Results 41 to 50 of about 69 (69)

The ratio of X-ray-to-optical luminosity for active galactic nuclei [PDF]

Monthly Notices of the Royal Astronomical Society, 1984
On montre que le renforcement apparent du rapport moyen des luminosites RX a optique des noyaux de Seyfert 1, en comparaison avec les QSO radio calmes, peut etre largement, sinon totalement, du a un rougissement interne.
CHENG FZ, Danese, Luigi, DEZOTTI G, LUCCHIN F.   +3 more
openaire   +3 more sources

Timing of Dike and Sill Emplacement in the Inner Aureole of the Alta Stock, Utah Determined by Zircon and Monazite Petrochronology

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 5, May 2025.
Abstract Detailed geochronology from two compositionally distinct generations of dikes and sills intruded into the Alta metamorphic aureole, north‐central Utah, complement previous geochronologic studies from the Alta stock, providing information on the timing of magmatism and the nature of emplacement.
C. J. Beno, M. A. Stearns, J. R. Bowman, J. M. Bartley, D. P. Fernandez, A. R. C. Kylander‐Clark   +5 more
wiley   +1 more source

X-ray power law spectra in active galactic nuclei [PDF]

Astronomy and Astrophysics, 2010
6 pages, 1 figure, Astronomy and Astrophysics ...
T. J. L. Courvoisier, W. Ishibashi
openaire   +3 more sources

Evolving Fluid Source During the Growth of a Trench‐Parallel Seismogenic Fault System

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 5, May 2025.
Abstract Fluid infiltration along seismically‐active faults and fluid‐rock interaction influence the mechanical behavior of faults. Nevertheless, how fluid infiltration and fluid‐rock interactions evolve at seismogenic depths with fault slip accumulation remain poorly constrained in the geological record.
Simone Masoch, Luigi Dallai, Rodrigo Gomila, Michele Fondriest, Davide Novella, Giorgio Pennacchioni, José Cembrano, Giulio Di Toro   +7 more
wiley   +1 more source

Melt‐Supported Strain Localization at Eclogite‐Facies Conditions Triggered by Syn‐Metamorphic Strength Inversion

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 5, May 2025.
Abstract In convergent high‐pressure settings dominated by dry mafic rocks, strain has been proposed to be predominantly localized in eclogite. However, the processes initiating strain localization, accommodating strain and rheological consequences remain to be identified.
Anna Rogowitz, Simon Schorn, Benjamin Huet, Bernhard Grasemann, Luca Menegon   +4 more
wiley   +1 more source

4D Biofabrication of Magnetically Augmented Callus Assembloid Implants Enables Rapid Endochondral Ossification via Activation of Mechanosensitive Pathways

Advanced Science, Volume 12, Issue 15, April 17, 2025.
Magnetically augmented biohybrid cartilaginous microtissues enable remote microtissue motion control and assembly as well as targeted differentiation. This study demonstrates accelerated endochondral ossification under magnetic stimulation, highlighting cartilaginous assembloid constructs’ ability to retain long‐term magnetic properties.
Konstantinos Ioannidis, Andreas Dimopoulos, Isaak Decoene, Maya Guilliams, Hanna Svitina, Liudmyla Storozhuk, Rodrigo de Oliveira‐Silva, Sergey Basov, Nguyen Thi Kim Thanh, Stefanos Mourdikoudis, Margriet J. Van Bael, Bart Smeets, Dimitrios Sakellariou, Ioannis Papantoniou   +13 more
wiley   +1 more source

Correlation of Band Bending and Ionic Losses in 1.68 eV Wide Band Gap Perovskite Solar Cells

Advanced Energy Materials, Volume 15, Issue 16, April 22, 2025.
Piperazinium salt treatments with different anions (chloride, iodide, tosylate, and bistriflimide) influence the energetics, carrier dynamics and long‐term stability of 1.68 eV perovskite solar cells. Chloride treatments achieve the highest efficiency (21.5%) but suffer from fast degradation due to ionic losses.
Florian Scheler, Silvia Mariotti, Daniele Mantione, Sahil Shah, Dorothee Menzel, Hans Köbler, Maxim Simmonds, Thomas W. Gries, Jona Kurpiers, Viktor Škorjanc, Jinzhao Li, Amran Al‐Ashouri, Philipp Wagner, Steven P. Harvey, Fengjiu Yang, Marin Rusu, Thomas Unold, Bernd Stannowski, Kai Zhu, Felix Lang, Dieter Neher, Eva Unger, Antonio Abate, David Mecerreyes, Martin Stolterfoht, Eike Köhnen, Lars Korte, Marko Topič, Steve Albrecht   +28 more
wiley   +1 more source

Garnet as a Proxy for Deciphering Polymetamorphic Histories: An Example From the Sanandaj‐Sirjan Zone of Iran

Geological Journal, Volume 60, Issue 4, Page 793-806, April 2025.
This work documents how the texture and composition of metamorphic garnet represent a valuable petrological archive capable of deciphering complex thermobaric histories. ABSTRACT In the central sector of the Sanandaj‐Sirjan zone of Iran, the Triassic‐to‐Jurassic ‘Hamedan Phyllites’ metamorphic complex shows a polymetamorphic evolution characterised by ...
Mirmohammad Miri, Federico Lucci, Ali A. Sepahi, Mohammad Maanijou, John Charles White   +4 more
wiley   +1 more source

In vivo dosimetry for proton therapy: A Monte Carlo study of the Gadolinium spectral response throughout the course of treatment

Medical Physics, Volume 52, Issue 4, Page 2412-2424, April 2025.
Abstract Background In proton radiotherapy, the steep dose deposition profile near the end of the proton's track, the Bragg peak, ensures a more conformed deposition of dose to the tumor region when compared with conventional radiotherapy while reducing the probability of normal tissue complications.
Mariana Brás, Hugo Freitas, Patrícia Gonçalves, João Seco   +3 more
wiley   +1 more source

Active galactic nuclei with ultrasoft X-ray emission

The Astrophysical Journal Supplement Series, 1992
The discovery of a class of AGN with clearly distinguishable soft X-ray components below 0.5 keV is reported. These AGN were detected through equivalent hydrogen column densities that are less than a few times 10 exp 20/sq cm. At least three kinds of AGN comprise this sample: low-redshift quasars and Seyfert galaxies that have only ultrasoft emission ...
E. M. Puchnarewicz, R. J. Thompson, Keith O. Mason, J. Kartje, F. A. Cordova, F. R. Harnden   +5 more
openaire   +2 more sources