Results 71 to 80 of about 53,517 (330)

PHOTOMETRIC DECOMPOSITION OF MERGERS IN DISK GALAXIES [PDF]

The Astrophysical Journal, 2014
Several observational studies and numerical simulations suggest that mergers must contribute to the evolution of galaxies; however, the role that they play is not yet fully understood. In this paper we study a sample of 52 double nucleus disk galaxies that are considered as candidates for a minor merger event.
Mezcua, M., Lobanov, A. P., Mediavilla, E., Karouzos, M.   +3 more
openaire   +2 more sources

Solid Harmonic Wavelet Bispectrum for Image Analysis

Advanced Science, EarlyView.
The Solid Harmonic Wavelet Bispectrum (SHWB), a rotation‐ and translation‐invariant descriptor that captures higher‐order (phase) correlations in signals, is introduced. Combining wavelet scattering, bispectral analysis, and group theory, SHWB achieves interpretable, data‐efficient representations and demonstrates competitive performance across texture,
Alex Brown, Mathilda Avirett‐Mackenzie, Carolin Villforth, Georgios Exarchakis   +3 more
wiley   +1 more source

Simulating Subhalos at High Redshift: Merger Rates, Counts, and Types

, 2008
Galaxies are believed to be in one-to-one correspondence with simulated dark matter subhalos. We use high-resolution N-body simulations of cosmological volumes to calculate the statistical properties of subhalo (galaxy) major mergers at high redshift (z ...
Allgood, Andrew R. Wetzel, Barnes, Bell, Benson, Berlind, Berrier, Binney, Blain, Blumenthal, Bower, Boylan-Kolchin, Boylan-Kolchin, Carlberg, Cohn, Cohn, Cohn, Conroy, Conroy, Cooper, Cooray, Coppin, Cox, Davis, De Lucia, Dekel, Diemand, Diemand, Dubinski, Evrard, Fakhouri, Faltenbacher, Gao, Gao, Gawiser, Genel, Gerke, Ghigna, Ghigna, Giavalisco, Giocoli, Gnedin, Gottlöber, Guo, Harker, Hopkins, Hopkins, Hopkins, J. D. Cohn, Jiang, Kampczyk, Kartaltepe, Kauffmann, Kitzbichler, Klypin, Komatsu, Kravtsov, Lacey, Lacey, Li, Lin, Lotz, Lotz, Madau, Maller, Martin White, Maulbetsch, McIntosh, Mo, Moore, Murali, Naab, Navarro, Neto, Noguchi, Ouchi, Patton, Peacock, Percival, Reed, Robertson, Sanders, Saro, Seljak, Sheth, Smoot, Somerville, Springel, Springel, Springel, Steidel, Stewart, Tacconi, Taylor, Tegmark, Thacker, Toomre, Tormen, Tormen, Vale, van den Bosch, Wang, Wang, Wetzel, Wetzel, White, White, White, Yamauchi, Yang, Yoshida, Zentner, Zhang   +112 more
core   +3 more sources

An Integral Field Study of Abundance Gradients in Nearby LIRGs [PDF]

, 2012
We present for the first time metallicity maps generated using data from the Wide Field Spectrograph (WiFeS) on the ANU 2.3m of 9 Luminous Infrared Galaxies (LIRGs) and discuss the abundance gradients and distribution of metals in these systems.
Dopita, M. A., Kewley, L. J., Rich, J. A., Rupke, D. S. N., Torrey, P.   +4 more
core   +2 more sources

Resolving discs and mergers in z ∼ 2 heavily reddened quasars and their companion galaxies with ALMA [PDF]

, 2021
M. Banerji, Gareth C. Jones, Stefano Carniani, Colin DeGraf, Jeff Wagg   +4 more
openalex   +1 more source

Multitarget Recognition of Flower Images Based on Lightweight Deep Neural Network and Transfer Learning

Advanced Intelligent Systems, EarlyView.
This article proposes a lightweight YOLOv4‐based detection model using MobileNetV3 or CSPDarknet53_tiny, achieving 30+ FPS and higher mAP. It also presents a ShuffleNet‐based classification model with transfer learning and GAN‐augmented images, improving generalization and accuracy.
Qingyang Liu, Yanrong Hu, Hongjiu Liu
wiley   +1 more source

A library of galaxy mergers

, 2003
2 pages, 2 figures, contribution in Scientific Highlights, SF2A-2003, to be published by EDP ...
Combes, F., Melchior, A. -L.
openaire   +2 more sources

Close Pairs as Proxies for Galaxy Cluster Mergers

, 2008
Galaxy cluster merger statistics are an important component in understanding the formation of large-scale structure. Unfortunately, it is difficult to study merger properties and evolution directly because the identification of cluster mergers in ...
A. E. Schulz, Andrew R. Wetzel, Cole S., Daniel E. Holz, Efstathiou G., Gao L., Gao L., Lacey C., Michael S. Warren, Mo H. J., Sheth R. K.   +10 more
core   +1 more source

Numerical simulations of dwarf galaxy merger trees [PDF]

, 2014
We investigate the evolution of dwarf galaxies using N -body/SPH simulations that incorporate their formation histories through merger trees constructed using the ex- tended Press-Schechter formalism.
Cloet-Osselaer, Annelies, De Rijcke, Sven, Koleva, Mina, Schroyen, Joeri, Vandenbroucke, Bert, Verbeke, Robbert   +5 more
core   +3 more sources

Logarithmic and Strong Coupling Models in Weyl‐Type f(Q,T)$f(Q,T)$ Gravity

Annalen der Physik, EarlyView.
This work explores Weyl‐type f(Q,T) gravity using recent observational datasets — CC, Pantheon+, Union 3.0, and DESI DR2. Through MCMC analysis of logarithmic and strong coupling models, the study reveals a transition from deceleration to acceleration, quintessence‐to‐phantom dynamics, and late‐time consistency with LCDM, offering a geometry‐driven ...
Rahul Bhagat, S. K. Tripathy, B. Mishra
wiley   +1 more source