Results 51 to 60 of about 4,320,326 (297)
SEDs and Beaming Effect for Fermi Blazars [PDF]
Journal of Astronomy and Space Sciences, 2016 In this work, based on our previous calculations of spectral energy distributions for a sample of Fermi blazars (Fan et al. 2015a), we calculated the radio loudness and performed correlation analyses.
Jun-Hui Fan +5 more
doaj +1 more source
The eMERLIN and EVN View of FR 0 Radio Galaxies
Galaxies, 2021 We present the results from high-resolution observations carried out with the eMERLIN UK-array and the European VLBI network (EVN) for a sample of 15 FR 0s, i.e., compact core-dominated radio sources associated with nearby early-type galaxies (ETGs ...
Ranieri D. Baldi +2 more
doaj +1 more source
THE BLACK HOLE MASS SCALE OF CLASSICAL AND PSEUDO BULGES IN ACTIVE GALAXIES [PDF]
, 2014 The mass estimator used to calculate black hole (BH) masses in broad-line active galactic nuclei (AGNs) relies on a virial coefficient (the “f factor”) that is determined by comparing reverberation-mapped (RM) AGNs with measured bulge stellar velocity ...
L. Ho +5 more
semanticscholar +1 more source
High-Frequency and High-Resolution VLBI Observations of GHz Peaked Spectrum Objects
Galaxies, 2023 Observational studies of GHz peaked spectrum (GPS) sources contribute to the understanding of the radiative properties and interstellar environment of host galaxies.
Xiaopeng Cheng +3 more
doaj +1 more source
Nuclear Activity and the Dynamics of Elliptical Galaxies
, 2004 This paper looks for any correlation between the internal dynamics of elliptical galaxies and the relatively mild nuclear activity found in many such systems.
Bender +13 more
core +2 more sources
Are galaxies with AGN a transition population?
, 2007 We present the results of an analysis of a well-selected sample of galaxies with active and inactive galactic nuclei from the Sloan Digital Sky Survey, in the range 0.01 < z < 0.16. The SDSS galaxy catalogue was split into two classes of active galaxies,
Adelman-McCarthy +62 more
core +2 more sources
Starburst–AGN mixing – II. Optically selected active galaxies [PDF]
, 2014 We use 4 galaxies from the Calar Alto Legacy Integral Field Area (CALIFA) survey with clear signs of accretion onto supermassive black holes to investigate the relative contribution of star-formation and active galactic nucleus (AGN) activity to the line-
R. Davies, L. Kewley, I. Ho, M. Dopita
semanticscholar +1 more source
Infrared Surface Brightness Analysis of Galaxies in Compact Groups
, 2006 Images of 7 Compact groups of galaxies (CG) were obtained using the 2.1m telescope in San Pedro Martir (B.C. Mexico) equipped with the NIR camera CAMILA.
Bravo-Alfaro, H. +2 more
core +2 more sources
Galaxy Evolution in the Radio Band: The Role of Star-forming Galaxies and Active Galactic Nuclei [PDF]
, 2017 We investigate the astrophysics of radio-emitting star-forming galaxies and active galactic nuclei (AGNs) and elucidate their statistical properties in the radio band, including luminosity functions, redshift distributions, and number counts at sub-mJy ...
C. Mancuso +8 more
semanticscholar +1 more source
Black hole masses in active galaxies [PDF]
, 2004 This contribution reviews two topics of current interest in the study of black hole demographics in active galaxies: Can the stellar velocity dispersions of quasar host galaxies be measured?
Barth, Aaron J.
core +2 more sources