Results 51 to 60 of about 324,246 (376)
Evidence that 50% of BALQSO Outflows Are Situated at Least 100 pc from the Central Source [PDF]
, 2018 The most robust way for determining the distance of quasar absorption outflows is the use of troughs from ionic excited states. The column density ratio between the excited and resonance states yields the outflow number density. Combined with a knowledge
N. Arav +5 more
semanticscholar +1 more source
MAGNUM survey: A MUSE-Chandra resolved view on ionized outflows and photoionization in the Seyfert galaxy NGC1365 [PDF]
Astronomy & Astrophysics, 2018 Context. Ionized outflows, revealed by broad asymmetric wings of the [O III] λ5007 line, are commonly observed in active galactic nuclei (AGN) but the low intrinsic spatial resolution of the observations has generally prevented a detailed ...
G. Venturi +26 more
semanticscholar +1 more source
The origin of fast molecular outflows in quasars: Molecule formation in AGN-driven galactic winds [PDF]
, 2017 We explore the origin of fast molecular outflows that have been observed in Active Galactic Nuclei (AGN). Previous numerical studies have shown that it is difficult to create such an outflow by accelerating existing molecular clouds in the host galaxy ...
A. J. Richings, C. Faucher-Giguére
semanticscholar +1 more source
Metal-enriched galactic outflows shape the mass–metallicity relationship [PDF]
Monthly notices of the Royal Astronomical Society, 2018 The gas-phase metallicity of low-mass galaxies increases with increasing stellar mass (M*) and is nearly constant for high-mass galaxies. Theory suggests that this tight mass–metallicity relationship is shaped by galactic outflows removing metal-enriched
John Chisholm +2 more
semanticscholar +1 more source
Counterstreaming Cold H+, He+, O+, and N+ Outflows in the Plasmasphere
Frontiers in Astronomy and Space Sciences, 2021 The Naval Research Laboratory (NRL) Sami3 is Also a Model of the Ionosphere (SAMI3) ionosphere/plasmasphere code is used to examine H+, He+, N+, and O+ thermal outflows during a storm.
J. Krall, J. D. Huba
doaj +1 more source
Morphologies of protostellar outflows: An ALMA view [PDF]
, 2013 The formation of stars is usually accompanied by the launching of protostellar outflows. Observations with the Atacama Large Millimetre/sub-millimetre Array (ALMA) will soon revolutionalise our understanding of the morphologies and kinematics of these ...
Banerjee, Robi +4 more
core +1 more source
International Astronomical Union Colloquium, 1989 AbstractThis paper reviews recent developments in the study of bipolar outflows and their possible collimation by disklike structures. The exciting stars of most bipolar outflows are embedded in dense cores, self-gravitating structures with masses in the range of 1 to 103M⊙.
openaire +1 more source
Quenching star formation with quasar outflows launched by trapped IR radiation [PDF]
Monthly notices of the Royal Astronomical Society, 2017 We present cosmological radiation-hydrodynamic simulations, performed with the code Ramses-RT, of radiatively-driven outflows in a massive quasar host halo at $z = 6$.
T. Costa +3 more
semanticscholar +1 more source
Monthly Notices of the Royal Astronomical Society, 2010 I show that Eddington accretion episodes in AGN are likely to produce winds with velocities $v \sim 0.1c$ and ionization parameters up to $ \sim 10^4$ (cgs), implying the presence of resonance lines of helium-- and hydrogenlike iron. These properties are direct consequences of momentum and mass conservation respectively, and agree with recent X-ray ...
openaire +3 more sources
Widespread star formation inside galactic outflows [PDF]
Monthly notices of the Royal Astronomical Society, 2018 Several models have predicted that stars could form inside galactic outflows and that this would be a new major mode of galaxy evolution. Observations of galactic outflows have revealed that they host large amounts of dense and clumpy molecular gas ...
R. Gallagher +5 more
semanticscholar +1 more source