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We study the formation and evolution of filamentary configurations of dark matter haloes in voids. Our investigation uses the high-resolution LambdaCDM simulation CosmoGrid to look for void systems resembling the VGS_31 elongated system of…

Cosmology and Nongalactic Astrophysics · Physics 2013-08-22 Steven Rieder , Rien van de Weygaert , Marius Cautun , Burcu Beygu , Simon Portegies Zwart

We study the formation and evolution of the cosmic web, using the high-resolution CosmoGrid \$\Lambda\$CDM simulation. In particular, we investigate the evolution of the large-scale structure around void halo groups, and compare this to…

Cosmology and Nongalactic Astrophysics · Physics 2016-10-19 Steven Rieder , Rien van de Weygaert , Marius Cautun , Burcu Beygu , Simon Portegies Zwart

Voids represent a unique environment for the study of galaxy evolution, as the lower density environment is expected to result in shorter merger histories and slower evolution of galaxies. This provides an ideal opportunity to test theories…

Context. Cosmic voids are underdense regions of the Universe that provide a unique environment to study galaxy evolution in relative isolation. Galaxy triplets in voids are rare systems where local interactions may strongly influence galaxy…

Astrophysics of Galaxies · Physics 2026-01-14 G. M. Azevedo , A. L. Chies-Santos , R. Riffel , I. Perez , F. Ferrari , R. S. de Souza , M. Argudo-Fernandéz , B. Bidaran

VGS31b is a highly-inclined ring galaxy found along a filament in a void (Kreckel et al. 2012). Detailed photometry, by using u, g, r, i, z SDSS images, has shown that the overall morphology of VGS31b is very tricky, due to (i) the presence…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-16 M. Spavone , E. Iodice

The analysis of images (of obtained in various ranges of the lengths of waves) of luminous objects in the Universe by means of a method of multilevel dynamic contrasting led author to the conclusions: a) the structures of all observable…

Astrophysics · Physics 2015-05-13 V. A. Rantsev-Kartinov

The large-scale structure (LSS) of the Universe is comprised of galaxy filaments, tendrils, and voids. The majority of the Universe's volume is taken up by these voids, which exist as underdense, but not empty, regions. The galaxies found…

We present the structural and star formation properties of 59 void galaxies as part of the Void Galaxy Survey (VGS). Our aim is to study in detail the physical properties of these void galaxies and study the effect of the void environment…

Void galaxies, residing within the deepest underdensities of the Cosmic Web, present an ideal population for the study of galaxy formation and evolution in an environment undisturbed by the complex processes modifying galaxies in clusters…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-19 K. Kreckel , E. Platen , M. A. Aragón-Calvo , J. H. van Gorkom , R. van de Weygaert , J. M. van der Hulst , K. Kovač , C. -W. Yip , P. J. E. Peebles

Galaxies in the Universe are distributed in a web-like structure characterised by different large-scale environments: dense clusters, elongated filaments, sheetlike walls, and under-dense regions, called voids. The low density in voids is…

The Void Galaxy Survey (VGS) is a multi-wavelength program to study $\sim$60 void galaxies. Each has been selected from the deepest interior regions of identified voids in the SDSS redshift survey on the basis of a unique geometric…

The properties of galaxies in low-density regions of the universe suggest an interplay between galaxy formation and environment. However, the specific reason why this particular large-scale environment influences the evolution of galaxies…

Astrophysics of Galaxies · Physics 2024-01-17 Agustín Rodríguez-Medrano , Volker Springel , Federico Stasyszyn , Dante Paz

We analyze photometry from deep B-band images of 59 void galaxies in the Void Galaxy Survey (VGS), together with their near-infrared 3.6$\mu$m and 4.5$\mu$m Spitzer photometry. The VGS galaxies constitute a sample of void galaxies that were…

The standard paradigm for the formation of the Universe suggests that large structures are formed from hierarchical clustering by the continuous accretion of less massive galaxy systems through filaments. In this context, filamentary…

Astrophysics of Galaxies · Physics 2023-12-29 Noelia R. Perez , Luis A. Pereyra , Georgina Coldwell , Facundo Rodriguez , Ignacio G. Alfaro , Andrés N. Ruiz

We explore the morphology of galaxies living in the proximity of cosmic voids, using a sample of voids identified in the Sloan Digital Sky Survey Data Release 7. At all stellar masses, void galaxies exhibit morphologies of a later type than…

Astrophysics of Galaxies · Physics 2017-09-06 Elena Ricciardelli , Antonio Cava , Jesus Varela , Amelie Tamone

We have carefully selected a sample of 60 galaxies that reside in the deepest underdensities of geometrically identified voids within the SDSS. HI imaging of 55 galaxies with the WSRT reveals morphological and kinematic signatures of…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-04 K. Kreckel , E. Platen , M. A. Aragón-Calvo , J. H. van Gorkom , R. van de Weygaert , J. M. van der Hulst , B. Beygu

We present the detection of molecular gas from galaxies located in nearby voids using the CO line emission as a tracer. The observations were done using the 45m Nobeyama Radio Telescope. Void galaxies lie in the most under dense parts of…

Astrophysics of Galaxies · Physics 2015-12-16 M. Das , T. Saito , D. Iono , M. Honey , S. Ramya

We propose a physically based, analytic model for intergalactic filaments during the first gigayear of the universe. The structure of a filament is based upon a gravitationally bound, isothermal cylinder of gas. The model successfully…

Astrophysics of Galaxies · Physics 2017-12-27 A. Gayler Harford , Andrew J. S. Hamilton

We investigate the impact of filament and void environments on galaxies, looking for residual effects beyond the known relations with environment density. We quantified the host environment of galaxies as the distance to the spine of the…

Astrophysics of Galaxies · Physics 2017-03-29 Teet Kuutma , Antti Tamm , Elmo Tempel
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