Results 111 to 120 of about 526 (138)

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   +1 more source

Dark matter in spiral galaxies

Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1986
Abstract Mass models of spiral galaxies based on the observed light distribution, assuming constant M /L for bulge and disc, are able to reproduce the observed rotation curves in the inner regions, but fail to do so increasingly towards and beyond the edge of the visible material.
VANALBADA, TS, SANCISI, R
openaire   +2 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.
Alexander Ruzmaikin, Dmitry Sokoloff, Anvar Shukurov   +2 more
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Experimental study on the heat transfer characteristics of supercritical carbon dioxide in spiral tube with high pitch to spiral diameter ratio

International Journal of Heat and Mass Transfer, 2023
Yong-Le Nian, Wenlong Cheng
exaly  

Comparison of the Galaxy with External Spiral Galaxies

1987
In this chapter some areas of comparative exploration in our and external galaxies are reviewed and discussed. Photometric parameters for the Galaxy are derived. The radial scalelength is 5.0 ± 0.5 kpc, and this makes our Galaxy (and M31) unusually large unless Ho = 65 ± 10 km s−1 Mpc−1. Surface photometry of external edge-on galaxies, in particular of
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Vortices degradation and periodical variation in spiral micromixers with various spiral structures

International Journal of Heat and Mass Transfer, 2022
Yukui Cai, Bing Wang, Yi Wan
exaly  

Formation of a spiral galaxy

ACM SIGGRAPH 2007 computer animation festival, 2007
openaire   +1 more source

Spiral wound modules and spacers

Journal of Membrane Science, 2004
D F Fletcher, A G Fane, P R Neal
exaly  

Vertically Conductive MoS2 Spiral Pyramid

Advanced Materials, 2016
Young Hee Lee, Thuc Hue Ly, Jiong Zhao
exaly  

Spiral wave chimera in two-dimensional nonlocally coupled Fitzhugh–Nagumo systems

Chaos, Solitons and Fractals, 2018
Qionglin Dai, Shuangjian Guo, Fagen Xie   +2 more
exaly