Results 81 to 90 of about 37,453 (224)

Coherent State Description of Astrophysical Gamma-Ray Amplification from a Para-Positronium Condensate

Particles
The para-positronium system S01Ps is described by means of specially constructed coherent states (CSs) in the Klauder–Perelomov sense. It is analyzed from the physical point of view and from the geometry underlying the relevant symmetry group ...
Diego Julio Cirilo-Lombardo
doaj   +1 more source

The ISO-2MASS AGN survey [PDF]

, 2006
Bei der Suche nach AGN im Optischen/UV werden kaum staubgerötete Objekte gefunden. Jedoch ist vom Radio/Röntgen-Bereich die Existenz solcher AGN bekannt.
Leipski, Christian, Leipski, Christian (Dipl.)   +1 more
core   +2 more sources

Continuum Reverberation Mapping of AGN Accretion Disks

, 2017
We show recent detections of inter-band continuum lags in three AGN (NGC 5548, NGC 2617, and MCG+08-11-011), which provide new constraints on the temperature profiles and absolute sizes of the accretion disks.
the AGN STORM Collaboration, Keith Horne, Bradley M. Peterson, David A. Starkey, Michael M. Fausnaugh   +4 more
core   +1 more source

IFU observations of luminous type II AGN- I. Evidence for ubiquitous winds [PDF]

, 2014
We present observations of 17 luminous (log(L[O III]/L)> 8.7) local (z < 0.11) type II AGN. Our aim is to investigate the prevalence and nature of AGN driven outflows in these galaxies by combining kinematic and ionization diagnostic infor-mation ...
Medling, Anne M., Rob Sharp, McElroy, Rebecca, Croom, Scott M., Michael Pracy, Pracy, Michael, Sharp, Rob, Scott M. Croom, Rebecca Mcelroy, Anne M. Medling, Ho, I-Ting   +10 more
core   +1 more source

Identifying Transitions in Changing-look Active Galactic Nuclei in Light-curve Data with the Zwicky Transient Facility

The Astrophysical Journal
Changing-look active galactic nuclei (CL-AGN) are AGN that transition between Seyfert types, challenging AGN unification models. Most CL-AGN have been identified via repeat spectroscopy, making it difficult to determine the duration and magnitude of the ...
Margaret E. Verrico, K. Decker French, Vivienne F. Baldassare, Colin J. Burke, Laura Duffy, Nicholas Earl, Megan Harrison, Jason T. Hinkle, Alexander Messick, Samaresh Mondal, Yashasvi Moon, Margaret Shepherd, Zachary Stone   +12 more
doaj   +1 more source

Effect of Ultrafine Powderization and Solid Dispersion Formation via Hot-Melt Extrusion on Antioxidant, Anti-Inflammatory, and the Human Kv1.3 Channel Inhibitory Activities of Angelica gigas Nakai

Bioinorganic Chemistry and Applications, 2020
Angelica gigas Nakai (AGN) was first processed by ultrafine grinding technology and hot-melt extrusion (HME). The potential antioxidant and anti-inflammatory activities of AGN with a different process were compared, and the effect on the human Kv1.3 ...
Yunyao Jiang, Jingpei Piao, Nan Liu, Jincai Hou, Jianxun Liu, Weicheng Hu   +5 more
doaj   +1 more source

Kinematics of AGN jets

Journal of Physics: Conference Series, 2008
The fine-scale structure and the kinematics of relativistic active galactic nuclei (AGN) jets have been studied by very-long-baseline interferometry at very high resolutions since 1998 at 2 cm wavelength for a sample of over a hundred radio sources (VLBA 2cm Survey and MOJAVE programs).
openaire   +2 more sources

The First Triple Radio Active Galactic Nucleus in an Ongoing Galaxy Merger

The Astrophysical Journal Letters
Galaxy mergers are predicted to be a critical stage of merger-driven SMBH growth and galaxy evolution. Systems exhibiting multiple active galactic nuclei (AGN) are an important observational tool for constraining the prevalence and properties of merging ...
Emma Schwartzman, Ryan W. Pfeifle, Tracy E. Clarke, Kimberly A. Weaver, Nathan J. Secrest, Barry Rothberg, Miranda McCarthy, Daniel Stern, Peter G. Boorman, Joanna Piotrowska   +9 more
doaj   +1 more source

A Panchromatic View of AGN [PDF]

, 2004
We review the continuum emission of Active Galactic Nuclei (AGN) over the entire electromagnetic spectrum. After a brief historical introduction, we describe the main spectral properties of unobscured AGN, discussing the selection biases which prevent us from having a complete view of the AGN population in the universe, and trying to build an updated ...
Risaliti, G., Elvis, M.
openaire   +2 more sources

Temporal Structure of AGN Light Curves [PDF]

, 2006
In der vorliegenden Arbeit wurden die physikalische Eigenschaften aktiver galaktischer Kerne untersucht. Aktive galaktische Kerne (AGN) sind durch ihr breitbandiges Spektrum und schnelle, gewaltige Leuchtkraftvariationen charakterisiert.
Arevalo, Patricia
core   +1 more source