Results 21 to 30 of about 1,170,090 (200)
FOURIER ANALYSIS OF BLAZAR VARIABILITY [PDF]
The Astrophysical Journal, 2014 Blazars display strong variability on multiple timescales and in multiple radiation bands. Their variability is often characterized by power spectral densities (PSDs) and time lags plotted as functions of the Fourier frequency. We develop a new theoretical model based on the analysis of the electron transport (continuity) equation, carried out in the ...
Finke, Justin D., Becker, Peter A.
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Models of Variability in Blazar Jets [PDF]
Publications of the Astronomical Society of Australia, 2002 AbstractDuring the last decade multiwavelength observations of blazars have revealed many interesting patterns in their emission across the EM spectrum. In the present article we will review the time-dependent one-zone models and the models which advocate an acceleration and a radiation zone, and we will make some comparisons between them, especially ...
Mastichiadis, A., Kirk, J.G.
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Intranight optical variability of blazars [PDF]
Monthly Notices of the Royal Astronomical Society, 2004 We present results of a multi-epoch intra-night optical monitoring of eleven blazars consisting of six BL Lac objects and five radio core-dominated quasars (CDQs). These densely sampled and sensitive R-band CCD observations, carried out from November 1998 through May 2002 during a total of 47 nights with an average of 6.5 hours/night, have enabled us ...
Sagar, Ram +3 more
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Radio variability of blazars [PDF]
Proceedings of the International Astronomical Union, 2010 AbstractIn this work, we present the analysis results using UMRAO preliminary data base. We used the light curves 1) to get the shortest timescales and then to get the brightness temperature so that we can estimate the Doppler factors; 2) to investigate the periodicity and discuss the variability index.
J. H. Fan, W. Xu, J. Pan, Y. H. Yuan
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A numerical study of long-term multiwavelength blazar variability
, 2021 International audienceDecade-long monitoring of blazars at optical and infrared (OIR) wavelengths with the Small and Moderate Aperture Research Telescope System (SMARTS) in Chile and in γ-rays with the Fermi -Large Area Telescope (LAT) has enabled the ...
Petropoulou, M. +6 more
core +3 more sources
Blazar variability -- expect the unexpected [PDF]
Proceedings of High Energy Astrophysics in Southern Africa — PoS(HEASA2018), 2019 10 pages, proceedings paper of an invited talk at the conference "High Energy Astrophysics in Southern Africa (HEASA 2018)" held in Parys, South ...
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Immunohistopathology of oral mucosal chronic graft‐versus‐host disease severity and duration
Oral Diseases, Volume 29, Issue 8, Page 3346-3359, November 2023., 2023 Abstract Objective Chronic graft‐versus‐host disease (cGVHD) is the main cause of late non‐relapse mortality following hematopoietic cell transplantation. Oral mucosal (om‐) cGVHD is common, but diagnosis and assessment rely on clinical interpretation and patient‐reported symptoms.
Victor Tollemar +8 more
wiley +1 more source
Variability study of the Hβ emission line in the blazar PKS 1510-089 [PDF]
, 2023 Blazars are a type of active galactic nucleus (AGN) characterized by their intense and variable emissions across the electromagnetic spec- trum, from radio to -rays.
Alfredo Amador-Portes
core
A tool to understand emission mechanisms of blazars through their high‐energy gamma‐ray emission
Astronomische Nachrichten, Volume 344, Issue 6, August 2023., 2023 The blazar SED is characterized by two energy components. Evidence suggests that the low‐energy component is generated by the synchrotron mechanism, but for the high‐energy component, the mechanism is still uncertain. Two main models have been proposed to explain this emission. According to the leptonic model, a correlation between the emission of both
Mabel Osorio +3 more
wiley +1 more source
Optical Variability of Blazars [PDF]
The Astrophysical Journal Supplement Series, 2000 In this paper we show the results of our monitoring the flux variability of 15 blazars, within the redshift range of 0.07 - 2.06, all with a visual magnitude range between 14 and 20 mag. Because blazars have displayed variability on diverse timescales, we have chosen to study them over both short and long timescales, ranging from minutes to years ...
K. K. Ghosh +3 more
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