Results 91 to 100 of about 688,273 (301)
Cosmological Model Tests with JWST
Galaxies, 2022 The James Webb Space Telescope (JWST), which has recently become operational, is capable of detecting objects at record-breaking redshifts, z≳15. This is a crucial advance for observational cosmology, as at these redshifts the differences between ...
Nikita Lovyagin +3 more
doaj +1 more source
The environment of AGNs and the activity degree of their surrounding galaxies
, 2012 Aims. We present results of a comprehensive spectral study on the large-scale environment of AGNs based on Sloan Spectroscopic Survey data. Methods. We analyzed the spectra of galaxies in the environment of AGN and other activity classes up to distances ...
Kollatschny, W. +2 more
core +1 more source
The nature of red dwarf galaxies [PDF]
, 2009 Using dark matter halos traced by galaxy groups selected from the Sloan Digital Sky Survey Data Release 4, we find that about 1/4 of the faint galaxies ($\rmag >-17.05$, hereafter dwarfs) that are the central galaxies in their own halo are not blue and ...
Adelman-McCarthy +27 more
core +3 more sources
Evolutionary population synthesis: models, analysis of the ingredients and application to high‐z galaxies [PDF]
, 2004 Evolutionary population synthesis models for a wide range of metallicities, ages, star formation histories, initial mass functions and horizontal branch morphologies, including blue morphologies at high metallicity, are computed.
C. Maraston
semanticscholar +1 more source
Radial Acceleration Relation in Rotationally Supported Galaxies. [PDF]
Physical Review Letters, 2016 We report a correlation between the radial acceleration traced by rotation curves and that predicted by the observed distribution of baryons. The same relation is followed by 2693 points in 153 galaxies with very different morphologies, masses, sizes ...
S. McGaugh, F. Lelli, J. Schombert
semanticscholar +1 more source
Galaxy–galaxy lensing in the VOICE deep survey
Astronomy & Astrophysics, 2022 The multi-band photometry of the VOICE imaging data, overlapping with 4.9 deg2of theChandraDeep Field South (CDFS) area, enables both shape measurement and photometric redshift estimation to be the two essential quantities for weak lensing analysis. The depth of magABis up to 26.1 (5σlimiting) inr-band.
Ruibiao Luo +13 more
openaire +3 more sources
Narrow-line Seyfert 1 Galaxies and the M_BH - sigma Relation
, 2007 We have studied the location of narrow-line Seyfert 1 (NLS1) galaxies and broad-line Seyfert 1 (BLS1) galaxies on the M_BH - sigma relation of non-active galaxies.
D. Xu, Ferrarese L., S. Komossa, Silk J.
core +1 more source
UniverseIn terms of the variable nature of normal active galaxy nuclei (AGN) and luminous quasars, a so-called flux variation gradient (FVG) method has been widely utilized to estimate the underlying non-variable host galaxy fluxes.
Minxuan Cai +4 more
doaj +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 +4 more
doaj +1 more source
The Host Galaxies of Short GRBs as Probes of Their Progenitor Properties
Galaxies, 2019 We present and discuss the properties of host galaxies of short Gamma-ray Burst (SGRBs). In particular, we examine those observations that contribute to the understanding of the progenitor systems of these explosions. Most SGRB hosts are found to be star
Massimiliano De Pasquale
doaj +1 more source