Results 81 to 90 of about 102,425 (297)

An Exceptionally Powerful, Radiatively Driven Ultrafast Outflow in the Rapidly Accreting AGN RE J1034+396

The Astrophysical Journal
We report the analysis of ∼1 Ms of XMM-Newton observations of the rapidly accreting active galactic nucleus RE J1034+396. The 0.3–9 keV EPIC-pn spectra are well described by a model consisting of steep continuum emission from the corona accompanied by ...
Chloe S. Taylor, Daniel R. Wilkins, Steven W. Allen   +2 more
doaj   +1 more source

The Infrared Continuum of Active Galaxies

, 2003
We discuss the different physical processes contributing to the infrared continuum of AGN, assuming that both photoionization from the active center and shocks ionize and heat the gas and dust contained in an ensemble of clouds surrounding the nucleus ...
Allen, Alonso-Herrero, Antonucci, Arp, Barvainis, Blain, Carico, Chini, Ciroi, Condon, Contini, Contini, Contini, Contini, Contini, Contini, Contini, Contini, Contini, Contini, de Vaucouleurs, Douglas, Draine, Draine, Dressel, Dunne, Dwek, Dwek, Eales, Edelson, Granato, Granato, Gregory, Jarrett, Laor, M. A. Prieto, M. Contini, Nenkova, Pier, Pier, Rieke, Rigopolous, Rowan-Robinson, S. M. Viegas, Shull, Siebenmorgen, Soifer, Spinoglio, Spinoglio, Vaceli, Viegas, Viegas, Waldram, White, Zwicky   +54 more
core   +2 more sources

The Infrared Traced Star Formation Rates of Associated Absorption Lines Quasars

The Astrophysical Journal
Some optically selected quasars exhibit Mg ii- associated absorption lines (AALs), and their origin remains unclear. In this paper, we compile a sample of 1769 quasars, with or without Mg ii AALs, of which 1689 are far-infrared (FIR) detected quasars and
Zhe-Geng Chen, Rui-Jing Lu, Zhi-Fu Chen, Wen-Qiang Liang, Xing-Long Peng, Jing Li, Wei-Rong Huang   +6 more
doaj   +1 more source

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.
openaire   +2 more sources

The Curious Case of CysE: Diversity and Distribution of Serine Acetyltransferases in Bacteria

Proteins: Structure, Function, and Bioinformatics, EarlyView.
ABSTRACT Serine acetyltransferase (CysE) is a member of the left‐handed β‐helix family of acetyltransferases that catalyze the rate limiting step in de novo cysteine biosynthesis. There are two isoforms of CysE that differ in length, with the shorter isoform lacking approximately 76 amino acids at the N‐terminus of the protein from the serine ...
Keely E. A. Oldham, Adele K. Williamson, Emily K. Grout, Joanna L. Hicks   +3 more
wiley   +1 more source

Are radio galaxies and quiescent galaxies different? Results from the analysis of HST brightness profiles

, 2005
We present a study of the optical brightness profiles of early type galaxies, using a number of samples of radio galaxies and optically selected elliptical galaxies.
A. Capetti, Bender, Bender, Bender, Bettoni, Bettoni, Byun, Capetti, Capetti, Carollo, Carollo, Chiaberge, Crane, De Koff, de Ruiter, de Ruiter, Djorgovski, Dressler, Faber, Fanti, Ferrarese, Gebhardt, Gonzalez-Serrano, Gonzalez-Serrano, Graham, Graham, H. R. de Ruiter, Jaffe, Kormendy, L. Santantonio, Laine, Lauer, Lauer, Lauer, Lauer, Lucy, Magorrian, Martel, McLure, McLure, Milosavljevic, Morganti, Morganti, P. Parma, Parma, Parma, Parma, Pellegrini, R. Fanti, R. Morganti, Ravindranath, Rest, Richardson, Sandage, Smith, Trujillo, van der Marel, Verdoes Kleijn, Wandel, Wilson, Woo   +60 more
core   +1 more source

Survey on AI‐Enabled Computer Vision Technologies and Applications for Space Robotic Missions

Journal of Field Robotics, EarlyView.
ABSTRACT This survey provides a comprehensive overview of recent advancements and challenges in Artificial Intelligence (AI)‐enabled computer vision (CV) techniques for space robotic missions, spanning critical phases such as Entry, Descent, and Landing (EDL), orbital operations, and planetary surface exploration.
Maciej Quoos, Steven Kay, Julia Wajoras, Robert Field, Evridiki V. Ntagiou, Fakher Mohammad, Yang Gao   +6 more
wiley   +1 more source

Blowing Star Formation Away in AGN Hosts (BAH). II. Investigating the Origin of the H2 Emission Excess in Nearby Galaxies with JWST MIRI

The Astrophysical Journal
We use James Webb Space Telescope Mid-Infrared Instrument Medium-resolution Spectrometer observations of 3C 293 (UGC 8782), CGCG 012-070 and NGC 3884 to investigate the origin of the H _2 emission.
Rogemar A. Riffel, Gabriel L. Souza-Oliveira, José Henrique Costa-Souza, Nadia L. Zakamska, Thaisa Storchi-Bergmann, Rogério Riffel, Marina Bianchin   +6 more
doaj   +1 more source

Mind and Cosmos as Throughput Systems: A Convergence Through the Throughput Model

Systems Research and Behavioral Science, EarlyView.
ABSTRACT This paper advances a conceptual and mathematical foundations approach by applying the throughput model (TPM) to cosmic phenomena, reframing the universe as an extended information processing system. TPM's four stages, Perception, Information, Judgement and Decision Choice, are reformulated in explicit information‐theoretic and dynamical ...
Waymond Rodgers
wiley   +1 more source

The Seyfert Population in the Local Universe

, 2003
The magnitude-limited catalog of the Southern Sky Redshift Survey (SSRS2), is used to characterize the properties of galaxies hosting Active Galactic Nuclei.
Christopher N. A. Willmer, Efstathiou G., Felten J. E., Kelm B., Kohler T., Kollatschny W., Laurikainen E., Laurikainen E., Maddox S. J., Maia M. A. G., Marcio A. G. Maia, Noguchi M., Petrosian A. R., Rodolfo S. Machado   +13 more
core   +1 more source