Results 21 to 30 of about 126,286 (222)
Identifying Active Galactic Nuclei at z ∼ 3 from the HETDEX Survey Using Machine Learning
The Astronomical Journal, 2023 We used data from the Hobby–Eberly Telescope Dark Energy Experiment (HETDEX) to study the incidence of AGN in continuum-selected galaxies at z ∼ 3.
Valentina Tardugno Poleo +11 more
doaj +1 more source
Infrared observations of AGN [PDF]
Proceedings of the International Astronomical Union, 2004 We present results from an imaging and spectroscopic study of the dust properties of Seyfert galaxies in the 1-10um range. The data are compared to state of the art models of torus emission to constrain geometrical and physical properties of the obscuring medium.
Lira, P. +5 more
openaire +2 more sources
, 2009 We present the Spitzer 10-37um IRS high resolution (R~600) spectroscopic survey of the Seyfert galaxies of the 12 micron Galaxy Sample. The new spectra of 61 galaxies, with those already published, gives us a total of 91 12micron Seyfert galaxies ...
Antonucci +49 more
core +1 more source
Origin and properties of dual and offset active galactic nuclei in a cosmological simulation at z=2
, 2016 In the last few years, it became possible to observationally resolve galaxies with two distinct nuclei in their centre. For separations smaller than 10kpc, dual and offset active galactic nuclei (AGN) are distinguished: in dual AGN, both nuclei are ...
Comerford, Julia M. +5 more
core +3 more sources
The radio AGN population dichotomy: Green valley Seyferts versus red sequence low-excitation AGN [PDF]
, 2009 Radio outflows of active galactic nuclei (AGN) are invoked in cosmological models as a key feedback mechanism in the latest phases of massive galaxy formation.
Bell +18 more
core +1 more source
Do Bars Trigger Activity in Galactic Nuclei?
, 2012 We investigate the connection between the presence of bars and AGN activity, using a volume-limited sample of $\sim$9,000 late-type galaxies with axis ratio $b/a>0.6$ and $M_{r} < -19.5+5{\rm log}h$ at low redshift ($0.02\le z\lesssim 0.055$), selected ...
Hwang, Ho Seong +6 more
core +1 more source
Proceedings of the International Astronomical Union, 2009 AbstractIn the BPT diagram, the distribution of the emission-line galaxies from the Sloan Digital Sky Survey (SDSS) evokes the wings of a seagull. Traditionally, galaxies in the right wing are considered to host AGNs. Our study of the stellar populations of SDSS galaxies showed that ~ 1/4 of galaxies thought to host LINERs are in fact “retired galaxies,
Stasinska, Grazyna +2 more
openaire +2 more sources
Advanced Materials Interfaces, EarlyView.Biodegradable polymeric films incorporated with a synergistic blend of metallic nanocomposites are developed and characterized. The films exhibit enhanced antibacterial activity against foodborne pathogens, demonstrating their potential as active materials for food packaging.
Adriana Dos Santos Silva +5 more
wiley +1 more source
The major merger–active galactic nucleus connection up to cosmic noon
Astronomy & AstrophysicsGalaxy major mergers are a potential mechanism for triggering active galactic nuclei (AGN) activity, but their role remains debated, particularly beyond the local Universe.
La Marca A. +5 more
doaj +1 more source
Active Galactic Nuclei Feedback in SDSS-IV MaNGA: AGNs Have Suppressed Central Star Formation Rates
The Astrophysical Journal, 2023 Despite the importance of feedback from active galactic nuclei (AGNs) in models of galaxy evolution, observational constraints on the influence of AGN feedback on star formation remain weak.
Caleb Lammers +6 more
doaj +1 more source