Results 201 to 210 of about 341,567 (228)
Disk galaxies and their environment
Astronomische Nachrichten, 2009 AbstractEnvironments of disk‐dominated galaxies and simple disk systems‐compared to systems with bulges‐provide a means to explore how environment relates to galaxy morphology. Our approach focuses on systems with edge‐on disks where disk‐to‐bulge ratios and disk flattening can be unambiguously determined and focuses on simple disks as evolutionary ...
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DENSITY WAVES IN DISK GALAXIES
Symposium - International Astronomical Union, 1967Density waves in the nature of those proposed by B. Lindblad are described by detailed mathematical analysis of collective modes in a disk-like stellar system. The treatment is centered around a hypothesis of quasi-stationary spiral structure. We examine (a) the mechanism for the maintenance of this spiral pattern, and (b) its consequences on the ...
C. C. Lin, F. H. Shu
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Galaxy disks and disk galaxies
2001This volume presents the proceedings of the conference "Galaxy Disks and Disk Galaxies", sponsored by the Vatican Observatory. The meeting was held in Rome from 12 to 16 June, 2000, the Jubilee Year, a special year for the Catholic Church. The venue of the meeting was the Pontifical Gregorian University, a descendant of the former Roman College where ...
FUNES J. G., CORSINI, ENRICO MARIA
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1992
In this review, I will concentrate on the observational aspects of the dynamical evolution of the disk population. First I will discuss some general properties of disks, such as their structure and kinematics and the thick disks. The next section is on the kinematical properties of the galactic disk near the sun, including some important new results on
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In this review, I will concentrate on the observational aspects of the dynamical evolution of the disk population. First I will discuss some general properties of disks, such as their structure and kinematics and the thick disks. The next section is on the kinematical properties of the galactic disk near the sun, including some important new results on
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Counterrotating Galaxies and Accretion Disks
Annals of the New York Academy of Sciences, 1998ABSTRACT:Theoretical interest in astrophysical disks with counterrotating components of stars and/or gas has been stimulated by recently discovered counterrotating spiral and S0 galaxies. A variety of physical processes can occur in counterrotating disks.
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1997
As astronomers involved in studies of interstellar dust in various environments are about to head into ISO’s decade, it seems to me both a good and a risky idea to try and summarize our current knowledge of the properties of dust in galactic disks. Indeed it is always interesting to sort out our various findings to see which questions were answered ...
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As astronomers involved in studies of interstellar dust in various environments are about to head into ISO’s decade, it seems to me both a good and a risky idea to try and summarize our current knowledge of the properties of dust in galactic disks. Indeed it is always interesting to sort out our various findings to see which questions were answered ...
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On the Phenomenology of Disk Galaxies
1997Using multifrequency observations, from the radio (21 cm line) to the UV (λ 2000 A) of 928 nearby ...
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Photometry of Disks in Galaxies
1989In this review, four aspects of the light distribution in galactic disks are addressed: (1) Following the pioneering work by de Vaucouleurs in the 1950’s, we know that the majority of disks have a radial surface brightness distribution that follows an exponential law.
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Rotating Disk Galaxies without Dark Matter Based on Scientific Reasoning
Galaxies, 2020James Feng
exaly