Results 101 to 110 of about 55,785 (258)
Gas accretion in disk galaxies
, 2013 Gas accretion is necessary to maintain star formation, spiral and bar structure, and secular evolution in galaxies. This can occur through tidal interaction, or mass accretion from cosmic filaments. Different processes will be reviewed to drive gas towards galaxy centers and trigger starbursts and AGN. The efficiency of these dynamical processes can be
openaire +2 more sources
Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.Abstract We present large‐scale simulations of energetic neutral atom (ENA) emissions at Uranus from a spacecraft viewpoint. Models of magnetic field, extended hydrogen exosphere, moon‐sourced neutral tori, and proton radiation belt are implemented into a simulator to evaluate the production of ENAs for L $L$ = 1–15.
D. Santos‐Costa, N. André
wiley +1 more source
The properties of discrete X-ray sources in star-forming galaxies [PDF]
, 2012 Observations of starburst galaxies have revealed a large number of point-like X-ray sources located within these systems, including active galactic nuclei (AGN), X-ray binaries (XRBs), and utraluminous X-ray sources (ULXs).
JACKSON, FLOYD,EMMANUEL
core
Highly efficient star formation in NGC 5253 possibly from stream-fed accretion [PDF]
Nature, 2015 Gas clouds in present-day galaxies are inefficient at forming stars. Low star-formation efficiency is a critical parameter in galaxy evolution: it is why stars are still forming nearly 14 billion years after the Big Bang and why star clusters generally ...
J. Turner +8 more
semanticscholar +1 more source
Intermediate-mass black hole incubators
Astronomy & AstrophysicsContext. The stellar dynamical evolution of massive star clusters formed during starburst periods leads to the segregation of ≳104 M⊙ stellar-mass black hole sub-clusters in their centres.
Haas Jaroslav +2 more
doaj +1 more source
Tidal disruption flares as the source of ultra-high energy cosmic rays
EPJ Web of Conferences, 2012 The optical spectral energy distributions of two tidal disruption flares identified by van Velzen et al. (2011) in archival SDSS data, are found to be well-fit by a thin-accretion-disk model.
Farrar G.R.
doaj +1 more source
Gas-phase Metallicity Profiles of Star-forming Galaxies in the Modified Accretion Disk Framework
The Astrophysical Journal, 2022 Abstract Simulations indicate that the inflow of gas of star-forming galaxies is almost coplanar and corotating with the gas disk, and that the outflow of gas driven by stellar winds and/or supernova explosions is preferentially perpendicular to the disk.
Enci Wang, Simon J. Lilly
openaire +3 more sources
Solar Energetic Particle Prediction in the Inner Heliosphere Using Deep Learning and PSP/IS⊙IS Data
Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 3, June 2026.Abstract Solar events, such as coronal mass ejections and solar flares, accelerate large numbers of energetic charged particles, producing solar energetic particle (SEP) events that can harm astronauts, damage satellites, and potentially damage infrastructure on Earth.
Tate Hutchins +12 more
wiley +1 more source
Quasars Probing Galaxies. I. Signatures of Gas Accretion at Redshift z ≈ 0.2 [PDF]
, 2016 We describe the kinematics of circumgalactic gas near the galactic plane, combining new measurements of galaxy rotation curves and spectroscopy of background quasars.
S. Ho +3 more
semanticscholar +1 more source
The New Fundamental Plane of 4FGL Blazars Based on the Black Hole Spin-mass Energy
The Astrophysical JournalThe fundamental plane is a key scaling relation connecting jet power, accretion, and black hole mass in active galactic nuclei. In this work, we construct a sample of 73 Fermi-Large Area Telescope-detected 4FGL blazars and explore an extended version of ...
Xu Zhang +5 more
doaj +1 more source