Results 21 to 30 of about 46,640 (252)
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
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
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
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
Sersic properties of disc galaxy mergers [PDF]
Monthly Notices of the Royal Astronomical Society, 2006 Sersic parameters characterising the density profiles of remnants formed in collision-less disc galaxy mergers are obtained; no bulge is included in our simulations. For the luminous component we find that the Sersic index is n ~ (1.5,5.3) with ~ 3 +/- 1 and an effective radius of R_e ~ (1.6,12.9) kpc with ~ 5 +/- 3 kpc.
Aceves, H., Velazquez, H., Cruz, F.
openaire +2 more sources
Dark Matter Halo Mergers I: Dependence on Environment & Redshift Evolution [PDF]
, 2009 This paper presents a study of the specific merger rate as a function of group membership, local environment, and redshift in a very large, $500h^{-1} Mpc$, cosmological N-body simulation, the \textit{Millennium Simulation}.
A. Tasitsiomi +41 more
core +2 more sources
The Formation of Giant Elliptical Galaxies and Their Globular Cluster Systems [PDF]
, 1998 The bimodal globular cluster (GC) metallicity distributions of many giant elliptical galaxies are often cited as evidence for the formation of such galaxies through mergers involving gas-rich spirals.
Cote, Patrick +2 more
core +2 more sources
Mergers of Luminous Early-Type Galaxies [PDF]
Proceedings of the International Astronomical Union, 2009 Galaxy mergers play an important role in many astrophysical processes, such as growth of massive galaxies, triggering AGN, formation of supermassive black hole (SMBH) binaries, and gravitational wave (GW) radiation. Merger rate is one of key quantities for these studies.
Wen, Z. L., Han, J. L., Liu, F. S.
openaire +2 more sources
Interacting galaxies and mergers
Nature Astronomy, 2019 Two landmark papers in the 1970s contributed strongly to establishing the importance of galaxy interactions and mergers in the formation and evolution of galaxies, using only gravity, and the ensuing dynamical friction.
Athanassoula, E., Bosma, Albert
openaire +3 more sources