Results 101 to 110 of about 29,686 (260)

Mimicking Symmetry‐Breaking Einstein Ring by Optical Lens

Advanced Photonics Research, Volume 6, Issue 6, June 2025.
This article uses an optical lens to emulate the gravitational lensing effect and observe the Einstein ring (ER) patterns. The symmetry‐breaking ER, i.e., Einstein cross, is observed utilizing a rotation‐symmetry‐breaking hemi‐ellipsoid lens. Deformed Einstein cross patterns induced by noncollinearly alignment of the light source–lens–observer are ...
Jun‐Liang Duan, Wen Xiao, Minyong Guo, Tong Liu, Huanyang Chen, Jin‐Hui Chen   +5 more
wiley   +1 more source

The luminosities of the brightest cluster galaxies and brightest satellites in SDSS groups

, 2012
We show that the distribution of luminosities of Brightest Cluster Galaxies in an SDSS-based group catalog suggests that BCG luminosities are just the statistical extremes of the group galaxy luminosity function.
Aseem Paranjape, Bautz, Berlind, Bernardi, Bernardi, Bhavsar, Blanton, Cooray, De Lucia, Dobos, Hansen, Hubble, Lin, Loh, Milosavljević, Ravi K. Sheth, Sandage, Schechter, Scott, Sheth, Sheth, Skibba, Tremaine, Yang, Zehavi, Zehavi   +25 more
core   +1 more source

Silicosarcoidosis: Histologic and Clinical Features of an Occupational Granulomatous Disease

American Journal of Industrial Medicine, Volume 68, Issue 6, Page 491-507, June 2025.
ABSTRACT Sarcoidosis is a multisystem inflammatory disease of unknown etiology. Growing evidence indicates that occupational exposure to respirable crystalline silica (RCS) is associated with an increased incidence of sarcoidosis. Yet a diagnosis of sarcoidosis rarely prompts investigation to identify preventable exposures.
Jeremy T. Hua, Carlyne D. Cool, Einat Fireman Klein, Yochai Adir, Lukas J. Lee, Lauren M. Zell‐Baran, Robert A. Cohen, Richard C. Kraus, E. Brigitte Gottschall, Silpa D. Krefft, Charles Van Hook, Cecile S. Rose   +11 more
wiley   +1 more source

The Intracluster Light of Abell 3667: Unveiling an Optical Bridge in LSST Precursor Data

The Astrophysical Journal Letters
Intracluster light (ICL), the diffuse glow of stars stripped from galaxies during a cluster’s formation, is an established tracer of a cluster’s dynamical history. The upcoming Vera C.
Anthony M. Englert, Ian Dell’Antonio, Mireia Montes   +2 more
doaj   +1 more source

The luminosity function of cluster galaxies. II. Data reduction procedures applied to the cluster Abell 496 [PDF]

, 1999
We initiated a large project aimed to estimate the Luminosity Function of galaxies in clusters and to evaluate its relation to cluster morphology. With this paper we deem necessary to outline the general procedures of the data reduction and details of ...
Chincarini, G., De Grandi, S., Molinari, E., Moretti, A.   +3 more
core   +2 more sources

Redshift‐Agnostic Machine Learning Classification: Unveiling Peak Performance in Galaxy, Star, and Quasar Classification (Using SDSS DR17)

Astronomische Nachrichten, Volume 346, Issue 5, June 2025.
ABSTRACT Classification of galaxies, stars, and quasars using spectral data is fundamental to astronomy, but often relies heavily on redshift. This study evaluates the performance of 10 machine learning algorithms on SDSS data to classify these objects, with a particular focus on scenarios where redshift information is unavailable.
Debashis Chatterjee, Prithwish Ghosh
wiley   +1 more source

Evolution of Massive Red Galaxies in Clusters from z = 1.0 to z = 0.3

The Astronomical Journal
A critical issue in studying the evolution of galaxy clusters is to find ways that enable meaningful comparisons of clusters observed at different redshifts, as well as in various stages of their growth.
Yen-Ting Lin, Kai-Feng Chen, Tsung-Chi Chen, Chen-Yu Chuang, Masamune Oguri   +4 more
doaj   +1 more source

A Slowly Pulsating Run‐Away B Star at High Galactic Latitude Ejected From a Spiral Arm

Astronomische Nachrichten, Volume 346, Issue 5, June 2025.
ABSTRACT We report the discovery of the young B6 V run‐away star LAMOST J083323.18 + 430825.4, 2.5 kpc above the Galactic plane. Its atmospheric parameters and chemical composition are determined from LAMOST spectra, indicating normal composition. Effective temperature (Teff$$ {T}_{\mathrm{eff}} $$ = 14,500$$ \mathrm{14,500} $$ K) and gravity (logg ...
Ulrich Heber, Maximilian Halenke, Aakash Bhat, Veronika Schaffenroth   +3 more
wiley   +1 more source

Reexamination of the CO Absorption Line in the M87 Nucleus

The Astrophysical Journal
We analyzed the archival Atacama Large Millimeter/submillimeter Array data of the nuclear region of M87 and evaluated the molecular gas content from the CO(2–1) absorption line.
Norita Kawanaka, Hiroshi Nagai, Yutaka Fujita   +2 more
doaj   +1 more source

The Growth in Size and Mass of Cluster Galaxies since z=2

, 2013
We study the formation and evolution of Brightest Cluster Galaxies starting from a $z=2$ population of quiescent ellipticals and following them to $z=0$.
Gao, Liang, Laporte, Chervin F. P., Naab, Thorsten, White, Simon D. M.   +3 more
core   +1 more source