Results 21 to 30 of about 346 (113)

THE NEXT GENERATION ATLAS OF QUASAR SPECTRAL ENERGY DISTRIBUTIONS FROM RADIO TO X-RAYS [PDF]

The Astrophysical Journal Supplement Series, 2011
We have produced the next generation of quasar spectral energy distributions (SEDs), essentially updating the work of Elvis et al. (1994) by using high-quality data obtained with several space and ground-based telescopes, including NASA's Great Observatories.
Shang, Zhaohui, Brotherton, Michael S., Wills, Beverley J., Wills, D., Cales, Sabrina L., Dale, Daniel A., Green, Richard F., Runnoe, Jessie C., Nemmen, Rodrigo S., Gallagher, Sarah C., Ganguly, Rajib, Hines, Dean C., Kelly, Benjamin J., Kriss, Gerard A., Li, Jun, Tang, Baitian, Xie, Yanxia   +16 more
openaire   +3 more sources

Detecting quasars at very high redshift with next generation X-ray telescopes [PDF]

Monthly Notices of the Royal Astronomical Society, 2008
18 pages, 11 Figures. Version accepted to MNRAS; extra data plotted, XEUS and Con-X sensitivities corrected and predictions amended ...
Rhook, Kirsty J., Haehnelt, Martin G.
openaire   +2 more sources

Cosmic ray and TeV gamma ray generation by quasar remnants [PDF]

AIP Conference Proceedings, 2001
Results from new broadband (radio to X-ray) high-resolution imaging studies of the dormant quasar remnant cores of nearby giant elliptical galaxies are now shown to permit the harboring of compact dynamos capable of generating the highest energy cosmic ray particles and associated curvature radiation of TeV photons.
openaire   +1 more source

Modelling photometric reverberation mapping data for the next generation of big data surveys. Quasar accretion discs sizes with the LSST

Monthly Notices of the Royal Astronomical Society, 2023
ABSTRACT Photometric reverberation mapping can detect the radial extent of the accretion disc (AD) in Active Galactic Nuclei by measuring the time delays between light curves observed in different continuum bands. Quantifying the constraints on the efficiency and accuracy of the delay measurements is important for recovering the AD size ...
F Pozo Nuñez, C Bruckmann, S Deesamutara, B Czerny, S Panda, A P Lobban, G Pietrzyński, K L Polsterer   +7 more
openaire   +2 more sources

Principal Component‐Based Classification of Blazar Candidates of Uncertain Type in the 4FGL/LAT

Astronomische Nachrichten, EarlyView.
ABSTRACT We adopted principal component analysis (PCA), linear discriminant analysis (LDA), and support vector machines (SVM), to study classification for a sample of 2708 Fermi blazars: 1142 BL Lac objects (BLLs), 759 flat spectrum radio quasars (FSRQs), and 807 blazar candidates of uncertain type (BCUs).
Wen‐Xin Yang, Guo‐Hai Chen, Jing‐Tian Zhu, Hong‐Guang Wang, Denis Bastieri, Xu‐Hong Ye, Jing‐Chao Liang, De‐Xiang Wu, Jiang‐He Yang, Anton A. Strigachev, Rumen S. Bachev, Jun‐Jie Feng, Yi Liu, Jun‐Hui Fan   +13 more
wiley   +1 more source

psfgan: a generative adversarial network system for separating quasar point sources and host galaxy light [PDF]

Monthly Notices of the Royal Astronomical Society, 2018
ISSN:0035 ...
Dominic Stark, Barthelemy Launet, Kevin Schawinski, Ce Zhang, Michael Koss, M Dennis Turp, Lia F Sartori, Hantian Zhang, Yiru Chen, Anna K Weigel   +9 more
openaire   +6 more sources

Direct SMBH Formation Driven by Runaway Stellar Collisions in Globally Unstable Stellar Systems

Astronomische Nachrichten, EarlyView.
ABSTRACT The fueling problem addresses the ultimate fate of the reservoirs of gas and stars driven into the deepest gravitational potential wells of galaxies, thus it may contain the Universe's densest concentrations of gas and stars. This raises a key question: does the infalling material collapse directly into a supermassive black hole, or can it ...
Marcelo C. Vergara, Andrés Escala
wiley   +1 more source

The prognostic value of tumour budding for survival in stage II and III colorectal cancer: a systematic review and meta‐analysis

Histopathology, EarlyView.
This meta‐analysis demonstrates that high‐grade tumour budding is an independent prognostic factor in stage II–III colorectal cancer, associated with significantly worse disease‐free survival, overall survival and cancer‐specific survival. Aims Tumour budding (TB) has been recognized as an additional prognostic factor in the TNM (2017) and WHO (2019 ...
Yao Shu, Heng Zhang, Alessandro Lugli, Femke Simmer, Iris D. Nagtegaal   +4 more
wiley   +1 more source

Load Distributing Metamaterials Via Discrete Optimization

Advanced Functional Materials, Volume 36, Issue 82, 12 October 2026.
Mechanical metamaterials are computationally optimized to homogenize transmitted forces by minimizing the spread of reaction forces. The resulting architectures transform localized loading into broader, more uniform force distributions and experimentally demonstrate robust load spreading under quasi‐static and impact loading.
Andrea Detry, Hannes Holey, Raja Zulkarnain, Roberto Guerra, Ilaria Papa, Michael Zaiser, Stefano Zapperi   +6 more
wiley   +1 more source

Dynamic Regulation of Endogenous Transcription Factor Hubs at Single‐Molecule Resolution

Advanced Science, Volume 13, Issue 52, 18 September 2026.
This study combines single‐molecule microscopy and genome editing to characterize the dynamic behaviors of endogenous oncofusion transcription factor EWS::FLI1 in Ewing sarcoma cells. EWS::FLI1 forms neomorphic hubs that dynamically assemble and dissolve. The hubs are regulated during mitosis, by RNA, and by specific chemicals.
Shawn Yoshida, Yanghao Zhong, Akiko Kumagai, William G. Dunphy, Shasha Chong   +4 more
wiley   +1 more source