Results 11 to 20 of about 102,749 (268)

Narrow-line Seyfert 1 galaxies and the evolution of galaxies and active galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2000
Narrow Line Seyfert 1 galaxies (NLS1s) are intriguing due to their continuum as well as emission line properties. The observed peculiar properties of the NLS1s are believed to be due to accretion rate close to Eddington limit. As a consequence, for a given luminosity, NLS1s have smaller black hole (BH) masses compared to normal Seyfert galaxies.
Smita Mathur
openaire   +4 more sources

Janus kinase 2 inhibition by pacritinib as potential therapeutic target for liver fibrosis

Hepatology, EarlyView., 2022
Diagram of the activation of the profibrotic and procontractile Janus kinase 2 (JAK2)/Ras homolog family member A/Rho‐kinase pathway and the inhibition of phosphorylated JAK2 by pacritinib to inhibit hepatic stellate cell activity. Abstract Background and Aims Janus kinase 2 (JAK2) signaling is increased in human and experimental liver fibrosis with ...
Sandra Torres, Cristina Ortiz, Nadine Bachtler, Wenyi Gu, Leon D. Grünewald, Nico Kraus, Robert Schierwagen, Christoph Hieber, Caroline Meier, Olaf Tyc, Maximilian Joseph Brol, Frank Erhard Uschner, Bart Nijmeijer, Christoph Welsch, Marie‐Luise Berres, Carmen Garcia‐Ruiz, Jose Carlos Fernandez‐Checa, Christian Trautwein, Thomas J. Vogl, Stefan Zeuzem, Jonel Trebicka, Sabine Klein   +21 more
wiley   +1 more source

Chemical abundances in active galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2020
ABSTRACT The Sloan Digital Sky Survey (SDSS) has proved to be a powerful resource for understanding the physical properties and chemical composition of star-forming galaxies in the local Universe. The SDSS population of active galactic nuclei (AGNs) remains as of yet less explored in this capacity.
Flury, Sophia R., Moran, Edward C.
openaire   +2 more sources

Shock Excitation in Narrow-line Regions Powered by AGN Outflows

The Astrophysical Journal, 2023
Outflows in an active galactic nucleus (AGN) are considered to play a key role in the evolution of the host galaxy through transfer of a large amount of energy.
Misaki Mizumoto, Hiroaki Sameshima, Naoto Kobayashi, Noriyuki Matsunaga, Sohei Kondo, Satoshi Hamano, Chikako Yasui, Kei Fukue, Akira Arai, Hideyo Kawakita, Shogo Otsubo, Giuseppe Bono, Ivo Saviane   +12 more
doaj   +1 more source

Quantifying correlations between galaxy emission lines and stellar continua [PDF]

, 2016
We analyse the correlations between continuum properties and emission line equivalent widths of star-forming and active galaxies from the Sloan Digital Sky Survey.
Beck, Róbert, Csabai, István, Dobos, László, Szalay, Alexander S., Yip, Ching-Wa   +4 more
core   +3 more sources

Statistical Properties of Radio Emission from the Palomar Seyfert Galaxies [PDF]

, 2001
We have carried out an analysis of the radio and optical properties of a statistical sample of 45 Seyfert galaxies from the Palomar spectroscopic survey of nearby galaxies.
Antonucci R. R. J., Busko I. C., Clark D. H., de Bruyn A. G., de Bruyn A. G., de Grijp M. H. K., Isobe T., James S. Ulvestad, Kukula M. J., Luis C. Ho, Meurs E. J. A., Pedlar A., Perley R. A., Unger S. W., Whittle M., Whittle M.   +15 more
core   +2 more sources

The Origin and Evolution of Giant Radio Galaxies

Frontiers in Astronomy and Space Sciences, 2022
Giant radio galaxies are arguably the least understood of jetted active galactic nuclei (AGN). We propose that radio galaxies are the product of large mergers that do not involve radio galaxies or radio quasars, such as in merging spiral galaxies, while ...
David Garofalo
doaj   +1 more source

The Seyfert-Starburst Connection in X-rays. II. Results and Implications [PDF]

, 2000
We present the results of X-ray imaging and spectroscopic analysis of a sample of Seyfert 2 galaxies that contain starbursts, based on their optical and UV characteristics. These composite galaxies exhibit extended, soft, thermal X-ray emission, which we
Awaki H., Green P. J., K. A. Weaver, Kukula M. J., Laurikainen E., Maiolino R., Malaguti G., Mas-Hesse J. M., Matt G., Matt G., N. A. Levenson, Nandra K., Pedlar A., Risaliti G., Sansom A. E., T. M. Heckman, Unger S. W.   +16 more
core   +2 more sources

The Classifications and Some Correlations for Fermi Blazars

Galaxies, 2016
In a recent paper, we constructed the spectral energy distributions (SEDs) for 1425 Fermi blazars. We classify them as low synchrotron peak sources (LSPs) if log ν p ( Hz ) ≤ 14.0, intermediate synchrotron peak sources (ISPs) if 14.0 <
Junhui Fan, Yi Liu, Jianghe Yang, Chao Lin, Jingmeng Hao, Hubing Xiao   +5 more
doaj   +1 more source

Systematic Research of Low-redshift Optically Selected SDSS Type 2 AGNs but with Apparent Long-term Optical Variabilities from Catalina Sky Survey. I. Data Sample and Basic Results

The Astrophysical Journal Supplement Series, 2023
The main objective of this article, the first in a dedicated series, is to report basic results on systematic research of low-redshift optically selected SDSS Type 2 active galactic nuclei (AGNs) but with apparent optical variabilities.
XueGuang Zhang
doaj   +1 more source