Results 141 to 150 of about 482,012 (314)

A minor merger origin for stellar inner discs and rings in spiral galaxies [PDF]

, 2011
Context. Observations have shown that inner discs and rings (IDs and IRs) are not preferably found in barred galaxies, which indicates that their formation may differ from that described by the traditional bar-origin scenario in many cases.
M. C. Eliche-Moral, A. C. González-García, A. C. González-García, A. C. González-García, M. Balcells, M. Balcells, J. Aguerri, J. Aguerri, Jesús Gallego, J. Zamorano, M. Prieto, M. Prieto   +11 more
semanticscholar   +1 more source

Determining the parameters of the spiral arms of the Galaxy from kinematic tracers based on Gaia DR3 data [PDF]

, 2023
S. I. Denyshchenko, P. N. Fedorov, V. S. Akhmetov, A. B. Velichko, Artem Dmytrenko   +4 more
openalex   +1 more source

Dynamic Chiral Plasmonic Systems‐Based on Spiropyran Derivatives and Gold Nanorods

Advanced Materials Interfaces, Volume 12, Issue 23, December 8, 2025.
Soft chiral plasmonic nanocomposites are prepared by embedding gold nanorods into spiropyran‐based supramolecular gels. The system self‐assembles into helical structures, enabling plasmonic circular dichroism. When illuminated with UV light spiropyran–merocyanine isomerization occurs, inducing reversible nanoscale reorganization and modulation of the ...
Ewelina Tomczyk, Maciej Bagiński, Dorota Szepke, Wiktor Lewandowski, Michał Wójcik   +4 more
wiley   +1 more source

On the Role of Noncircular Motions in MaNGA Galaxies. I. Global Properties

The Astrophysical Journal
Noncircular (NC) motions represent the imprints of nonaxisymmetric structures in galaxies, providing opportunities to study the physical properties of gas departing from circular rotation.
Carlos López-Cobá, Lihwai Lin, Justus Neumann, Matthew A. Bershady   +3 more
doaj   +1 more source

Discovery of a very extended X-ray halo around a quiescent spiral galaxy - the "missing link" of galaxy formation

, 2005
Hot gaseous haloes surrounding galaxies and extending well beyond the distribution of stars are a ubiquitous prediction of galaxy formation scenarios.
Benson, Andrew J., Bower, Richard G., Pedersen, Kristian, Rasmussen, Jesper, Sommer-Larsen, Jesper, Toft, Sune   +5 more
core   +1 more source

TESTING THEORIES IN BARRED-SPIRAL GALAXIES [PDF]

, 2011
According to one version of the recently proposed “manifold” theory that explains the origin of spirals and rings in relation to chaotic orbits, galaxies with stronger bars should have a higher spiral arms pitch angle when compared to galaxies with ...
E. E. Mart'inez-Garc'ia
semanticscholar   +1 more source

The possible evolution of pitch angles of spiral galaxies [PDF]

, 2023
В. П. Решетников, Alexander A. Marchuk, Ilia V. Chugunov, P. Usachev, А. В. Мосенков   +4 more
openalex   +1 more source

The Impacts of Bars, Spirals, and Bulge Size on Gas-phase Metallicity Gradients in MaNGA Galaxies

The Astrophysical Journal
As galaxies evolve over time, the orbits of their constituent stars are expected to change in size and shape, moving stars away from their birth radius. Radial gas flows are also expected. Spiral arms and bars in galaxies are predicted to help drive this
M. E. Wisz, Karen L. Masters, Kathryne J. Daniel, David V. Stark, Francesco Belfiore   +4 more
doaj   +1 more source

Polygonal Structures in the Gaseous Disk: Numerical Simulations

, 2011
The results of numerical simulations of a gaseous disk in the potential of a stellar spiral density wave are presented. The conditions under which straightened spiral arm segments (rows) form in the gas component are studied. These features of the spiral
A. D. Chernin, A. D. Chernin, A. D. Chernin, A. D. Chernin, A. D. Chernin, A. D. Chernin, A. D. Chernin, A. D. Chernin, A. Harten, A. Khoperskov, A. V. Khoperskov, A. V. Khoperskov, A. V. Zasov, A.V. Khoperskov, B. A. Vorontsov-Vel’yaminov, B. A. Vorontsov-Vel’yaminov, B. G. Elmegreen, B. G. Elmegreen, B. Leer van, C. L. Dobbs, Ch.-G. Kim, D. P. Cox, G. Contopoulous, I. A. Acharova, K. Muraoka, K. Wada, K. Wada, M. A. Butenko, M. A. Eremin, M. A. Eremin, M. A. Vigne la, M. Pohlen, O. K. Sil’chenko, P. A. Patsis, P. Grosbol, P. Rautiainen, R. Buta, R. Buta, R. J. Buta, R. Shetty, R. Shetty, S. A. Khoperskov, S. Chakrabarti, W. H. Waller, W.S. Dias, X. Zhang, Yu. N. Efremov, Yu. N. Efremov, Yu. N. Efremov, Yu. N. Efremov, Yu. N. Mishurov   +50 more
core   +1 more source

Forces Attributed to Dark Matter May Originate from Entangled Particles as Seen in the Shape Of Galaxies Formed by Grbs

International Journal of Engineering and Management Sciences, 2018
Recently, it has been suggested that entangled particles may be connected by a wormhole. If that is right, what is the distance between them we have to take into account when applying Newton's law of universal gravitation to these particles?
Sándor Buglyó
doaj   +1 more source