Results 71 to 80 of about 78,490 (277)

Jetted Active Galactic Nuclei

, 2018
I will review the current understanding of the observational and physical properties of jetted active galactic nuclei.
openaire   +2 more sources

The incidence of obscuration in active galactic nuclei [PDF]

Monthly Notices of the Royal Astronomical Society, 2013
We study the incidence of nuclear obscuration on a complete sample of 1310 AGN selected on the basis of their rest-frame 2-10 keV X-ray flux from the XMM-COSMOS survey, in the redshift range 0 ...
Vincenzo Mainieri, Kazushi Iwasawa, Andrea Merloni, G. Zamorani, L. Riguccini, Fabrizio Fiore, Ezequiel Treister, John D. Silverman, Marcella Brusa, Cristian Vignali, Nico Cappelluti, David J. Rosario, M. Symeonidis, M. Symeonidis, Elisabeta Lusso, Roberto Gilli, Angela Bongiorno, Andrea Comastri, Takamitsu Miyaji, Takamitsu Miyaji, Mara Salvato, S. Berta, Benjamin Magnelli, Francesca Pozzi, E. Le Floc'h, Dieter Lutz, Anton M. Koekemoer   +26 more
openaire   +6 more sources

A Proposed Circular Economy Readiness Framework for the Rail Sector, A Literature Review and Conceptual Framework

Business Strategy and the Environment, EarlyView.
ABSTRACT The circular economy (CE) offers a transformative approach to addressing global sustainability challenges, yet few frameworks integrate it with business strategy, systems thinking (ST) and asset management (AM), especially within critical infrastructure sectors like rail. This paper conducts a comprehensive literature review to assess existing
Carl Waring, Kapila Liyanage
wiley   +1 more source

Stacking X-Ray Observations of “Little Red Dots”: Implications for Their Active Galactic Nucleus Properties

The Astrophysical Journal Letters
Recent James Webb Space Telescope observations have revealed a population of compact extragalactic objects at z ≳ 4 with red near-infrared colors, which have been dubbed as “Little Red Dots” (LRDs).
Minghao Yue, Anna-Christina Eilers, Tonima Tasnim Ananna, Christos Panagiotou, Erin Kara, Takamitsu Miyaji   +5 more
doaj   +1 more source

Mechanistic Understanding of Laser‐Induced Defect Engineering of Anisotropic Cobalt Oxide Spinel Platelets in Water

ChemCatChem, EarlyView.
Pulsed laser defect engineering in liquid (PUDEL) modifies anisotropic Co3O4 platelets by inducing lattice distortions and defects while enriching {111} surfaces with hydroxyl groups and tunes the catalytic activity of the Co3O4 platelets in electrocatalytic oxygen evolution and thermocatalytic selective oxidation reactions.
Dana Schellenburg, Thomas Bihnam, Carsten Placke‐Yan, Georg Bendt, Oleg Prymak, Takuma Sato, Dylan Jennings, Catalina Leiva‐Leroy, Dongsheng Zhang, Milen Nachev, Kapil Dhaka, Falonne Nkou, Ulrich Hagemann, Markus Heidelmann, Stephane Kenmoe, Kai S. Exner, Bernd Sures, Martin Muhler, Christian H. Liebscher, Alexander Schnegg, Stephan Schulz, Stephan Barcikowski, Sven Reichenberger   +22 more
wiley   +1 more source

Variability in Active Galactic Nuclei [PDF]

International Astronomical Union Colloquium, 1993
AbstractAGN (Active Galactic Nuclei) have their profound time variability over a wide range of time scales. Although many results of AGN variability have been provided from wide band wavelength observations, I would like to concentrate the recent problems concerning a nearby region of their central engine based on the X-ray observations which are most ...
openaire   +2 more sources

Effect of Background Magnetic Field on Ion Weibel Instability With High‐Intensity Short‐Pulse Lasers

Contributions to Plasma Physics, EarlyView.
ABSTRACT The effect of finite background magnetic field on magnetic field amplification by Weibel instability using high‐intensity short‐pulse lasers is investigated. We consider Weibel instability for counter‐streaming sub‐relativistic plasma flows generated by shooting pure carbon targets with short‐pulse lasers.
Taiki Jikei, Takanobu Amano, Yosuke Matsumoto, Yasuhiro Kuramitsu   +3 more
wiley   +1 more source

The Hobby–Eberly Telescope Dark Energy Experiment Survey (HETDEX) Active Galactic Nuclei Catalog: The Fourth Data Release

The Astrophysical Journal Supplement Series
We present the active galactic nuclei (AGN) catalog from the fourth data release (HDR4) of the Hobby–Eberly Telescope Dark Energy Experiment Survey (HETDEX). HETDEX is an untargeted spectroscopic survey.
Chenxu Liu, Karl Gebhardt, Erin Mentuch Cooper, Dustin Davis, Donald P. Schneider, Matt J. Jarvis, Daniel J. Farrow, Steven L. Finkelstein, Óscar A. Chávez Ortiz, The HETDEX Collaboration   +9 more
doaj   +1 more source

Studies of active galactic nuclei with CTA

, 2012
In this paper, we review the prospects for studies of active galactic nuclei (AGN) using the envisioned future Cherenkov Telescope Array (CTA). This review focuses on jetted AGN, which constitute the vast majority of AGN detected at gamma-ray energies ...
A. Reimer, Abdo, Abdo, Abdo, Abdo, Abdo, Abdo, Abdo, Abdo, Abdo, Abdo, Acciari, Ackermann, Ackermann, Aharonian, Aharonian, Aharonian, Aharonian, Albert, Albert, Albert, Aleksic, Aleksic, Araudo, Atoyan, Baring, Barkov, Beall, Bednarek, Bednarek, Bednarek, Blandford, Blandford, Blażejowski, Bloom, Böttcher, Böttcher, Böttcher, Böttcher, Böttcher, Böttcher, Capetti, Cavaliere, Celotti, Chiaberge, Chiaberge, De Angelis, Dermer, Dermer, Dermer, Dermer, Dwek, Eichler, Ellison, Essey, Fanaroff, Finke, Fossati, Franceschini, Georganopoulos, Ghisellini, Ghisellini, Ghisellini, Giannios, Gilmore, Giommi, Kirk, Königl, Landt, Li, M. Böttcher, Mannheim, Maraschi, Marscher, Mücke, Mücke, Mücke, Ostrowski, Padovani, Pian, Pohl, Poutanen, Protheroe, Rau, Rawling, Reimer, Reimer, Reynoso, Romani, Roustazadeh, Roustazadeh, Sikora, Simet, Sitarek, Stawarz, Stecker, Stecker, Takahashi, Urry   +98 more
core   +1 more source

Adverse Outcome Pathways Applied to Space Radiation Research

Environmental and Molecular Mutagenesis, EarlyView.
ABSTRACT Long‐duration spaceflight exposes astronauts to various stressors that can alter human physiology, potentially causing immediate and long‐term health effects. These stressors can damage biomolecules, cells, tissues, and organs, leading to adverse outcomes.
Vinita Chauhan, Veronica S. Grybas, Devyn Hoopfer, Casey Higginson, Elizabeth A. Ainsbury, Omid Azimzadeh, Afshin Beheshti, Steve Blattnig, Marjan Boerma, Sylvain V. Costes, Stephen Doty, Christelle Adam‐Guillermin, Nobuyuki Hamada, Patricia Hinton, Janice L. Huff, Robert Reynolds, Ruth C. Wilkins, Scott Wood, Carole L. Yauk   +18 more
wiley   +1 more source