Results 81 to 90 of about 50,755 (263)

The hard X-ray view of bright infrared galaxies

, 2009
Aims. The synthesis of the cosmic X-ray background (CXB) requires a large population of Compton-thick active galactic nuclei that have not been detected so far.
Akylas, Armus, Barger, Bassani, Courvoisier, Dadina, de Rosa, Franceschini, Genzel, Gilli, Gondoin, González-Martín, Grimm, Guainazzi, Kawakatu, Kennicutt, La Franca, Lebrun, Lynden-Bell, Matt, Mushotzky, N. Cabral, Paltani, R. Walter, Risaliti, Risaliti, Sanders, Schmidt, Setti, Terashima, Tozzi, Tueller, Ubertini, Vega, Vignati, Walter, Watabe, Wilkes, Wilkes, Zdziarski   +39 more
core   +1 more source

Radiation pressure acceleration by X-rays in active galactic nuclei [PDF]

Monthly Notices of the Royal Astronomical Society, 2001
We present calculations of the dynamics of highly ionized gas clouds that are confined by external pressure, and are ionized by AGN continuum. We focus on the gas that is seen in absorption in the X-ray spectrum of many AGN and show that such gas can reach hydrostatic equilibrium under various conditions. The principal conclusion is that the clouds can
Chelouche, Doron, Netzer, Hagai
openaire   +2 more sources

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

ChemCatChem, Volume 18, Issue 1, 15 January 2026.
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

The Role of Environment in Triggering Active Galactic Nuclei—Evidence for a Change at z ∼ 1

The Astrophysical Journal
What triggers active galactic nuclei (AGN) in some galaxies and what role this brief period of activity plays in the overall evolution of galaxies are still open questions. This paper explores whether or not the local, on scales of ≈1 Mpc, galaxy density
Jason R. Reeves, Anna Sajina, Henry Adair, Duncan Farrah, Mark Lacy   +4 more
doaj   +1 more source

INTEGRAL/IBIS 7-year All-Sky Hard X-Ray Survey. Part II: Catalog of Sources

, 2010
This paper is the second in a series devoted to the hard X-ray (17-60 keV) whole sky survey performed by the INTEGRAL observatory over seven years. Here we present a catalog of detected sources which includes 521 objects, 449 of which exceed a 5 sigma ...
Abdo, Ajello, Aleksandrovich, Altamirano, Augello, Barlow, Barlow, Barthelmy, Bassa, Bassani, Bassani, Bassani, Bassani, Bazzano, Beckmann, Beckmann, Bikmaev, Bikmaev, Bikmaev, Bikmaev, Bird, Bird, Bird, Bird, Bodaghee, Brandt, Brandt, Brandt, Brandt, Brunschweiger, Burenin, Burenin, Burenin, Burenin, Burenin, Butler, Butters, Bykov, Bykov, Bélanger, Cackett, Cadol le Bel, Chaty, Chelovekov, Chelovekov, Chelovekov, Chelovekov, Chernyakova, Chernyakova, Chernyakova, Cornelisse, Courvoisier, Crawford, Cusumano, Dean, Den Hartog, den Hartog, den Hartog, Donato, E. Churazov, Enya, Fiocchi, Fisher, Galloway, Gehrels, Gotz, Grebenev, Grebenev, Grebenev, Grebenev, Grebenev, Grebenev, Grebenev, Grebenev, Grebenev, Grebenev, Grebenev, Grebenev, Grebenev, Grebenev, Grebenev, Gros, Gänsicke, Halpern, Hannikainen, Im, in ’t Zand, in ’t Zand, Jauncey, Karasev, Karasev, Keek, Kniazev, Kniazev, Kretschmar, Krivonos, Krivonos, Krivonos, Krivonos, Krivonos, Krivonos, Kuiper, Kuiper, Kuiper, Kuiper, Kuulkers, Kuulkers, Landi, Landi, Landi, Landi, Leyder, Liu, Liu, Lubinski, Lutovinov, Lutovinov, Lutovinov, Lutovinov, Lutovinov, Lutovinov, Lutovinov, Lutovinov, Lutovinov, Lutovinov, Lutovinov, M. Revnivtsev, Malizia, Malizia, Markwardt, Markwardt, Masetti, Masetti, Masetti, Masetti, Masetti, Masetti, Masetti, Masetti, Masetti, Masetti, Masetti, Masetti, Masetti, Masetti, Masetti, Mescheryakov, Molkov, Molkov, Molkov, Morelli, Negueruela, Negueruela, Nespoli, Paizis, Palmer, Parisi, Patel, Pavlinskii, Potter, Produit, R. Krivonos, R. Sunyaev, Ratti, Rea, Reig, Reig, Renaud, Revnivtsev, Revnivtsev, Revnivtsev, Revnivtsev, Revnivtsev, Revnivtsev, Revnivtsev, Revnivtsev, Revnivtsev, Revnivtsev, Rodriguez, Rodriguez, Rodriguez, Rodriguez, Rodriguez, S. Grebenev, S. Tsygankov, Sazonov, Sazonov, Sazonov, Sguera, Sguera, Sidoli, Smith, Soldi, Soldi, Steeghs, Sunyaev, Sunyaev, Sunyaev, Terrier, Tomsick, Tomsick, Tomsick, Tomsick, Tomsick, Tomsick, Torrejón, Torres, Torres, Tueller, Tueller, Turler, Ubertini, Ubertini, Walter, Walter, Watson, Wijnands, Winkler, Winter, Zhou, Zurita Heras   +220 more
core   +1 more source

Formation of Asteroid (16) Psyche by a Giant Impact

Journal of Geophysical Research: Planets, Volume 131, Issue 1, January 2026.
Abstract Asteroid (16) Psyche is the largest likely metal‐rich asteroid in the Solar System and the target of the NASA Psyche mission. The mission aims to determine whether the asteroid is the core of a differentiated planetesimal that lost its mantle via a giant impact.
Saverio Cambioni, Benjamin P. Weiss, Namya Baijal, Robert Melikyan, Erik Asphaug, John B. Biersteker, Richard P. Binzel, William F. Bottke, Samuel W. Courville, Linda T. Elkins‐Tanton, David J. Lawrence, José M. G. Merayo, Carol A. Raymond, Mark A. Wieczorek, Maria T. Zuber   +14 more
wiley   +1 more source

Test for Echo: X-Ray Reflection Variability in the Seyfert-2 Active Galactic Nucleus NGC 4388

The Astrophysical Journal
We report on a study of the narrow Fe K α line and reflection spectrum in the well-known Seyfert-2 active galactic nucleus (AGN), NGC 4388. X-ray spectra summed from two extensive NICER monitoring campaigns, separated by years, show strong evidence of ...
Ben Gediman, Jon M. Miller, Abderahmen Zoghbi, Paul Draghis, Zaven Arzoumanian, W. N. Brandt, Keith Gendreau   +6 more
doaj   +1 more source

Deep Extragalactic X-ray Surveys [PDF]

, 2005
Deep surveys of the cosmic X-ray background are reviewed in the context of observational progress enabled by the Chandra X-ray Observatory and the X-ray Multi-Mirror Mission-Newton.
Brandt WN, Brandt WN, Comastri A, Comastri A, Ferrarese L, G. Hasinger, Hasinger G, Hasinger G, Hasinger G, Mainieri V, Miyaji T, Osmer PS, Schmidt M, W.N. Brandt, Zamorani G   +14 more
core   +1 more source

Forecasting SEP Atmospheric and Space Radiation by Coupling UMASEP and NAIRAS Models

Space Weather, Volume 24, Issue 1, January 2026.
Abstract The Nowcast of Aerospace Ionizing RAdiation System (NAIRAS) model predicts the radiation environment from the Earth's surface to free‐space. The model output provides dosimetric and particle flux quantities required to assess the hazardous radiation impacts to human health and adverse effects on vehicle electronic systems.
Christopher J. Mertens, Guillaume P. Gronoff, Daniel B. Phoenix, Marlon Núñez, Yihua Zheng   +4 more
wiley   +1 more source

Subgrain and Cavity Development during Creep of Al‐3.85%Mg

Advanced Engineering Materials, Volume 27, Issue 23, December 2025.
Al‐3.85%Mg does form subgrains if crept at very high strains. This fact allows the unification of the creep description in two different alloys such as pure Al and Al–Mg alloys. It is classically considered that the creep mechanisms for type M (e.g., pure Al) and type A alloys (e.g., Al–Mg alloys) are different.
Augusta Isaac, Itziar Serrano‐Munoz, Aleksander Kostka, Martinus Putra Widjaja, Gaspar González‐Doncel, Giovanni Bruno, Ricardo Fernández   +6 more
wiley   +1 more source