Results 231 to 240 of about 63,914 (268)
Electromotive field in space and astrophysical plasmas. [PDF]
Rev Mod Plasma PhysBourdin PA, Narita Y.
europepmc +1 more source
Senolytic agent ABT-263 mitigates low- and high-LET radiation-induced gastrointestinal cancer development in Apc1638N/+ mice. [PDF]
Aging (Albany NY)Kumar K +6 more
europepmc +1 more source
The multiwavelength behaviour of BL Lacertae explained by a wiggling filamentary jet
Raiteri C.
europepmc +1 more source
Some of the next articles are maybe not open access.
Related searches:
Related searches:
X-rays from active galactic nuclei ? Hard component
Space Science Reviews, 1981It is now well known that X-ray emission in active galactic nuclei (AGN) is a fairly common phenomenon (see M.J. Rees’s review in this volume). By examining the recent observational information from Ariel V, HEAO-1, and the Einstein Observatory, we have reached the conclusion (Tsuruta 1981) that the following interpretation may be used as a relevant ...
S. Tsuruta, F. Takahara, S. Ichimaru
openaire +1 more source
X-Ray Weak Active Galactic Nuclei from Super-Eddington Accretion onto Infant Black Holes
Astrophysical Journal LettersA simple model for the X-ray weakness of James Webb Space Telescope–selected broad-line active galactic nuclei (AGNs) is proposed under the assumption that the majority of these sources are fed at super-Eddington accretion rates. In these conditions, the
P. Madau, F. Haardt
semanticscholar +1 more source
Astrophysical Journal Letters
Recent James Webb Space Telescope observations have revealed a population of compact extragalactic objects at z ≳ 4 with red near-infrared colors, which have been dubbed as “Little Red Dots” (LRDs).
M. Yue +5 more
semanticscholar +1 more source
Recent James Webb Space Telescope observations have revealed a population of compact extragalactic objects at z ≳ 4 with red near-infrared colors, which have been dubbed as “Little Red Dots” (LRDs).
M. Yue +5 more
semanticscholar +1 more source
Hard X-rays emission from active galactic nuclei
Advances in Space Research, 1984Abstract The X-Rays emission from Active Galactic Nuclei has been known since the first observations obtained by Uhuru. their X-Rays spectra are determining to investigate the radiation process and for the diffuse X-Rays background problem. We will present spectral observations of AGN's in the range 20–100 KeV obtained with a one square meter area ...
P. Ubertini +5 more
openaire +1 more source
X-ray timing studies of Active Galactic Nuclei
AIP Conference Proceedings, 2008We present a power spectral analysis survey of 24 active galactic nuclei (AGN). We combine X‐ray observations to produce a power spectrum covering a broad range of Fourier frequencies and fit the power spectrum of each AGN using a single‐bend power‐law model.
D. P. Summons +7 more
openaire +1 more source
X-Ray Variability in Active Galactic Nuclei
1998X-ray variability is a distinguishing property of Active Galactic Nuclei (AGN), and the energetics and time scales of the emission dictate that the X-rays must originate very close to the central engine. In this review I discuss two basic topics from AGN variability research.
openaire +1 more source