Results 91 to 100 of about 2,699,041 (235)

A comprehensive picture of baryons in groups and clusters of galaxies [PDF]

Astronomy & Astrophysics, 2013
(Abridged) Based on XMM-Newton, Chandra and SDSS data, we investigate the baryon distribution in groups and clusters and its use as a cosmological constraint. For this, we considered a sample of 123 systems, with total masses in the mass range M500 = ~ 10^13 - 4 x 10^15 h_70^-1 Msun. The gas masses and total masses are derived from X-ray data under the
Laganá, T., Martinet, N., Durret, F., Lima Neto, G., Maughan, B., Zhang, Y.-Y.   +5 more
openaire   +6 more sources

Test of Cosmic Web-feeding Model for Star Formation in Galaxy Clusters in the COSMOS Field

The Astrophysical Journal
It is yet to be understood how large-scale environments influence star formation activity in galaxy clusters. One recently proposed mechanism is that galaxy clusters can remain star forming when fed by infalling groups and star-forming galaxies from ...
Eunhee Ko, Myungshin Im, Seong-Kook Lee, Clotilde Laigle   +3 more
doaj   +1 more source

Filaments of galaxies and Voronoi diagrams

Open Astronomy, 2018
The intersections between a spherical shell and the faces of Voronoi polyhedrons are numerically evaluated. The nodes of these intersections are the points that share the same distances from three nuclei.
Zaninetti Lorenzo
doaj   +1 more source

Simulating Groups and the IntraGroup Medium: The Surprisingly Complex and Rich Middle Ground between Clusters and Galaxies

Universe, 2021
Galaxy groups are more than an intermediate scale between clusters and halos hosting individual galaxies, they are crucial laboratories capable of testing a range of astrophysics from how galaxies form and evolve to large scale structure (LSS) statistics
Benjamin D. Oppenheimer, Arif Babul, Yannick Bahé, Iryna S. Butsky, Ian G. McCarthy   +4 more
doaj   +1 more source

The evolution of the star formation activity per halo mass up to redshift ~1.6 as seen by Herschel [PDF]

, 2012
Aims. Star formation in massive galaxies is quenched at some point during hierarchical mass assembly. To understand where and when the quenching processes takes place, we study the evolution of the total star formation rate per unit total halo mass (Σ ...
Capak, P., Fadda, D., Popesso, P.
core  

Hot Gas in Galaxy Groups: Recent Observations

, 2012
Galaxy groups are the least massive systems where the bulk of baryons begin to be accounted for. Not simply the scaled-down versions of rich clusters following self-similar relations, galaxy groups are ideal systems to study baryon physics, which is ...
Baumgartner W H, Bower R G, Buote D A, Buote D A, Burenin R A, Bîrzan L, Cavagnolo K W, Cavagnolo K W, Cavagnolo K W, Dai X, Diehl S, Dunkley J, Dunn R J H, Eckert D, Finoguenov A, Finoguenov A, Freeland E, Fukazawa T, Gastaldello F, Giodini S, Gitti M, Gonzalez A H, Helsdon S F, Humphrey P J, Humphrey P J, Humphrey P J, Koester B P, Komatsu E, Komiyama M, Leauthaud A, Leauthaud A, Lin Y T, Lin Y T, Lueker M, M Sun, Mahdavi A, Maughan B J, McCarthy I G, McDonald M, McNamara B R, Motl P M, Mulchaey J S, Murakami H, Nagai D, O'Hara T B, O'Sullivan E, Puchwein E, Rafferty D A, Randall S W, Rasia E, Rasmussen J, Reichardt C L, Renzini A, Rozo E, Rozo E, Rykoff E S, Sato K, Sehgal N, Shaw L D, Shirokoff E, Sun M, Sun M, Sun M, Sun M, Sun M, Tonry J L, Trac H, Vikhlinin A, Vikhlinin A, Vikhlinin A, von der Linden A, Wetzel A R Tinker J L Conroy C   +71 more
core   +1 more source

Missing Baryons, from Clusters to Groups of Galaxies [PDF]

The Astrophysical Journal, 2007
From clusters to groups of galaxies, the powerful bremsstrahlung radiation L_X emitted in X rays by the intracluster plasma is observed to decline sharply with lowering virial temperatures T (i.e., at shallower depths of the gravitational wells) after a steep local L_X-T correlation; this implies increasing scarcity of diffuse baryons relative to dark ...
Cavaliere, A., Lapi, A.
openaire   +4 more sources

Analysis of carbohydrates and glycoconjugates by matrix‐assisted laser desorption/ionization mass spectrometry: An update for 2021–2022

Mass Spectrometry Reviews, EarlyView.
Abstract The use of matrix‐assisted laser desorption/ionization (MALDI) mass spectrometry for the analysis of carbohydrates and glycoconjugates is a well‐established technique and this review is the 12th update of the original article published in 1999 and brings coverage of the literature to the end of 2022.
David J. Harvey
wiley   +1 more source

Some Properties of Galaxy Structures

Open Astronomy, 2011
We analysed some properties of galaxies structures based on the PF catalog of galaxy structures (Panko & Flin 2006) and the Tully NBG catalog (Tully 1988).
Flin Piotr, Biernacka Monika, Godłowski Włodzimierz, Panko Elena, Piwowarska Paulina   +4 more
doaj   +1 more source

The FRB 20190520B Sight Line Intersects Foreground Galaxy Clusters

The Astrophysical Journal Letters, 2023
The repeating fast radio burst FRB 20190520B is an anomaly of the FRB population thanks to its high dispersion measure (DM = 1205 pc cm ^−3 ) despite its low redshift of z _frb = 0.241.
Khee-Gan Lee, Ilya S. Khrykin, Sunil Simha, Metin Ata, Yuxin Huang, J. Xavier Prochaska, Nicolas Tejos, Jeff Cooke, Kentaro Nagamine, Jielai Zhang   +9 more
doaj   +1 more source