Results 31 to 40 of about 51,951 (281)
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
Dwarf galaxy merger-induced star formation rate: A case study of Mrk 1481
BibechanaThe merger of the galaxies serves as a trigger for the increase in the galaxy’s star formation rate (SFR), which can be quantified by observing the column density of the Hα line.
Daya Nidhi Chhatkuli +3 more
doaj +3 more sources
Two tails in NGC 3656, and the major merger origin of shell and minor axis dust lane ellipticals [PDF]
, 1997 I report on the discovery of two faint (~ 26.8 Rmag/arcsec^2) tidal tails around the shell elliptical NGC 3656 (Arp 155). This galaxy had previously been interpreted as a case of accretion, or minor merger.
Dupraz C. +7 more
core +2 more sources
The Open Journal of Astrophysics, 2023 Despite the importance of Active Galactic Nuclei (AGN) in galaxy evolution, the mechanisms that fuel AGN activity remain poorly understood. Theoretical models suggest that major mergers of galaxies contribute strongly to AGN fuelling, particularly at ...
Carolin Villforth
doaj +1 more source
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
Identifying Galaxy Mergers in Simulated CEERS NIRCam Images Using Random Forests
The 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
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
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Ultraluminous Infrared Galaxies: Mergers of Sub‐L* Galaxies? [PDF]
The Astrophysical Journal, 2001 A sample of 27 low-redshift, mostly cool, ultraluminous infrared galaxies (ULIRGs) has been imaged at 1.6 μm with the Hubble Space Telescope (HST) Near-Infrared Camera and Multi-Object Spectrometer (NICMOS). The majority (67%) of the sample's galaxies are multiple-nucleus galaxies with projected separations of up to 17 kpc, and the rest of the sample ...
Colina, Luis +8 more
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Galaxy Zoo: Major Galaxy Mergers Are Not a Significant Quenching Pathway* [PDF]
The Astrophysical Journal, 2017 Abstract We use stellar mass functions to study the properties and the significance of quenching through major galaxy mergers. In addition to SDSS DR7 and Galaxy Zoo 1 data, we use samples of visually selected major galaxy mergers and post-merger galaxies.
Weigel, A +11 more
openaire +5 more sources