Results 81 to 90 of about 3,447,628 (240)
Origin of radio emission from nearby low-luminosity active galactic nuclei
, 2005 We use the observational data in radio, optical, and X-ray wave bands for a sample of active galactic nuclei (AGNs) with measured black hole masses to explore the origin of radio emission from nearby low-luminosity active galactic nuclei (LLAGNs).
Wu, QW, Cao, XW
core
, 2007 The transition of a standard thin disc to a radiatively inefficient accretion flow (RIAF) is expected to occur when m similar to m(crit)(m =. M/M-Edd).
Xu, Ya-Di, Cao, Xinwu
core +1 more source
, 2010 This work represents the final year project for BSc Physics with Astrophysics degree and it mainly focuses on empirical investigation of the photometry of quasars in the Sloan Digital Sky Survey (SDSS) and the UK Infrared Telescope (UKIRT) Infrared Sky Survey (UKIDSS) systems.
openaire +3 more sources
XRISM Discovery of Multiple Ionized Fe-K Emission and Absorption Components in Centaurus A
The Astrophysical JournalWe present the first clear detection of ionized Fe-K emission and absorption components in the nearby radio galaxy Centaurus A, revealed by the high-resolution XRISM/Resolve detector.
Taishu Kayanoki +15 more
doaj +1 more source
Challenges and Opportunities for Layered Double Perovskite Solar Cells
Solar RRL, Volume 10, Issue 17, 15 September 2026.Layered lead‐free double perovskites suffer from intrinsic and extrinsic limitations that hinder high photovoltaic performance. This review identifies key challenges, including unfavorable band structures, strong self‐trapping, defect‐induced recombination, processing‐induced inhomogeneity, and device‐level mismatches.
Krishnaiah Mokurala +4 more
wiley +1 more source
Supplementary material to DESI's publication "Beyond Traditional Diagnostics: Identifying Active Galactic Nuclei with Spectral Energy Distribution Fitting in DESI Data" to comply with the data management plan.
Siudek, Malgorzata
core +1 more source
Mid-infrared spectroscopy of candidate active galactic nuclei-dominated submillimeter galaxies [PDF]
, 2010 Spitzer spectroscopy has revealed that ≃80% of submm galaxies (SMGs) are starburst (SB)-dominated in the mid-infrared. Here we focus on the remaining ≃20% that show signs of harboring powerful active galactic nuclei (AGNs).
David Hughes
core
Reducing the Dimensions of Active Galactic Nuclei Light-curve Manifolds
The Astrophysical JournalThe active galactic nuclei (AGNs) glossary is vast and complex. Depending on the selection method, observing wavelength, and brightness, AGNs are assigned distinct labels, yet the relationship between different selection methods and the diversity of time-
Shoubaneh Hemmati +12 more
doaj +1 more source
Defects Induced Instability of Perovskite Solar Cells
Advanced Energy and Sustainability Research, Volume 7, Issue 9, September 2026.Defect passivation and grain‐size engineering in perovskite films are achieved through precursor additives, antisolvent additives, interfacial modification, light treatment, surface polishing, and temperature treatment. The synergistic effects suppress defect states and enhance film quality, providing insights into effective strategies for improving ...
Davoud Dastan +13 more
wiley +1 more source
The Changing-look Phenomenon Accompanied by an Accretion Mode Transition in NGC 3786
The Astrophysical JournalTo reveal the physical origin of the changing-look (CL) phenomenon in NGC 3786, which transitioned from type 1.8/1.9 to type 1, we present an analysis of long-term spectral monitoring in the optical and near-infrared obtained with Gemini/GMOS-N and ...
Suyeon Son +4 more
doaj +1 more source