.834 cluster RX J0152.7-1357. We used a low-dispersion prism in the Inamori Magellan Areal Camera and Spectrograph (IMACS) to identify galaxies…

Cosmology and Nongalactic Astrophysics · Physics 2014-11-20 Shannon G. Patel , Bradford P. Holden , Daniel D. Kelson , Garth D. Illingworth , Marijn Franx

At z=0, clusters are primarily populated by red, elliptical and massive galaxies, while blue, spiral and lower-mass galaxies are common in low-density environments. Understanding how and when these differences were established is of…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-20 David Sobral , Philip Best , Ian Smail , Jim Geach , HiZELS team
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