Results 111 to 120 of about 12,959,376 (400)

Age Estimates for Galaxies in Groups [PDF]

International Astronomical Union Colloquium, 2000
AbstractWe discuss recent developments on the age and metallicity distribution for early type galaxies in different environments.
Forbes, Duncan A., Terlevich, Alejandro I.   +1 more
openaire   +2 more sources

Diversity and Ecological Potentials of Marine Viruses Inhabiting Continental Shelf Seas

Advanced Science, EarlyView.
To the best of the knowledge, this study provides the largest viral genome dataset from a continental shelf sea. It reveals that over half of vOTUs are novel, highlighting the remarkable viral novelty in the eastern continental shelf seas of China (ECSSC).
Xiaoyue Guo, Yantao Liang, Chen Gao, Hao Yu, Meiwen Wang, Hongbing Shao, Yeqing Yang, David Paez‐Espino, Andrew McMinn, Min Wang   +9 more
wiley   +1 more source

A Physically Motivated Framework to Compare Pair Fractions of Isolated Low- and High-mass Galaxies across Cosmic Time

The Astrophysical Journal
Low-mass galaxy pair fractions are understudied, and it is unclear whether low-mass pair fractions evolve in the same way as more massive systems over cosmic time. In the era of JWST, Roman, and Rubin, selecting galaxy pairs in a self-consistent way will
Katie Chamberlain, Gurtina Besla, Ekta Patel, Vicente Rodriguez-Gomez, Paul Torrey, Garreth Martin, Kelsey Johnson, Nitya Kallivayalil, David Patton, Sarah Pearson, George Privon, Sabrina Stierwalt   +11 more
doaj   +1 more source

Chandra view of Abell 407: the central compact group of galaxies and the interaction between the radio AGN and the ICM [PDF]

, 2022
Chao Qiang Geng, Chong Ge, D. Lal, Ming Sun, Li Ji, Haiguang Xu, Wenhao Liu, M. J. Hardcastle, W. Forman, Ralph Kraft, C. Jones   +10 more
openalex   +1 more source

The dependence of galaxy group star formation rates and metallicities on large‐scale environment [PDF]

, 2012
We construct a sample of 75,863 star forming galaxies with robust metallicity and star formation rate measurements from the Sloan Digital Sky Survey Data Release 7 (SDSS DR7), from which we select a clean sample of compact group (CG) galaxies.
J. Scudder, S. Ellison, J. Mendel
semanticscholar   +1 more source

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

The M31–M33 Interaction: Impact on M31’s Center-of-mass Motion and Satellite Orbits

The Astrophysical Journal
Inspired by recent studies of the interaction between the Milky Way and the Large Magellanic Cloud and its implications for the Milky Way’s global dynamical history, we investigate how the massive satellite galaxy M33 influences the position and velocity
Ekta Patel, Nicolás Garavito-Camargo, Ivanna Escala   +2 more
doaj   +1 more source

A Search for Gas-Rich Dwarf Galaxies in the Local Universe with ALFALFA and the WIYN One Degree Imager

The Astronomical Journal, 2023
We present results from an optical search for Local Group dwarf galaxy candidates associated with the Ultra-Compact High Velocity Clouds (UCHVCs) discovered by the ALFALFA neutral hydrogen survey.
Katherine L. Rhode, Nicholas J. Smith, William F. Janesh, John J. Salzer, Elizabeth A. K. Adams, Martha P. Haynes, Steven Janowiecki, John M. Cannon   +7 more
doaj   +1 more source

HOT AND COLD GALACTIC GAS IN THE NGC 2563 GALAXY GROUP [PDF]

, 2012
The role of environmentally induced gas stripping in driving galaxy evolution in groups remains poorly understood. Here we present extensive Chandra and Very Large Array mosaic observations of the hot and cold interstellar medium within the members of ...
J. Rasmussen, X. Bai, J. Mulchaey, J. Gorkom, T. Jeltema, A. Zabludoff, E. Wilcots, P. Martini, Duane M. Lee, T. Roberts, Juliane Maries   +10 more
semanticscholar   +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