Results 1 to 10 of about 148 (109)

On the plausible origins of the spiral character of galaxies

Open Astronomy, 2021
We here-in demonstrate that the proposed hitherto unknown gravitomagnetic dark-force that hypothetically explains the Flat Rotation Curves of Spiral Galaxies — this same force, explains very well, the logarithmic and as-well, the barred spiral shapes of ...
Nyambuya Golden Gadzirayi
doaj   +1 more source

Mechanisms based on chaotic flows that support structures in barred-spiral systems

EPJ Web of Conferences, 2012
I summarize the dynamical mechanisms that have been found to shape structures such as the spirals and the bars in barred-spiral systems. Response models and orbital analysis are used to study the dynamics in potentials estimated from near-infrared images
Patsis P.A.
doaj   +1 more source

Formation of Major Types of Galaxies Based on the Energy Circulation Theory

Reports in Advances of Physical Sciences, 2022
The standard cosmology can answer almost nothing about how the structure of a galaxy is formed. It expects a supermassive black hole at the center and dark matter in the halo to explain the circulation of stars and its velocity.
Shigeto Nagao
doaj   +1 more source

PHANGS–JWST First Results: Interstellar Medium Structure on the Turbulent Jeans Scale in Four Disk Galaxies Observed by JWST and the Atacama Large Millimeter/submillimeter Array

The Astrophysical Journal Letters, 2023
JWST/Mid-Infrared Instrument imaging of the nearby galaxies IC 5332, NGC 628, NGC 1365, and NGC 7496 from PHANGS reveals a richness of gas structures that in each case form a quasi-regular network of interconnected filaments, shells, and voids.
Sharon E. Meidt, Erik Rosolowsky, Jiayi Sun, Eric W. Koch, Ralf S. Klessen, Adam K. Leroy, Eva Schinnerer, Ashley. T. Barnes, Simon C. O. Glover, Janice C. Lee, Arjen van der Wel, Elizabeth J. Watkins, Thomas G. Williams, F. Bigiel, Médéric Boquien, Guillermo A. Blanc, Yixian Cao, Mélanie Chevance, Daniel A. Dale, Oleg V. Egorov, Eric Emsellem, Kathryn Grasha, Jonathan D. Henshaw, J. M. Diederik Kruijssen, Kirsten L. Larson, Daizhong Liu, Eric J. Murphy, Jérôme Pety, Miguel Querejeta, Toshiki Saito, Karin M. Sandstrom, Rowan J. Smith, Mattia C. Sormani, David A. Thilker   +33 more
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Comparison of physical characteristics of mass and luminosity function of disk systems in barred and unbarred spiral galaxies

مجلة بغداد للعلوم
Among the most important ways to investigate galaxies' distribution over cosmic time is the luminosity function LF in terms of baryonic disc mass ψS(Mb), magnitude  .
Al Najm M.N., Y. E. Rashed , H. H. AL-Dahlaki   +2 more
doaj   +1 more source

PHANGS–JWST First Results: Rapid Evolution of Star Formation in the Central Molecular Gas Ring of NGC 1365

The Astrophysical Journal Letters, 2023
Large-scale bars can fuel galaxy centers with molecular gas, often leading to the development of dense ringlike structures where intense star formation occurs, forming a very different environment compared to galactic disks.
Eva Schinnerer, Eric Emsellem, Jonathan D. Henshaw, Daizhong Liu, Sharon E. Meidt, Miguel Querejeta, Florent Renaud, Mattia C. Sormani, Jiayi Sun, Oleg V. Egorov, Kirsten L. Larson, Adam K. Leroy, Erik Rosolowsky, Karin M. Sandstrom, T. G. Williams, Ashley. T. Barnes, F. Bigiel, Mélanie Chevance, Yixian Cao, Rupali Chandar, Daniel A. Dale, Cosima Eibensteiner, Simon C. O. Glover, Kathryn Grasha, Stephen Hannon, Hamid Hassani, Jaeyeon Kim, Ralf S. Klessen, J. M. Diederik Kruijssen, Eric J. Murphy, Justus Neumann, Hsi-An Pan, Jérôme Pety, Toshiki Saito, Sophia K. Stuber, Robin G. Treß, Antonio Usero, Elizabeth J. Watkins, Bradley C. Whitmore, PHANGS   +39 more
doaj   +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

Story2Board: A Training‐Free Approach for Expressive Visual Storytelling

Computer Graphics Forum, EarlyView.
Abstract We present Story2Board, a training‐free framework for expressive storyboard generation from natural language. Existing methods narrowly focus on subject identity, overlooking key aspects of visual storytelling such as spatial composition, background evolution, and narrative pacing.
D. Dinkevich, M. Levy, O. Avrahami, D. Samuel, D. Lischinski   +4 more
wiley   +1 more source

A New Statistical Analysis of the Morphology of Spiral Galaxies

The Astronomical Journal
Morphology is the starting point for understanding galaxies. Elmegreen et al. classified spiral galaxies into flocculent, multiple-arm, and grand-design galaxies based on the regularity of their spiral arm structure.
Junye Wei, Ye Xu, Zehao Lin, Chaojie Hao, Yingjie Li, Dejian Liu, Shuaibo Bian   +6 more
doaj   +1 more source

Cluster-centric trends in bar size and pattern speed: The case of Abell 2199

Astronomy & Astrophysics
Aims. We investigate how the environment of a dynamically unrelaxed galaxy cluster influences the structure and dynamics of stellar bars. In particular, we examine cluster-centric variations in normalised bar size and bar pattern speed in Abell 2199 ...
Watts Chandan, Barway Sudhanshu, Das Mousumi, Łokas Ewa L.   +3 more
doaj   +1 more source