Results 51 to 60 of about 1,798,975 (310)

Reverberation Mapping and the Physics of Active Galactic Nuclei [PDF]

, 1997
Reverberation-mapping campaigns have revolutionized our understanding of AGN. They have allowed the direct determination of the broad-line region size, enabled mapping of the gas distribution around the central black hole, and are starting to resolve the
A Robinson, BM Peterson, BM Peterson, BM Peterson, BM Peterson, BM Peterson, BM Peterson, C Done, C Winge, C Winge, D Alloin, D Alloin, D Maoz, D Maoz, D Maoz, D Maoz, DM Crenshaw, E Pérez, FP Pijpers, GA Reichert, GJ Ferland, GM Stirpe, H Netzer, H Netzer, H Netzer, HL Marshall, I Wanders, I Wanders, I Wanders, J Clavel, JH Krolik, JH Krolik, K Horne, KT Korista, M Dietrich, M-H Ulrich, R Edelson, R Warwick, RD Blandford, RJ White, TE Carone, Th Boller, W Romanishin, W Welsh   +43 more
core   +2 more sources

Small-Scale X-ray Variability in the Cassiopeia A Supernova Remnant [PDF]

, 2006
A comparison of X-ray observations of the Cassiopeia A supernova remnant taken in 2000, 2002, and 2004 with the Chandra ACIS-S3 reveals the presence of several small scale features (
Daniel J. Patnaude, Douvion T., Robert A. Fesen, Vink J.   +3 more
core   +3 more sources

Study on tiered storage algorithm based on heat correlation of astronomical data

Frontiers in Astronomy and Space Sciences
With the surge in astronomical data volume, modern astronomical research faces significant challenges in data storage, processing, and access. The I/O bottleneck issue in astronomical data processing is particularly prominent, limiting the efficiency of ...
Xin-Chen Ye, Xin-Chen Ye, Xin-Chen Ye, Hai-Long Zhang, Hai-Long Zhang, Hai-Long Zhang, Hai-Long Zhang, Jie Wang, Jie Wang, Ya-Zhou Zhang, Ya-Zhou Zhang, Xu Du, Xu Du, Han Wu, Han Wu   +14 more
doaj   +1 more source

Wavelengths of the 3d6(5D)4s a6D - 3d6(5D)4p y6P Multiplet of Fe II (UV 8)

, 2011
We investigate the wavenumber scale of Fe I and Fe II lines using new spectra recorded with Fourier transform spectroscopy and using a re-analysis of archival spectra.
Aldenius, Aldenius, Bahcall, Batteiger, Chand, Craig J. Sansonetti, Dzuba, Emara, Gillian Nave, Griesmann, Hannemann, Johansson, Kaufman, Kaufman, Kramida, Learner, Learner, Maki, Murphy, Murphy, Nave, Nave, Nave, Norlén, Pickering, Pickering, Salit, Salumbides, Sansonetti, Thorne, Whaling   +30 more
core   +1 more source

Nanoscale Mapping of Plasmonic Charge Transport in Nano‐Resonators Based on Resistive Switching Materials

Advanced Functional Materials, EarlyView.
In this strategy, a conductive nano‐probe is employed to induce nanoscale phase transitions and map the nanoscale conductivity and trap density of GST films. By utilizing the contrasting properties of phase‐change states, nano‐resonators are fabricated that exhibit plasmonic conduction and dramatically different transport characteristics.
Sunwoo Bang, Seunghyo Park, Shashank Shekhar, Yuhyeon Oh, Seunghun Hong   +4 more
wiley   +1 more source

Fundamental Constant Observational Bounds on the Variability of the QCD Scale

, 2017
Many physical theories beyond the Standard Model predict time variations of basic physics parameters. Direct measurement of the time variations of these parameters is very difficult or impossible to achieve.
Thompson, Rodger I.
core   +1 more source

Interactive Visualization of the Largest Radioastronomy Cubes

, 2010
3D visualization is an important data analysis and knowledge discovery tool, however, interactive visualization of large 3D astronomical datasets poses a challenge for many existing data visualization packages.
A.H. Hassan, Barnes, Becciani, Beeson, C.J. Fluke, D.G. Barnes, Drebin, Goel, Graham, Hamada, Lacroute, Levoy, Li, Lombeyda, McClure-Griffiths, Oosterloo, Pence, Sabella, Samet, Schive, Thibault, Wayth   +21 more
core   +1 more source

The Bolocam Galactic Plane Survey: Survey Description and Data Reduction [PDF]

, 2010
We present the Bolocam Galactic Plane Survey (BGPS), a 1.1 mm continuum survey at 33" effective resolution of 170 square degrees of the Galactic Plane visible from the northern hemisphere. The survey is contiguous over the range -10.5 < l < 90.5, |b| < 0.
Adam G. Ginsburg, Bally, Battersby, Beuther, Cara Battersby, Carey, Chapin, Claudia Cyganowski, Cotton, Cyganowski, Dame, Darren Dowell, Di Francesco, Di Francesco, Dunham, Egan, Enoch, Enoch, Enoch, Eric Todd Bradley, Erik Rosolowsky, Evans, Guy S. Stringfellow, Jackson, James E. Aguirre, Jason Glenn, John Bally, Johnstone, Johnstone, Jonathan P. Williams, Josh Walawender, Laurent, Matthews, Meredith M. Drosback, Miranda K. Dunham, Mueller, Neal J. Evans, Netterfield, Nummelin, Olmi, Ossenkopf, Paul Harvey, Pohl, Rathborne, Rathborne, Reid, Rosolowsky, Roy, Sayers, Sayers, Simon, Simon, Stark, Stil, Testi, Williams, Young   +56 more
core   +4 more sources

Infrared Nanocrystals for Space Application: Hardness to Irradiations

Advanced Functional Materials, EarlyView.
This article investigates infrared HgTe nanocrystals under X‐ray and ion irradiation, revealing remarkable radiation hardness. It uncovers distinct degradation mechanisms and shows that the nanomaterial outperforms integrated electronics. The results position colloidal nanocrystals as promising candidates for resilient space and harsh‐environment ...
Alexandre Neyret, Dario Mastrippolito, Bingbing Xia, Adrien Khalili, Maxime Lebreton, Giorgia Strobbia, Albin Colle, Marco Paye, Mariarosa Cavallo, Erwan Bossavit, Claire Abadie, Yoann Prado, Debora Pierucci, Victor Parahyba, Francois Coursaget, David Darson, Emrick Briand, Ian Vickridge, Stephane Demiguel, Sebastien Massenot, Jean‐Marc Belloir, Vincent Goiffon, Emmanuel Lhuillier   +22 more
wiley   +1 more source

Cyclostratigraphy and paleoclimate analysis of the Lingshui Formation in Changchang Sag, Qiongdongnan Basin, China

Energy Geoscience
The Qiongdongnan Basin, located in the sea between Hainan Island and the Xisha Islands, is a faulted Cenozoic basin on the northern continental margin of the South China Sea.
Haizhang Yang, Wu Tang, Enze Xu, Shangfeng Zhang, Yaning Wang, Min Xu   +5 more
doaj   +1 more source