Results 31 to 40 of about 282 (177)
Spectral Energy Distributions of Flat‐Spectrum Radio Quasars Observed withBeppoSAX
The Astrophysical Journal, 2002 5 figures; ApJ, in ...
TAVECCHIO F. +11 more
openaire +5 more sources
INCIDENCE OF Mg II ABSORPTION SYSTEMS TOWARD FLAT-SPECTRUM RADIO QUASARS [PDF]
The Astrophysical Journal, 2012 The conventional wisdom that the rate of incidence of Mg II absorption systems, dN/dz (excluding `associated systems' having velocity beta*c relative to the AGN of less than ~5000 km/s) is totally independent of the background AGN, has been challenged by a recent finding that dN/dz for strong Mg II absorption systems towards distant blazars is 2.2 \pm_{
Chand, Hum, Gopal-Krishna
openaire +2 more sources
Intra-Day Variability Observations of Two Dozens of Blazars at 4.8 GHz
Universe, 2021 Two dozens of radio loud active galactic nuclei (AGNs) have been observed with Urumqi 25 m radio telescope in order to search for intra-day variability (IDV).
Xiang Liu +6 more
doaj +1 more source
Modelling the multi-wavelength emission of flat-spectrum radio quasar 3C 279 [PDF]
Monthly Notices of the Royal Astronomical Society, 2016 7 pages, 3 figures, published in MNRAS (2016MNRAS.457.3535Z)
Zheng, Y. G., Yang, C. Y.
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Constraints of flat spectrum radio quasars in the hadronic model: the case of 3C 273 [PDF]
Monthly Notices of the Royal Astronomical Society, 2015 We present a method of constraining the properties of the $γ$-ray emitting region in flat spectrum radio quasars (FSRQs) in the one-zone proton synchrotron model, where the $γ$-rays are produced by synchrotron radiation of relativistic protons. We show that for low enough values of the Doppler factor $δ$, the emission from the electromagnetic (EM ...
Petropoulou, Maria +1 more
openaire +2 more sources
Powers and Magnetization of Blazar Jets
Galaxies, 2016 In this work I review the observational constraints imposed on the energetics and magnetisation of quasar jets, in the context of theoretical expectations.
Marek Sikora
doaj +1 more source
Narrow-Line Seyfert 1 Galaxies With Absorbed Jets–Insights From Radio Spectral Index Maps
Frontiers in Astronomy and Space Sciences, 2021 Narrow-line Seyfert 1 (NLS1) galaxies are active galactic nuclei (AGN) believed to be in the early stages of their evolution. A fraction of them have been found to host relativistic jets.
Emilia Järvelä +3 more
doaj +1 more source
Material Strategies for Stimulation and Recording in Neural Biocomputing Platforms
Advanced Electronic Materials, EarlyView.Material strategies enabling stimulation and recording are central to neural biocomputing systems. This review examines how electronic materials govern the encoding of inputs and decoding of outputs in living neural networks. Advances in electrical, optical, and multimodal interfaces highlight emerging design principles for biocomputing platforms ...
Sehong Kang +5 more
wiley +1 more source
The Astrophysical JournalHigh-energy blazar light curves, in X-rays and beyond, have historically preferred a log-normal flux distribution, signifying multiplicative processes either in the jet itself or due to connection(s) with accretion.
Agniva Roychowdhury
doaj +1 more source
What We Talk about When We Talk about Blazars?
Frontiers in Astronomy and Space Sciences, 2017 After the discovery of powerful relativistic jets from Narrow-Line Seyfert 1 Galaxies, and the understanding of their similarity with those of blazars, a problem of terminology was born.
Luigi Foschini
doaj +1 more source