Results 91 to 100 of about 170,202 (384)

Evidence for a Shallow Evolution in the Volume Densities of Massive Galaxies at z = 4–8 from CEERS

The Astronomical Journal
We analyze the evolution of massive (log _10 [ M _⋆ / M _⊙ ] > 10) galaxies at z ∼ 1–4 selected from JWST Cosmic Evolution Early Release Survey (CEERS). We infer the physical properties of all galaxies in the CEERS NIRCam imaging through spectral energy ...
Katherine Chworowsky, Steven L. Finkelstein, Michael Boylan-Kolchin, Elizabeth J. McGrath, Kartheik G. Iyer, Casey Papovich, Mark Dickinson, Anthony J. Taylor, L. Y. Aaron Yung, Pablo Arrabal Haro, Micaela B. Bagley, Bren E. Backhaus, Rachana Bhatawdekar, Yingjie Cheng, Nikko J. Cleri, Justin W. Cole, M. C. Cooper, Luca Costantin, Avishai Dekel, Maximilien Franco, Seiji Fujimoto, Christopher C. Hayward, Benne W. Holwerda, Marc Huertas-Company, Michaela Hirschmann, Taylor A. Hutchison, Anton M. Koekemoer, Rebecca L. Larson, Zhaozhou Li, Arianna S. Long, Ray A. Lucas, Nor Pirzkal, Giulia Rodighiero, Rachel S. Somerville, Brittany N. Vanderhoof, Alexander de la Vega, Stephen M. Wilkins, Guang Yang, Jorge A. Zavala   +38 more
doaj   +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

Tracing Galaxy Evolution by Their Present-Day Luminosity Function

Open Astronomy, 2011
Galaxy luminosity functions are derived for different morphological types and various colors of galaxies, to trace the evolutionary effects which a priori should be different for void and supercluster galaxies.
Tempel E.
doaj   +1 more source

Properties of Globular Clusters in Galaxy Clusters: Sensitivity from the Formation and Evolution of Globular Clusters [PDF]

, 2022
So-Myoung Park, Jihye Shin, R. J. E. Smith, Kyungwon Chun   +3 more
openalex   +1 more source

Quantum GraviElectro Dynamics

Annalen der Physik, EarlyView.
The BRST invariant Lagrangian of the gravitationally interacting U(1)$U(1)$ gauge theory, namely the Quantum GraviElectro Dynamics (QGED). The Yan–Mills theory with the Hilbert–Einstein gravitational Lagrangian, namely the Yang–Mills–Utiyama (YMU) theory, is defined and quantised using the standard procedure. The theory is perturbatively renormalisable,
Yoshimasa Kurihara
wiley   +1 more source

And the winner is: galaxy mass

, 2011
The environment is known to affect the formation and evolution of galaxies considerably best visible through the well-known morphology-density relationship.
A Dressler, A Pasquali, B Rogers, CJ Lintott, D Thomas, D Thomas, D Thomas, DG York, H Kuntschner, IK Baldry, K Schawinski, LAM Tasca, M Cappellari, M Postman, M Sarzi, YJ Peng   +15 more
core   +1 more source

Simulations of galaxy formation and evolution [PDF]

Astronomische Nachrichten, 2012
AbstractWe discuss recent results of hydrodynamical simulations of galaxy formation in a Λ Cold Dark Matter universe, focusing on galaxies of similar mass to the Milky Way, and with a variety of formation and merger histories. We investigate the present‐day properties of disks and spheroids, in terms of stellar ages, spatial structure and dynamics; as ...
openaire   +1 more source

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

The evolution of the colour-magnitude relation and of the star formation activity in galaxy clusters since z~0.8

, 2008
We present recent results on the evolution of the colour-magnitude relation and of the star formation activity in galaxy clusters since z~0.8. Results are based on the ESO Distant Cluster Survey (EDisCS) - an ESO large programme aimed at the study of ...
De Lucia, Gabriella, Poggianti, Bianca M.   +1 more
core  

Collision-induced galaxy formation: semi-analytical model and multi-wavelength predictions

, 2003
A semi-analytic model is proposed that couples the Press-Schechter formalism for the number of galaxies with a prescription for galaxy-galaxy interactions that enables to follow the evolution of galaxy morphologies along the Hubble sequence.
Balland, Christophe, Devriendt, Julien E. G., Silk, Joe   +2 more
core   +3 more sources