Results 111 to 120 of about 184,376 (200)

Adiabatic Index in Fluid Models of Collisionless Black Hole Accretion

The Astrophysical Journal
Models of highly sub-Eddington accretion onto black holes commonly use a single-fluid model for the collisionless, near-horizon plasma. These models must specify an equation of state.
Charles F. Gammie
doaj   +1 more source

Active galactic nuclei dust tori at low and high luminosities [PDF]

, 2007
S. F. Hönig, T. Beckert
openalex   +1 more source

Revision of Two-temperature Magnetically Arrested Flows onto a Black Hole

The Astrophysical Journal
We revisit the radiative properties of 3D general relativistic magnetohydrodynamics (GRMHD) two-temperature magnetically arrested disk (MAD) models in which electrons are heated by a magnetic turbulent cascade.
M. Mościbrodzka
doaj   +1 more source

Search for High-excitation Emission Lines from a Quasar-scale Active Nucleus in Arp 220

The Astrophysical Journal
The late-stage galaxy merger and prototypical ultraluminous infrared galaxy (ULIRG) Arp 220 is probed using the JWST Mid Infrared Instrument medium-resolution spectrometer to search for multiple diagnostic active galactic nuclei (AGN) emission lines in ...
Charles E. Goldberg, Victorine A. Buiten, George H. Rieke, Almudena Alonso-Herrero, A. Paggi, Paul van der Werf, Meredith A. Stone, Jane E. Morrison, Stacey Alberts, Dan Dicken, Gillian Wright   +10 more
doaj   +1 more source

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

Sci Adv, 2023
Shen L, Liu G, He Z, Zakamska NL, Glikman E, Greene JE, Hu W, Mou G, Wylezalek D, Rupke DSN.   +9 more
europepmc   +1 more source

Spectral Energy Distribution Models for Low-luminosity Active Galactic Nuclei in LINERs

, 2011
Low-luminosity active galactic nuclei (LLAGNs) represent the bulk of the AGN population in the present-day universe and they trace the low-level accreting supermassive black holes. In order to probe the accretion and jet physical properties in LLAGNs as a class, we model the broadband radio to X-rays spectral energy distributions (SEDs) of 21 LLAGNs in
Nemmen, Rodrigo, Storchi-Bergmann, Thaisa, Eracleous, Michael   +2 more
openaire   +2 more sources

Extragalactic Science with the Orbiting Astronomical Satellite Investigating Stellar Systems (OASIS) Observatory. [PDF]

Space Sci Rev, 2023
Aalto S, Battersby C, Chin G, Hunt LK, Rigopoulou D, Stark AA, Viti S, Walker CK.   +7 more
europepmc   +1 more source

The anticorrelation between the hard X-ray photon index and the Eddington ratio in low-luminosity active galactic nuclei [PDF]

, 2009
Minfeng Gu, Xinwu Cao
openalex   +1 more source

Cosmic ray feedback in galaxies and galaxy clusters: A pedagogical introduction and a topical review of the acceleration, transport, observables, and dynamical impact of cosmic rays. [PDF]

Astron Astrophys Rev, 2023
Ruszkowski M, Pfrommer C.
europepmc   +1 more source

A Detailed Look at a Trio of Changing-look Quasars: Spectral Energy Distributions and the Dust Extinction Test

The Astrophysical Journal
Changing-look quasars (CLQs) exhibit dramatic variability in broad emission-line fluxes on short timescales. This behavior is challenging to many models of the quasar broad-line region, due in large part to the short transition times between high and low
Laura Duffy, Michael Eracleous, Jessie C. Runnoe, John J. Ruan, Scott F. Anderson, Sabrina Dimassimo, Paul Green, Stephanie LaMassa   +7 more
doaj   +1 more source