Results 41 to 50 of about 18,989 (273)
MOJAVE. XVII. Jet Kinematics and Parent Population Properties of Relativistically Beamed Radio-loud Blazars [PDF]
Astrophysical Journal, 2019 We present results from a parsec-scale jet kinematics study of 409 bright radio-loud active galactic nuclei (AGNs) based on 15 GHz Very Long Baseline Array (VLBA) data obtained between 1994 August 31 and 2016 December 26 as part of the 2 cm VLBA survey ...
M. Lister +12 more
semanticscholar +1 more source
Journal of Research in Science Teaching, Volume 60, Issue 1, Page 164-195, January 2023., 2023 Abstract Although promoting student interest is a pivotal educational goal, student interest in science, and particularly in physics, declines substantially during secondary school. This study focused on the long‐term development of interest in physics at the lower secondary level (grades 5–7) and examined the role of teaching and teaching quality on ...
Lena Steidtmann +2 more
wiley +1 more source
General Physical Properties of Fermi Blazars
The Astrophysical Journal Supplement Series, 2023 We study the general physical properties of Fermi blazars using the Fermi fourth source catalog data (4FGL-DR2). The quasi-simultaneous multiwavelength data of Fermi blazars are fitted by using the one-zone leptonic model to obtain some physical ...
Yongyun Chen +8 more
doaj +1 more source
Macromolecular Materials and Engineering, Volume 307, Issue 10, October 2022., 2022 Decellularized extracellular matrix particles derived from porcine tracheal cartilage are added to gelatin‐methacryloyl, creating a yield stress fluid capable of forming self‐supporting structures. This bioink blend performs similarly at 25 °C to gelatin methacryloyl alone at 15 °C in linear resolution, print fidelity, and tensile mechanics.
Zachary Galliger +3 more
wiley +1 more source
Relativistic Jets of Blazars [PDF]
New Astronomy Reviews, 2019 To appear in New Astronomy Reviews special volume '100 Years of Astrophysical Jets' (eds. Rob Fender and Ralph Wijers).
Elina Lindfors +2 more
openaire +6 more sources
Multi-Wavelength Intra-Day Variability and Quasi-Periodic Oscillation in Blazars
Galaxies, 2017 We reviewed multi-wavelength blazars variability and detection of quasi-periodic oscillations on intra-day timescales. The variability timescale from a few minutes to up to less than a days is commonly known as intra-day variability.
Alok C. Gupta
doaj +1 more source
X-ray Spectral Evolution of High Energy Peaked Blazars
Galaxies, 2020 The synchrotron hump of the high energy peaked blazars generally lies in the 0.1–10 keV range and such sources show extreme flux and spectral variability in X-ray bands. Various spectral studies showed that the X-ray spectra of high energy peaked blazars
Haritma Gaur
doaj +1 more source
WIREs Data Mining and Knowledge Discovery, Volume 12, Issue 5, September/October 2022., 2022 This work presents a text‐mining‐based scientometric analysis of the scientific output in the last three decades regarding the use of artificial intelligence and machine learning in the fields of astronomy and astrophysics. Abstract Since the beginning of the 21st century, the fields of astronomy and astrophysics have experienced significant growth at ...
José‐Víctor Rodríguez +2 more
wiley +1 more source
Directional Association of TeV to PeV Astrophysical Neutrinos with Radio Blazars
, 2020 Recently we have shown that high-energy neutrinos above 200 TeV detected by IceCube are produced within several parsecs in the central regions of radio-bright blazars, that is active galactic nuclei with jets pointing toward us.
A. Plavin +3 more
semanticscholar +1 more source
Progress in Multi-Wavelength and Multi-Messenger Observations of Blazars and Theoretical Challenges [PDF]
Galaxies, 2019 This review provides an overview of recent advances in multi-wavelength and multi-messenger observations of blazars, the current status of theoretical models for blazar emission, and prospects for future facilities.
M. Boettcher
semanticscholar +1 more source