Results 181 to 190 of about 50,208 (269)

X-ray Spectroscopy of Distant Active Galactic Nuclei

open access: yes, 2017
The physical structure and behaviour of stars have been studied extensively throughout centuries.In contrast, the existence of objects now known as Active Galaxies has only been established since a couple of decades. The nucleus of such an object radiates an extraordinary amount of light across the electromagnetic spectrum, sometimes outshining the ...
Börjeson, Charlie, Cohen, Julia
openaire   +1 more source

On measuring the Hubble constant with X-ray reverberation mapping of active galactic nuclei

open access: green, 2021
Adam Ingram   +10 more
openalex   +2 more sources

Discovery of spectacular quasar-driven superbubbles in red quasars. [PDF]

open access: yesSci Adv, 2023
Shen L   +9 more
europepmc   +1 more source

X-ray astronomy from the lunar surface. [PDF]

open access: yesPhilos Trans A Math Phys Eng Sci
Gandhi P.
europepmc   +1 more source

X-ray view of dissipative warm corona in active galactic nuclei [PDF]

open access: green
Biswaraj Palit   +10 more
openalex   +1 more source

The DEEP Groth Strip Survey. VI. Spectroscopic, Variability, and X‐Ray Detection of Active Galactic Nuclei [PDF]

open access: green, 2006
Vicki L. Sarajedini   +10 more
openalex   +1 more source

Positioning, navigation, and timing on the Moon and Mars with galactic cosmic rays. [PDF]

open access: yesiScience
Leone G   +14 more
europepmc   +1 more source

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