Results 31 to 40 of about 48,775 (298)

Automatic quantitative morphological analysis of interacting galaxies [PDF]

, 2013
The large number of galaxies imaged by digital sky surveys reinforces the need for computational methods for analyzing galaxy morphology. While the morphology of most galaxies can be associated with a stage on the Hubble sequence, morphology of galaxy ...
Holincheck, Anthony, Shamir, Lior, Wallin, John   +2 more
core   +1 more source

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

SDSS-IV MaNGA: How Galaxy Interactions Influence Active Galactic Nuclei

The Astrophysical Journal, 2023
We present a comparative study of active galactic nuclei (AGN) between galaxy pairs and isolated galaxies with the final data release of the MaNGA integral field spectroscopic survey.
Joshua L. Steffen, Hai Fu, Joel R. Brownstein, J. M. Comerford, I. Cruz-González, Y. Sophia Dai, Niv Drory, Arran C. Gross, C. Alenka Negrete, Renbin Yan   +9 more
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

The Effect of Gas Fraction on the Morphology and Time-scales of Disc Galaxy Mergers [PDF]

, 2009
Gas-rich galaxy mergers are more easily identified by their disturbed morphologies than mergers with less gas. Because the typical gas fraction of galaxy mergers is expected to increase with redshift, the under-counting of low gas-fraction mergers may ...
Abazajian, Abraham, Barden, Barnes, Barnes, Bell, Bell, Bell, Bournaud, Bournaud, Boylan-Kolchin, Boylan-Kolchin, Brinchmann, Brown, Bundy, Bundy, Cassata, Conselice, Conselice, Conselice, Cox, Cox, Cox, Cox, Cox, Daddi, De Ravel, Di Matteo, Di Matteo, Erb, Erb, Faber, Hopkins, Hopkins, Hopkins, Jennifer M. Lotz, Joel R. Primack, Jogee, Johansson, Jonsson, Jonsson, Jonsson, Katz, Kennicutt, Khalatyan, Le Fèvre, Leitherer, Lin, Lin, Lopez-Sanjuan, Lotz, Lotz, Lotz, Lotz, Martig, Melbourne, Mihos, Naab, Naab, Noekse, Patrik Jonsson, Patton, Robertson, Robertson, Rocha, Shi, Sinha, Springel, Springel, Springel, T. J. Cox, Tacconi, Van Dokkum, Wetzstein   +73 more
core   +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
openaire   +3 more sources

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, Borne, Kirk, Bushouse, Howard, Lucas, Ray A, Rowan-Robinson, Michael, Lawrence, Andy, Clements, David, Baker, Amanda, Oliver, Seb   +8 more
openaire   +1 more source

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

The 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, Julia M. Comerford, Daniel Stern, Roberto J. Assef   +3 more
doaj   +1 more source

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, Schawinski, K, Caplar, N, Carpineti, A, Hart, R, Kaviraj, S, Keel, W, Kruk, S, Lintott, C, Nichol, R, Simmons, B, Smethurst, R   +11 more
openaire   +5 more sources

Improved Constraints on Mergers with SZ, Hydrodynamical simulations, Optical, and X-ray (ICM-SHOX) [PDF]

EPJ Web of Conferences
Galaxy cluster mergers are representative of a wide range of physics, making them an excellent probe of the properties of dark matter and the ionized plasma of the intracluster medium.
Silich E.M., Bellomi E., Sayers J., ZuHone J., Chadayammuri U., Golwala S., Hughes D., Montaña A., Mroczkowski T., Nagai D., Sánchez D., Stanford S.A., Wilson G., Zemcov M., Zitrin A.   +14 more
doaj   +1 more source