Results 51 to 60 of about 4,173,094 (217)

Serching for AGNs with VST: optical variability in the COSMOS and CDFS regions

, 2016
Active Galactic Nuclei (AGN) are characterised by strong variability at all wavelengths. We exploited 3 years of VST monitoring observations of the COSMOS and CDFS regions, performed within the SUDARE/VOICE surveys, to assemble a sample of AGN candidates
Falocco, S. (5201278), Poulain, M. (5201260), VST-SUDARE/VOICE team, Poulain, M., Falocco, S., De Cicco, Demetra (5201245), Paolillo, M. (5201197), Vst Sudare/Voice Team, VST-SUDARE/VOICE team (5268766), PAOLILLO, MAURIZIO, Paolillo, M., FALOCCO, SERENA, de Cicco, Demetra   +12 more
core   +1 more source

Radio Activity Across Accretion State Changes in Changing-look AGNs: Insights from FIRST and VLASS Over Two Decades

The Astrophysical Journal
Changing-look active galactic nuclei (CL-AGNs) provide a unique opportunity to probe the coupling between accretion flows and relativistic jets in supermassive black holes.
Zhi-Qiang Chen, Wei-Jian Guo, Victoria A. Fawcett, Jun-Jie Jin, Wen-Ke Ren, Hengxiao Guo, Min-Feng Gu, Yan-Mei Chen, Lu Feng, Hu Zou, Qi-Rong Yuan   +10 more
doaj   +1 more source

Engineered 3D Fibronectin‐Based Environments Modulate the Pathogenic Profile of Arthritic Synovial Fibroblasts

Advanced NanoBiomed Research, EarlyView.
Fibroblast behavior is shaped by the surrounding microenvironment, yet conventional culture systems often fail to capture disease‐relevant phenotypes. Here, platform‐dependent responses of healthy and arthritic synovial fibroblasts are examined across 2D and 3D culture systems. Distinct inflammatory and proliferative signatures emerge, highlighting how
Aneesah Khan, Piaopiao Pan, Yanling Lan, Çağlar Çi̇l, Julia Isakova, Yilin Wang, Theodora Rogkoti, Thanutchaporn Sartyoungkul, James F. C. Windmill, Jonathan William, Manuel Salmeron‐Sanchez, Margaret H. Harnett, Oana Dobre, Miguel A. Pineda   +13 more
wiley   +1 more source

Shocks, Winds, and a Torus: the Large Binocular Telescope Interferometer (LBTI) Resolves the Active Nucleus of NGC 4151

The Astrophysical Journal
We present mid-infrared (MIR) observations of the Seyfert 1 galaxy NGC 4151 using the Large Binocular Telescope Interferometer (LBTI). We took open-loop Fizeau images with 66–104 mas (5.8–9.1 pc) resolution in the N -band (at 8.7 and 10.5  μ m), using ...
Jacob W. Isbell, Steve Ertel, Makoto Kishimoto, Gerd Weigelt, Jörg-Uwe Pott, Jared Carlson, Qixiang Duan, Violeta Gámez Rosas, Walter Jaffe, James Leftley, Daniel May, Romain. G. Petrov, Jennifer Power, Hélène Rousseau, Justin Rupert   +14 more
doaj   +1 more source

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

Study of the radio and optical properties of Active Galactic Nuclei

Communications of the Byurakan Astrophysical Observatory, 2021
The investigation of the physical properties of active galactic nuclei is one of the most important tasks of astronomy. Until now, the properties of AGN have not been fully studied. Therefore, we have studied a number of important properties of AGN. For example, one of the main properties of AGN is the variability.
openaire   +1 more source

SDSS J110546.07+145202.4: The First Long-duration Radio Changing-look NLS1 Galaxy

The Astrophysical Journal
SDSS J110546.07+145202.4 stands out as a unique radio changing-look narrow-line Seyfert 1 (NLS1) galaxy that has brightened dramatically and shows an exceptionally long duration of its “on” phase.
S. Komossa, D. Grupe, A. Kraus, P.G. Edwards, E. F. Kerrison, K. Rose, R. Soria, T. An, M.J. Hardcastle, K.É. Gabányi, S. Panda, D.W. Xu, J. Wang, S. Frey, A. Mezősi   +14 more
doaj   +1 more source

Talin1 Adhesion Morphology and Colocalization With Tensin3 Are Largely Unaffected by Polyacrylamide Substrate Stiffness

Cytoskeleton, EarlyView.
ABSTRACT Cells sense the stiffness of their extracellular matrix (ECM) and adapt their behavior accordingly. We investigated how ECM stiffness affects the spatial organization of talin1, a key mechanosensitive focal adhesion protein. Using polyacrylamide (PA) hydrogels with tunable stiffnesses (0.2–188 kPa), we analyzed cell morphology, migration ...
Joanna Hajduk, Patrycja Twardawa, Sylwia Bobis‐Wozowicz, Marta Szewczyk, Zenon Rajfur, Zbigniew Baster   +5 more
wiley   +1 more source

Fast radio bursts in the discs of active galactic nuclei

Monthly Notices of the Royal Astronomical Society
ABSTRACT Fast radio bursts (FRBs) are luminous millisecond-duration radio pulses with extragalactic origin, which were discovered more than a decade ago. Despite the numerous samples, the physical origin of FRBs remains poorly understood. FRBs have been thought to originate from young magnetars or accreting compact objects (COs). Massive
Z Y Zhao, K Chen, F Y Wang, Zi-Gao Dai
openaire   +2 more sources

Cosmic Evolution of Nearby Radio Active Galactic Nuclei

Journal of Physics: Conference Series, 2019
Abstract The exact formation mechanism of massive galaxy in the universe still become an open question in modern astrophysics. Radio emission from active galactic nucleus (AGN) is known to be suppressing stellar growth in the most massive galaxies, thus becoming significant ingredient in modeling galaxy formation process.
Taufik Andika, I., Ikbal Arifyanto, M., Istiqomah, A., Amalina, S., Aprilia, Hakim, M.   +5 more
openaire   +2 more sources