Zobrazeno 1 - 6
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pro vyhledávání: '"Randall Dannen"'
Publikováno v:
The Astrophysical Journal, Vol 970, Iss 2, p 150 (2024)
In disk-wind models for active galactic nuclei outflows, high-energy radiation poses a significant problem wherein the gas can become overionized, effectively disabling what is often inferred to be the largest force acting on the gas: the radiation f
Externí odkaz:
https://doaj.org/article/292c732083ca49d9aee0c79854475d63
Publikováno v:
The Astrophysical Journal, Vol 961, Iss 2, p 221 (2024)
Observations of ionized outflows from active galactic nuclei (AGNs) provide evidence of energy and momentum transfer from the AGN radiation to the plasma. The AGN radiation is very energetic. Therefore, at distances of parsec scale, where gravity is
Externí odkaz:
https://doaj.org/article/06e5eb60cb2d44b5882cc26a86130259
Publikováno v:
The Astrophysical Journal. 931:134
Acceleration can change the ionization of X-ray irradiated gas to the point that the gas becomes thermally unstable. Cloud formation, the expected outcome of thermal instability (TI), will be suppressed in a dynamic flow, however, due to the stretchi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e19dc8cca02211553ec1a51bf790f232
https://doi.org/10.3847/1538-4357/ac6612
https://doi.org/10.3847/1538-4357/ac6612
Autor:
Sergei Dyda, Tim Waters, Paola Rodriguez Hidalgo, Margherita Giustini, Jon M. Miller, John C. Raymond, Shalini Ganguly, Timothy R. Kallman, Daniel Proga, Randall Dannen
Publikováno v:
DIGITAL.INTA Repositorio Digital del Instituto Nacional de Técnica Aeroespacial
instname
instname
The warm absorbers observed in more than half of all nearby active galactic nuclei (AGN) are tracers of ionized outflows located at parsec scale distances from the central engine. If the smallest inferred ionization parameters correspond to plasma at
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::33d23029bd10d03a52b3752d9fc99ba5
http://hdl.handle.net/20.500.12666/745
http://hdl.handle.net/20.500.12666/745
One of the main mechanisms that could drive mass outflows in AGNs is radiation pressure due to spectral lines. Although straightforward to understand, the actual magnitude of the radiation force is challenging to compute because the force depends on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::57f618a7dd187ce7dda136960693af9e
http://arxiv.org/abs/1812.01773
http://arxiv.org/abs/1812.01773
There is increasing evidence that the highly ionized multiphase components of AGN disk winds may be due to thermal instability. The ions responsible for forming the observed X-ray absorption lines may only exist in relatively cold clumps that can be
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5cc24051cf79f52421bb4825f07a710f