Results 41 to 50 of about 2,827,182 (371)

The Full Spectrum Galactic Terrarium: MHz to TeV Observations of Various Critters [PDF]

, 2008
Multi-wavelength studies at radio, infrared, optical, X-ray, and TeV wavelengths have discovered probable counterparts to many Galactic sources of GeV emission detected by EGRET.
A. Djannati-Atai, A. Weinstein, C. Brogan, E. D. Grundstrom, E. de Oña Wilhelmi, Felix A. Aharonian, Frank Rieger, G. G. Pooley, J. W. T. Hessels, K. S. Wood, M. Lyutikov, M. V. McSwain, Mallory S. E. Roberts, P. S. Ray, R. Terrier, S. Johnston, S. M. Dougherty, S. Ransom, Werner Hofmann   +18 more
core   +4 more sources

Reverberation mapping of active galactic nuclei: From X-ray corona to dusty torus

iScience, 2021
Summary: The central engines of active galactic nuclei (AGNs) are powered by accreting supermassive black holes, and while AGNs are known to play an important role in galaxy evolution, the key physical processes occur on scales that are too small to be ...
Edward M. Cackett, Misty C. Bentz, Erin Kara   +2 more
doaj   +1 more source

Impact of supermassive black hole growth on star formation

, 2017
Supermassive black holes are found at the centre of massive galaxies. During the growth of these black holes they light up to become visible as active galactic nuclei (AGN) and release extraordinary amounts of energy across the electromagnetic spectrum ...
Harrison, C. M.
core   +1 more source

Sky surveys and deep fields of ground-based and space telescopes

, 2006
Selected results obtained in major observational sky surveys (DSS, 2MASS, 2dF, SDSS) and deep field observations (HDF, GOODS, HUDF, etc.) are reviewed.
Reshetnikov, V. P.
core   +2 more sources

Unique Performance Considerations for Printable Organic Semiconductor and Perovskite Radiation Detectors: Toward Consensus on Best Practice Evaluation

Advanced Functional Materials, EarlyView.
A lack of standard approaches for testing and reporting the performance of metal halide perovskites and organic semiconductor radiation detectors has resulted in inconsistent interpretation of performance parameters, impeding progress in the field. This Perspective recommends key metrics and experimental details, which are suggested for reporting in ...
Jessie A. Posar, Matthew Large, Andrea Ciavatti, Laura Basiricò, Beatrice Fraboni, Paul J. Sellin, Attila J. Mozer, Marco Petasecca, Matthew J. Griffith   +8 more
wiley   +1 more source

The Ongoing Decline in Activity of Comet 103P/Hartley 2

The Planetary Science Journal
We report photometric observations of Comet 103P/Hartley 2 during its 2023 apparition. Our campaign, conducted from August through 2023 December, combined data from a global network of citizen astronomers coordinated by Unistellar and the Association ...
Ariel Graykowski, Guillaume Langin, David Chiron, Bruno Guillet, Franck Marchis, Nicolas Biver, Gérard Arlic, Bernard Baudouin, Etienne Bertrand, Randall Blake, Cyrille Bosquet, John K. Bradley, Isabelle Brocard, Christophe Cac, Alain Cagna, Nicolas Castel, Eric Chariot, Olivier Clerget, Tom Coarrase, Lucas Cogniaux, Julien Collot, Christophe Coté, Michel Deconinck, Jean-Paul Desgrees, Josselin Desmars, Giuseppe Di Tommaso, José Donas, William Drapeaud, Todd Forrester, Florent Fremont, Keiichi Fukui, Paul Garde, Jérôme Gaudilliere, Pascal Gaudin, Alexis Giacomoni, David Gineste, Patrice Girard, Jean Claude Gomez, Chuck Goodman, Gerard-Philippe Grandjean, Philippe Guiglion, David Havell, Patrick Huth, Kachi Iwai, Marc-Etienne Julien, Rachel Knight, Ryuichi Kukita, Petri Kuossari, Jean-Michel Ladruze, Anis Ben Lassoued, Cédric Latgé, Jean-Marie Laugier, Matthieu Lauvernier, Patrice Le Guen, Jean-Charles Le Tarnec, Didier Lefoulon, Liouba Leroux, Niniane Leroux, Arnaud Leroy, Chelsey Logan, Yohann Lorand, Elisabeth Maris, Jean-Pierre Masini, Nicola Meneghelli, Laurent Millart, Eric Miny, Mike Mitchell, Baptiste Montoya, Fabrice Mortecrette, Anouchka Nardi, Antoine Ngo, Denis Nicolas, Raphael Nicollerat, Takaya Okada, Wataru Ono, George Patatoukas, Jacqueline Payet-Ayrault, Patrick Picard, Claude Porchel, Kanai Potts, Michel Quienen, Martial Relier, Fabien Richardot, Darren Rivett, Matthew Ryno, Fadi Saibi, Sophie Saibi, Christian Sartini, Hiromichi Sasaki, Philippe Seibert, Masao Shimizu, Lucas Sifoni, Georges Simard, Petri Tikkanen, Ian Transom, Bernard Tregon, Frank Tyrlik, Laurent Vadrot, Michel Veuillet, Christian Voirol, Stefan Will, Corine Yahia, Phil Yehle, Neil Yoblonsky, Wai-Chun Yue   +104 more
doaj   +1 more source

Editorial to the Special Issue: “High-Energy Gamma-Ray Astronomy: Results on Fundamental Questions after 30 Years of Ground-Based Observations”

Universe, 2022
Gamma-ray astronomy is the observational science that studies the cosmos in the last unexplored electromagnetic window, namely, above the megaelectronvolt (EeV = 106 eV) (MeV) [...]
Ulisses Barres de Almeida, Michele Doro
doaj   +1 more source

Fractional Skyrmion Tubes in Chiral‐Interfaced 3D Magnetic Nanowires

Advanced Functional Materials, EarlyView.
In chiral 3D helical magnetic nanowires, the coupling between the geometric and magnetic chirality provides a way to create topological spin states like vortex tubes. Here, it is demonstrated how the breaking of this coupling in interfaced 3D nanowires of opposite chirality leads to even more complex topological spin states, such as fractional ...
John Fullerton, Naëmi Leo, Jakub Jurczyk, Claire Donnelly, Dédalo Sanz‐Hernández, Luka Skoric, Nicholas Mille, Stefan Stanescu, Donald A MacLaren, Rachid Belkhou, Aurelio Hierro‐Rodriguez, Amalio Fernández‐Pacheco   +11 more
wiley   +1 more source

The GMRT High Resolution Southern Sky Survey for Pulsars and Transients. VI. Discovery of Nulling, Localization, and Timing of PSR J1244–4708

The Astrophysical Journal, 2023
Many pulsars in the known population exhibit nulling, which is characterized by a sudden cessation and subsequent restoration of radio emission. In this work, we present the localization, timing, and emission properties of a pulsar discovered by the GMRT
S. Singh, J. Roy, Shyam S. Sharma, B. Bhattacharyya, S. Kudale   +4 more
doaj   +1 more source

Statistically Stable Estimates of Variance in Radioastronomical Observations as Tools for RFI Mitigation

, 2010
A selection of statistically stable (robust) algorithms for data variance calculating has been made. Their properties have been analyzed via computer simulation.
Baan, Barnbaum, Briggs, David, Fisher, Hampel, Hettmansbperger, Huber, Kendal, Kesteven, Mitchell, P. A. Fridman, Poulsen, Rohlfs, Sheskin, Shurygin, Thompson, Thompson, Tukey, van der Waerden, Wilcox, Zhang   +21 more
core   +1 more source