Results 1 to 10 of about 142,027 (204)

A Census of WISE-selected Dual and Offset AGNs Across the Sky: New Constraints on Merger-driven Triggering of Obscured AGNs

open access: yesThe Astrophysical Journal, 2023
Pairs of galaxies hosting active galactic nuclei (AGNs) are powerful probes of merger-driven supermassive black hole (SMBH) growth as they can resolve individual AGNs and trace mergers over a large range of physical separations.
R. Scott Barrows   +3 more
doaj   +1 more source

Two Candidates for Dual AGN in Dwarf-dwarf Galaxy Mergers

open access: yesThe Astrophysical Journal, 2023
Dual active galactic nuclei (DAGN) are important for understanding galaxy-merger-triggered fueling of black holes and the hierarchical growth of structures.
Marko Mićić   +3 more
doaj   +1 more source

Identifying Galaxy Mergers in Simulated CEERS NIRCam Images Using Random Forests

open access: yesThe Astrophysical Journal, 2023
Identifying merging galaxies is an important—but difficult—step in galaxy evolution studies. We present random forest (RF) classifications of galaxy mergers from simulated JWST images based on various standard morphological parameters.
Caitlin Rose   +25 more
doaj   +1 more source

Numerical simulations of the chemical evolution of complex gravitating disk and dwarf galaxies system

open access: yesВісник Астрономічної школи, 2004
In this work we have simulated the evolution of disk and dwarf galaxies gravitating system, using our viscosity algorithm. We investigated changes in disk galaxy chemical abundance due to minor merger of dwarf galaxy with lower abundance of heavy ...
T. A. Shumakova, P. P. Berczik
doaj   +1 more source

Isolated Galaxies versus Interacting Pairs with MaNGA

open access: yesGalaxies, 2015
We present preliminary results of the spectral analysis on the radial distributions of the star formation history in both a galaxy merger and a spiral isolated galaxy observed with MaNGA.
María del Carmen Argudo Fernández   +5 more
doaj   +1 more source

Decoding Galactic Merger Histories

open access: yesGalaxies, 2017
Galaxy mergers are expected to influence galaxy properties, yet measurements of individual merger histories are lacking. Models predict that merger histories can be measured using stellar halos and that these halos can be quantified using observations of
Eric F. Bell   +7 more
doaj   +1 more source

The Dragonfly Galaxy. III. Jet Brightening of a High-redshift Radio Source Caught in a Violent Merger of Disk Galaxies

open access: yesThe Astrophysical Journal, 2023
The Dragonfly galaxy (MRC 0152-209), the most infrared-luminous radio galaxy at redshift z ∼ 2, is a merger system containing a powerful radio source and large displacements of gas.
Sophie Lebowitz   +10 more
doaj   +1 more source

Back to the Green Valley: How to Rejuvenate an S0 Galaxy through Minor Mergers

open access: yesGalaxies, 2015
About half of the S0 galaxies in the nearby Universe show signatures of recent or ongoing star formation. Whether these S0 galaxies were rejuvenated by the accretion of fresh gas is still controversial.
Michela Mapelli
doaj   +1 more source

Extragalactic Magnetism with SOFIA (SALSA Legacy Program): The Magnetic Fields in the Multiphase Interstellar Medium of the Antennae Galaxies

open access: yesThe Astrophysical Journal Letters, 2022
Mergers are thought to be a fundamental channel for galaxy growth, perturbing the gas dynamics and the magnetic fields ( B -fields) in the interstellar medium (ISM).
Enrique Lopez-Rodriguez   +10 more
doaj   +1 more source

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