Results 111 to 120 of about 11,134,879 (212)

How Dust Models Shape High-z Galaxy Morphology: Insights from the NewCluster Simulation

The Astrophysical Journal
Dust plays a pivotal role in shaping the observed morphology of galaxies. While traditional cosmological simulations often assume a fixed dust-to-gas or dust-to-metal (DTM) mass ratio to model dust effects, recent advancements have enabled on-the-fly ...
Gyeong-Hwan Byun, J. K. Jang, Zachary P. Scofield, Eunmo Ahn, Maarten Baes, Yohan Dubois, San Han, Seyoung Jeon, Juhan Kim, Christophe Pichon, Jinsu Rhee, Francisco Rodríguez Montero, Sukyoung K. Yi   +12 more
doaj   +1 more source

The Hot and Energetic Universe:The evolution of galaxy groups and clusters [PDF]

, 2013
Major astrophysical questions related to the formation and evolution of structures, and more specifically of galaxy groups and clusters, will still be open in the coming decade and beyond: what is the interplay of galaxy, supermassive black hole, and ...
Bourdin, H., Maughan, B., Molendi, S., Mohr, J., von der Linden, A., Borgani, S., Sanders, J., Biffi, V., Dolag, K., H. Reiprich, T., Clerc, N., Smith, R., Springel, V., Arnaud, M., Brueggen, M., Finoguenov, A., Hoekstra, H., Hildebrandt, H., Marrone, D., Pointecouteau, E., Rasia, E., Boehringer, H., Romer, K., Schwope, A., Mazzotta, P., de Plaa, J., Nevalainen, J., Pierre, M., Borm, K., W. Pratt, G., Kaastra, J., Schrabback, T., Allen, S., Fassbender, R., Schindler, S., Ramos-Ceja, M., Lovisari, L., Ohashi, T., Pacaud, F., Adami, C., Elbaz, D., Bulbul, E., Ota, N., H. Croston, J., -Y. Zhang, Y., Brunetti, G., Ettori, S., Lamer, G.   +47 more
core  

Galaxies Going Bananas: Inferring the 3D Geometry of High-redshift Galaxies with JWST-CEERS

The Astrophysical Journal
The 3D geometries of high-redshift galaxies remain poorly understood. We build a differentiable Bayesian model and use Hamiltonian Monte Carlo to efficiently and robustly infer the 3D shapes of star-forming galaxies in James Webb Space Telescope Cosmic ...
Viraj Pandya, Haowen Zhang, Marc Huertas-Company, Kartheik G. Iyer, Elizabeth McGrath, Guillermo Barro, Steven L. Finkelstein, Martin Kümmel, William G. Hartley, Henry C. Ferguson, Jeyhan S. Kartaltepe, Joel Primack, Avishai Dekel, Sandra M. Faber, David C. Koo, Greg L. Bryan, Rachel S. Somerville, Ricardo O. Amorín, Pablo Arrabal Haro, Micaela B. Bagley, Eric F. Bell, Emmanuel Bertin, Luca Costantin, Romeel Davé, Mark Dickinson, Robert Feldmann, Adriano Fontana, Raphael Gavazzi, Mauro Giavalisco, Andrea Grazian, Norman A. Grogin, Yuchen Guo, ChangHoon Hahn, Benne W. Holwerda, Lisa J. Kewley, Allison Kirkpatrick, Dale D. Kocevski, Anton M. Koekemoer, Jennifer M. Lotz, Ray A. Lucas, Casey Papovich, Laura Pentericci, Pablo G. Pérez-González, Nor Pirzkal, Swara Ravindranath, Caitlin Rose, Marc Schefer, Raymond C. Simons, Amber N. Straughn, Sandro Tacchella, Jonathan R. Trump, Alexander de la Vega, Stephen M. Wilkins, Stijn Wuyts, Guang Yang, L. Y. Aaron Yung   +55 more
doaj   +1 more source

Star–galaxy classification in deep LSST data with random forest

Astronomy & Astrophysics
Context. The Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST) will produce unprecedentedly deep and wide photometric catalogues, enabling transformative studies of faint stellar systems such as the research of ultra-faint dwarf (UFD ...
Gatto M., Ripepi V., Bellazzini M., Tortora C., Dall’Ora M.   +4 more
doaj   +1 more source

Automating Galaxy Image Classification in Galaxy Zoo:A Comparative Study of Deep Learning Models

This study compares the effectiveness of Artificial Neural Networks (ANNs) and Logistic Regression in classifying galaxy images from Galaxy Zoo 1. We propose Convolutional Neural Network (CNN) and Autoencoder models as potential solutions to mitigate the
Chiew, Soon Piin, Liau, Chung Fan, Farzamnia, Ali; id_orcid   +2 more
core   +1 more source

Katachi (形): Decoding the Imprints of Past Star Formation on Present-day Morphology in Galaxies with Interpretable CNNs

The Astrophysical Journal
The physical processes responsible for shaping how galaxies form and quench over time leave imprints on both the spatial (galaxy morphology) and temporal (star formation history; SFH) tracers that we use to study galaxies.
Juan Pablo Alfonzo, Kartheik G. Iyer, Masayuki Akiyama, Greg L. Bryan, Suchetha Cooray, Eric Ludwig, Lamiya Mowla, Kiyoaki C. Omori, Camilla Pacifici, Joshua S. Speagle, John F. Wu   +10 more
doaj   +1 more source

The morphologies of distant galaxies. 1: an automated classification system

The Astrophysical Journal, 1994
Roberto G. Abraham, Francisco Valdes, H. K. C. Yee, Sidney van den Bergh   +3 more
openaire   +1 more source

Mass-to-light ratio of galaxy systems

, 2002
We study the mass-to-light ratio of galaxy systems from poor groups to rich clusters. We extend a previous work based on 89 clusters obtaining blue luminosity and virial mass for other 52 clusters, 43 poor systems, and similar to 500 groups of two ...
G. Giuricin, P. Manzato, F. Limboz, MEZZETTI, MARINO, GIRARDI, MARISA   +4 more
core  

Secondary evolution of galaxies investigated by N-body simulations [PDF]

, 2008
In the ΛCDM cosmology, merging is one of the most important physical processes that drives the formation and evolution of galaxies. In the present work, we use N-body techniques to investigate some of currently open issues related to the formation and ...
Coppola, Giuseppina
core   +1 more source

Identification and Analysis of Galactic Bars in DESI Legacy Imaging Surveys

The Astrophysical Journal
We present a comprehensive study of bar structures in the local universe using data from the DESI Legacy Imaging Surveys. Through isophotal analysis of 232,142 galaxies, we identify bars and classify them into strong and weak categories based on ...
Wenwen Wang, Zhimin Zhou
doaj   +1 more source