Results 271 to 280 of about 470,379 (288)

On the Response of Proteinoid Ensembles to Fibonacci Sequences. [PDF]

ACS Omega
Mougkogiannis P, Adamatzky A.
europepmc   +1 more source

Observation of vortex-pair dance and oscillation. [PDF]

Sci Adv
Liu D, Chen L, Wang LG.
europepmc   +1 more source

Tidal tail identification and detailed analysis of the open star cluster King 13 using Gaia DR3 and 2MASS. [PDF]

Sci Rep
Ahmed NM, Darwish MS.
europepmc   +1 more source

Kimura's contributions on Earth polar motion studies. [PDF]

Proc Jpn Acad Ser B Phys Biol Sci
Iye M.
europepmc   +1 more source

The Rotation of Spiral Galaxies [PDF]

Science, 1983
There is accumulating evidence that as much as 90 percent of the mass of the universe is nonluminous and is clumped, halo-like, around individual galaxies. The gravitational force of this dark matter is presumed to be responsible for the high rotational velocities of stars and gas in the disks of spiral galaxies.
openaire   +2 more sources

Opaque spiral galaxies [PDF]

Nature, 1990
The photographic images of a carefully selected sample of about 16,000 galaxies have been digitized, and an extensive set of photometric parameters has been determined. These data allow a reanalysis of the effective transparency using the measured surface brightness profiles for much larger, more strictly defined samples. Several tests provide evidence
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Spirals in galaxies

Proceedings of the International Astronomical Union, 2019
AbstractThe venerable problem of what causes the spiral features in disk galaxies is nearing a solution. In previous work, we have shown that transient spirals in simulations result from the superposition of a few coherent waves that have many properties of modes.
openaire   +2 more sources

A repeating fast radio burst source localized to a nearby spiral galaxy

Nature, 2020
Fast radio bursts (FRBs) are brief, bright, extragalactic radio flashes1,2. Their physical origin remains unknown, but dozens of possible models have been postulated3. Some FRB sources exhibit repeat bursts4–7.
B. Marcote, K. Nimmo, K. Nimmo, J. Hessels, J. Hessels, S. Tendulkar, C. Bassa, Z. Paragi, A. Keimpema, M. Bhardwaj, R. Karuppusamy, V. Kaspi, C. Law, D. Michilli, K. Aggarwal, B. Andersen, A. Archibald, A. Archibald, K. Bandura, G. Bower, P. Boyle, C. Brar, S. Burke-Spolaor, B. Butler, T. Cassanelli, P. Chawla, P. Demorest, M. Dobbs, E. Fonseca, U. Giri, U. Giri, D. Good, K. Gourdji, A. Josephy, A. Kirichenko, A. Kirichenko, F. Kirsten, T. Landecker, D. Lang, T. Lazio, D. Li, H.-H. Lin, J. Linford, K. Masui, J. Mena-Parra, A. Naidu, C. Ng, C. Patel, Ue-Li Pen, Z. Pleunis, M. Rafiei-Ravandi, Mubdi Rahman, A. Renard, P. Scholz, P. Scholz, S. Siegel, Kendrick M. Smith, I. Stairs, K. Vanderlinde, A. Zwaniga   +59 more
semanticscholar   +1 more source

DYNAMICS OF SPIRAL GALAXIES

Frontiers of Applied Mathematics, 2007
The dynamics of spiral galaxies is a gold-mine of challenging problems for the astrophysicist and the applied mathematician. In Astrophysics, we may ask how these island-universes formed, evolved, and reached their current structure and thus address the problems of the dynamics of the interstellar medium, of star formation, of stellar dynamics, and of ...
openaire   +3 more sources

Magnetism of spiral galaxies

Nature, 1988
The concept of the turbulent dynamo in interstellar gas combined with the discovery of global magnetic structures in spiral galaxies has led to a consistent picture of galactic magnetism. Large-scale magnetic fields are generated and maintained by helical turbulent motions of interstellar gas and by differential galactic rotation.
Anvar Shukurov, Dmitry Sokoloff, Alexander Ruzmaikin   +2 more
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