Results 21 to 30 of about 48,775 (298)
Two Candidates for Dual AGN in Dwarf-dwarf Galaxy Mergers
The 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
The Chandra view of galaxy mergers [PDF]
Monthly Notices of the Royal Astronomical Society, 2007 From a Chandra survey of nine interacting galaxy systems the evolution of X-ray emission during the merger process has been investigated. It is found that the X-ray luminosity peaks ~300 Myr before nuclear coalescence, and then dips, even though we know that rapid and increasing activity is still taking place at this time.
Brassington, N. J. +2 more
openaire +3 more sources
Stellar populations in gas-rich galaxy mergers II. Feedback effects of Type Ia and II supernovae [PDF]
, 1998 We numerically investigate chemodynamical evolution of major disk-disk galaxy mergers in order to explore the origin of mass-dependent chemical, photometric, and spectroscopic properties observed in elliptical galaxies.
Aragon-Salamanca A. +22 more
core +3 more sources
Building the red sequence through gas-rich major mergers [PDF]
, 2009 Understanding the details of how the red sequence is built is a key question in galaxy evolution. What are the relative roles of gas-rich vs. dry mergers, major vs. minor mergers or galaxy mergers vs. gas accretion? In Wild et al.
Arnouts +4 more
core +1 more source
Growing the first galaxies’ merger trees
Monthly Notices of the Royal Astronomical Society, 2023 ABSTRACT Modelling the growth histories of specific galaxies often involves generating the entire population of objects that arise in a given cosmology and selecting systems with appropriate properties. This approach is highly inefficient when targeting rare systems such as the extremely luminous high-redshift galaxy candidates detected ...
Ethan O Nadler +4 more
openaire +2 more sources
The Role of AGN in Luminous Infrared Galaxies from the Multiwavelength Perspective
Universe, 2022 Galaxy mergers provide a mechanism for galaxies to effectively funnel gas and materials toward their nuclei and fuel the central starbursts and accretion of supermassive black holes.
Vivian U
doaj +1 more source
Galaxy mergers and gravitational lens statistics [PDF]
The Astrophysical Journal, 1994 We investigate the impact of hierarchical galaxy merging on the statistics of gravitational lensing of distant sources. Since no definite theoretical predictions for the merging history of luminous galaxies exist, we adopt a parametrized prescription, which allows us to adjust the expected number of pieces comprising a typical present galaxy at z=0.65.
Rix, Hans-Walter +3 more
openaire +2 more sources
Back to the Green Valley: How to Rejuvenate an S0 Galaxy through Minor Mergers
Galaxies, 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
The Effect of Mass Ratio on the Morphology and Time-scales of Disc Galaxy Mergers [PDF]
, 2009 The majority of galaxy mergers are expected to be minor mergers. The observational signatures of minor mergers are not well understood, thus there exist few constraints on the minor merger rate.
Abadi +61 more
core +1 more source
FULLY COMPRESSIVE TIDES IN GALAXY MERGERS [PDF]
The Astrophysical Journal, 2009 The disruptive effect of galactic tides is a textbook example of gravitational dynamics. However, depending on the shape of the potential, tides can also become fully compressive. When that is the case, they might trigger or strengthen the formation of galactic substructures (star clusters, tidal dwarf galaxies), instead of destroying them.
Renaud, Florent +3 more
openaire +2 more sources