Results 51 to 60 of about 3,447,628 (240)

The properties of discrete X-ray sources in star-forming galaxies [PDF]

, 2012
Observations of starburst galaxies have revealed a large number of point-like X-ray sources located within these systems, including active galactic nuclei (AGN), X-ray binaries (XRBs), and utraluminous X-ray sources (ULXs).
JACKSON, FLOYD,EMMANUEL
core  

NuSTAR Observation of the TeV-detected Radio Galaxy 3C 264: Core Emission and the Hot Accretion Flow Contribution

The Astrophysical Journal
3C 264 is one of the few FRI radio galaxies with detected TeV emission. It is a low-luminosity active galactic nucleus (LLAGN) and is generally associated with a radiatively inefficient accretion flow (RIAF).
Ka-Wah Wong, Colin M. Steiner, Allison M. Blum, Dacheng Lin, Rodrigo Nemmen, Jimmy A. Irwin, Daniel R. Wik   +6 more
doaj   +1 more source

An accessible microfluidic perfusion platform for time‐restricted control of zebrafish embryonic patterning

Developmental Dynamics, EarlyView.
Abstract Understanding the dynamic nature of developmental networks requires live imaging techniques capable of capturing real‐time developmental processes in wild‐type and mutant embryos as they are exposed to pharmacological perturbations. A peculiar developmental patterning process in early vertebrate embryos is the sequential segmentation of ...
Mohammed Nakhuda, M. Fethullah Simsek
wiley   +1 more source

Searching for active galactic nuclei among unidentified INTEGRAL Sources [PDF]

, 2011
We report on a new method to identify active galactic nuclei (AGNs) among unidentified INTEGRAL sources. This method consists of cross-correlating unidentified sources listed in the fourth Imager on Board the INTEGRAL Satellite (IBIS) Survey Catalogue ...
Vahram Chavushyan
core  

Time-evolving Diagnostic of the Ionized Absorbers in NGC 4051. I. High-resolution Time-averaged Spectroscopy

The Astrophysical Journal
We present a high-resolution X-ray spectroscopic study of the narrow-line Seyfert 1 galaxy NGC 4051 using two XMM-Newton high-resolution Reflection Grating Spectrometer observations.
Roberto Serafinelli, Fabrizio Nicastro, Alfredo Luminari, Yair Krongold, Francesco Camilloni, Elias Kammoun, Riccardo Middei, Enrico Piconcelli, Luigi Piro   +8 more
doaj   +1 more source

Active Galactic Nuclei

, 2022
Introduction into AGN given at SSAASS with focus on radio features of ...
openaire   +6 more sources

XRISM/Resolve Reveals the Complex Iron Structure of NGC 7213: Evidence for Radial Stratification between Inner Disk and Broad-line Region

The Astrophysical Journal Letters
We present the first high-resolution X-ray spectrum of NGC 7213 obtained with XRISM/Resolve, supported by simultaneous XMM-Newton, NuSTAR, and SOAR optical data.
E. Kammoun, T. Kawamuro, K. Murakami, S. Bianchi, F. Nicastro, A. Luminari, E. Aydi, M. Eracleous, O. K. Adegoke, E. Bertola, P. G. Boorman, V. Braito, G. Bruni, A. Comastri, P. Condò, M. Dadina, T. Enoto, J. A. García, V. E. Gianolli, F. A. Harrison, G. Lanzuisi, M. Laurenti, A. Marinucci, G. Mastroserio, H. Matsumoto, G. Matt, G. Matzeu, R. Middei, E. Nardini, H. Noda, H. Odaka, S. Ogawa, F. Panessa, E. Piconcelli, C. Pinto, J. M. Piotrowska, G. Ponti, C. Ricci, R. Ricci, R. Serafinelli, F. Shi, D. Stern, A. Tanimoto, Y. Terashima, R. Tomaru, F. Tombesi, A. Tortosa, Y. Ueda, F. Ursini, C. Vignali, S. Yamada, S. Yamada   +51 more
doaj   +1 more source

Impact of fragmented urbanization on observed precipitation

Quarterly Journal of the Royal Meteorological Society, EarlyView.
This study investigates the impact of fragmented urban landscapes on downwind precipitation by applying an innovative observation‐centered approach to an extensive rain gauge network in Belgium. The approach classifies the observations based on the upwind urban land cover fraction, and compares precipitation indices between rural‐ and urban‐labeled ...
Amber Jacobs, Kwinten Van Weverberg, Steven Caluwaerts   +2 more
wiley   +1 more source

Revisiting the X-Ray Variability Plane of Active Galactic Nuclei: The Significant Role of the Photon Index

The Astrophysical Journal
X-ray variability provides a powerful probe of the innermost regions of active galactic nuclei (AGNs), offering valuable insights into the accretion process and the structure of the corona.
Ruisong Xia, Hao Liu, Yongquan Xue, Jialai Wang, Guowei Ren, Mouyuan Sun, Shifu Zhu, Mengqiu Huang, Qingwen Wu, Xian-Liang Lu, Zhen-Bo Su, Shuying Zhou   +11 more
doaj   +1 more source

Towards Sustainable Energy‐Saving Hydrogen Production: Recent Advances in Tungsten‐Based Urea Oxidation Electrocatalysts

Small, EarlyView.
This work presents tungsten‐modified nickel‐based catalysts for the urea oxidation reaction, highlighting strategies to boost catalytic performance. It focuses on tuning electronic structure, enriching accessible active sites, and designing advanced catalyst structures, providing guidance for the rational development of high‐performance UOR catalysts ...
Yi Zeng, Shun Lu, Yuan Wang, Saddick Donkor, Donna Cairns, Xingqun Zheng, Qingsong Hua, Ben Bin Xu   +7 more
wiley   +1 more source