Results 1 to 10 of about 141,201 (236)

Environment and Gas Fraction in Type 2 AGN versus Non-AGN Galaxies

open access: goldThe Astrophysical Journal
We investigate the environmental parameters and gas fraction ( f _gas ) properties of type 2 active galactic nuclei (AGN) and non-AGN galaxies, utilizing a large sample of galaxies from the Sloan Digital Sky Survey DR7 with z ≤ 0.3.
Jyoti Yadav   +2 more
doaj   +2 more sources

A complete catalogue of merger fractions in AGN hosts: No evidence for an increase in detected merger fraction with AGN luminosity

open access: yesThe Open Journal of Astrophysics, 2023
Despite the importance of Active Galactic Nuclei (AGN) in galaxy evolution, the mechanisms that fuel AGN activity remain poorly understood. Theoretical models suggest that major mergers of galaxies contribute strongly to AGN fuelling, particularly at ...
Carolin Villforth
doaj   +1 more source

SDSS-IV MaNGA: How Galaxy Interactions Influence Active Galactic Nuclei

open access: yesThe Astrophysical Journal, 2023
We present a comparative study of active galactic nuclei (AGN) between galaxy pairs and isolated galaxies with the final data release of the MaNGA integral field spectroscopic survey.
Joshua L. Steffen   +9 more
doaj   +1 more source

A Multiwavelength Study of Active Galactic Nuclei in Post-merger Remnants

open access: yesThe Astrophysical Journal, 2023
We investigate the role of galaxy mergers in triggering active galactic nuclei (AGN) in the nearby universe. Our analysis is based on a sample of 79 post-merger remnant galaxies with deep X-ray observations from Chandra/XMM-Newton capable of detecting a ...
Wenhao Li   +11 more
doaj   +1 more source

Characterization of AGN and their hosts in the Extended Groth Strip: a multiwavelength analysis [PDF]

open access: yes, 2008
We have employed a reliable technique of classification of Active Galactic Nuclei (AGN) based on the fit of well-sampled spectral energy distributions (SEDs) with a complete set of AGN and starburst galaxy templates. We have compiled ultraviolet, optical,
Alexander   +56 more
core   +3 more sources

REVERBERATION MEASUREMENT OF THE INNER RADIUS OF THE DUST TORUS IN NGC 4151 DURING 2008-2013

open access: yesOdessa Astronomical Publications, 2014
We investigate the correlation between infrared (JHKL) and optical (B) fluxes of the variable nucleus of the Seyfert galaxy NGC 4151 using partially published data for the last 6 years (2008-2013).
V. L. Oknyansky   +6 more
doaj   +1 more source

Angelica gigas Nakai and Soluplus-Based Solid Formulations Prepared by Hot-Melting Extrusion: Oral Absorption Enhancing and Memory Ameliorating Effects. [PDF]

open access: yesPLoS ONE, 2015
Oral solid formulations based on Angelica gigas Nakai (AGN) and Soluplus were prepared by the hot-melting extrusion (HME) method. AGN was pulverized into coarse and ultrafine particles, and their particle size and morphology were investigated.
Jingpei Piao   +7 more
doaj   +1 more source

A Tale of Two Populations: The Contribution of Merger and Secular Processes to the Evolution of Active Galactic Nuclei [PDF]

open access: yes, 2012
Due to the co-evolution of supermassive black holes and their host galaxies, understanding the mechanisms that trigger active galactic nuclei (AGN) are imperative to understanding galaxy evolution and the formation of massive galaxies.
Ballantyne, David R., Draper, Aden R.
core   +1 more source

Antifungal Activity of Angelica gigas with Enhanced Water Solubility of Decursin and Decursinol Angelate by Hot-Melt Extrusion Technology against Candida albicans

open access: yesInternational Journal of Translational Medicine, 2022
Hot-melt extrusion (HME) has been an alternative technique to improve the solubility and bioavailability of active molecules with low water solubility.
Suji Ryu   +3 more
doaj   +1 more source

High Redshift Quasars, Emission Lines and ‘Cloudy’

open access: yesOpen Astronomy, 2011
I describe some of the outstanding “big picture” questions in quasar research and how the development of the plasma simulation code Cloudy is being guided to answer them.
Ferland Gary J.
doaj   +1 more source

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