Results 11 to 20 of about 2,487 (263)
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
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Formation of Disc Galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 1998 We investigate the influence of the cooling epoch on the formation of galaxies in a cold dark matter dominated universe. Isolated haloes, with circular speeds typical of spiral galaxies, have been selected from a low resolution numerical simulation for re-simulation at higher resolution with dark matter and gas components.
Weil, M. L., Eke, V. R., Efstathiou, G.
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Galaxy Zoo: bar lengths in local disc galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2011 We present an analysis of bar length measurements of 3150 local galaxies in a volume-limited sample of low-redshift (z < 0.06) disc galaxies. Barred galaxies were initially selected from the Galaxy Zoo 2 project, and the lengths and widths of the bars were manually drawn by members of the Galaxy Zoo community using a Google Maps interface. Bars were
Hoyle, Ben +9 more
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Monthly Notices of the Royal Astronomical Society, 1992 Bidimensional photometry is presented for 40 bright S0 galaxies with apparent flattening b 0 /a 0 ≥ 0.9 at the 25 mag arsec -2 level. They represent all of the bright S0s in the RC2 catalogue which are seen almost face-on and are sufficiently extended for detailed investigations to be possible.
G. Magrelli, D. Bettoni, G. Galletta
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The gravitational microlens influence on X-ray spectral line generated by an AGN accretion disc [PDF]
Serbian Astronomical Journal, 2001 The influence of gravitational microlensing on the X-ray spectral line profiles originated from a relativistic accretion disc has been studied. Using a disc model, we show that microlensing can induce noticeable changes in the line shapes when the ...
Popović L.Č. +4 more
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Thick Discs and the Formation of Disc Galaxies [PDF]
Symposium - International Astronomical Union, 1983 The formation of disc galaxies is generally believed to involve the dissipative collapse of primordial gas clouds, moving in the potentials of dark, self-gravitating massive halos. Until now, most theories have considered only spherically symmetric collapse, with the luminous disc being formed out of a plane of cold gas which is in centrifugal ...
Rosemary F. G. Wyse, Bernard J. T. Jones
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Forming disc galaxies in CDM simulations [PDF]
Monthly Notices of the Royal Astronomical Society, 2007 ISSN:0035 ...
Governato, F. +7 more
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Targeted decrease of portal hepatic pressure gradient improves ascites control after TIPS
Hepatology, EarlyView., 2022 The river diagram demonstrates that after transjugular intrahepatic portosystemic shunt insertion (TIPS) the majority of patients without ascites and 50% of the patients with ascites detectable at ultrasound, show the best response in the long term follow‐up.
Alexander Queck +14 more
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Entropy and Mass Distribution in Disc Galaxies
Galaxies, 2020 The relaxed motion of stars and gas in galactic discs is well approximated by a rotational velocity that is a function of radial position only, implying that individual components have lost any information about their prior states.
John Herbert Marr
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Angular Momentum Accretion onto Disc Galaxies [PDF]
Proceedings of the International Astronomical Union, 2018 AbstractThroughout the Hubble time, gas makes its way from the intergalactic medium into galaxies fuelling their star formation and promoting their growth. One of the key properties of the accreting gas is its angular momentum, which has profound implications for the evolution of, in particular, disc galaxies.
Fraternali, Filippo, Pezzulli, Gabriele
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