Results 121 to 130 of about 688,273 (301)
, 2022 Galaxy clusters grow by accreting galaxies from the field and along filaments of the cosmic web. As galaxies are accreted they are affected by their local environment before they enter (pre-processing), and traverse the cluster potential. Observations that aim to constrain pre-processing are challenging to interpret because filaments comprise a ...
Kuchner, Ulrike +6 more
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Narrow-line Seyfert 1 galaxies and the evolution of galaxies and active galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2000 Narrow Line Seyfert 1 galaxies (NLS1s) are intriguing due to their continuum as well as emission line properties. The observed peculiar properties of the NLS1s are believed to be due to accretion rate close to Eddington limit. As a consequence, for a given luminosity, NLS1s have smaller black hole (BH) masses compared to normal Seyfert galaxies.
openaire +2 more sources
Open Astronomy, 2018 The properties of unstable large-scale hydrodynamic (HD) modes of oscillations in the gaseous disk of a flat galaxy with a rotation curve having a velocity jump in the inner region of the disk are numerically investigated.
Torgashin Yury, Omurkanov Turgunbek
doaj +1 more source
WFPC2 Images of the Central Regions of Early-Type Galaxies - I. The Data [PDF]
, 2001 We present high resolution R-band images of the central regions of 67 early-type galaxies obtained with the Wide Field and Planetary Camera 2 (WFPC2) aboard the Hubble Space Telescope (HST).
Armin Rest +17 more
core +2 more sources
The Auriga Project: the properties and formation mechanisms of disc galaxies across cosmic time [PDF]
, 2016 We introduce a suite of 30 cosmological magneto-hydrodynamical zoom simulations of the formation of galaxies in isolated Milky Way mass dark haloes. These were carried out with the moving mesh code arepo, together with a comprehensive model for galaxy ...
R. Grand +8 more
semanticscholar +1 more source
SUBMILLIMETER GALAXIES AS PROGENITORS OF COMPACT QUIESCENT GALAXIES [PDF]
The Astrophysical Journal, 2014 ApJ (in press)
Toft, S. +18 more
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Extended Hot Halos Around Isolated Galaxies Observed in the ROSAT All-Sky Survey
, 2012 We place general constraints on the luminosity and mass of hot X-ray emitting gas residing in extended "hot halos" around nearby massive galaxies. We examine stacked images of 2165 galaxies from the 2MASS Very Isolated Galaxy Catalog (2MVIG), as well as ...
Anderson, Michael E. +2 more
core +1 more source
The hierarchical formation of the brightest cluster galaxies [PDF]
, 2006 We use semi-analytic techniques to study the formation and evolution of brightest cluster galaxies (BCGs). We show the extreme hierarchical nature of these objects and discuss the limitations of simple ways to capture their evolution.
G. Lucia, J. Blaizot
semanticscholar +1 more source
The Evolution of Galaxy Groups and of Galaxies Therein [PDF]
, 2007 Properties of groups of galaxies depend sensitively on the algorithm for group selection, and even the most recent catalogs of groups built from redshift-space selection should suffer from projections and infalling galaxies. The cosmo-dynamical evolution of groups from initial Hubble expansion to collapse and virialization leads to a fundamental track (
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Weighing Cosmological Models with SNe Ia and Gamma Ray Burst Redshift Data
Universe, 2019 Many models have been proposed to explain the intergalactic redshift using different observational data and different criteria for the goodness-of-fit of a model to the data. The purpose of this paper is to examine several suggested models using the same
Rajendra P. Gupta
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