Results 101 to 110 of about 8,619 (182)
Stellar orbital dynamics of disk galaxies: I bars, II spiral arms. [PDF]
, 2019 I. Bars We investigate regular and chaotic two-dimensional (2D) and three-dimensional (3D) orbits of stars in models of a galactic potential consisting of a disk, a halo, and a bar to find the origin of boxy components that are part of the bar or (almost)
Luis Leonardo Chaves Velasquez
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DARK MATTER IN SPIRAL GALAXIES [PDF]
, 1990 The Tully-Fisher relation is used to probe dark matter (DM) in the optical regions of spiral galaxies. By establishing it at several different isophotal radii in an appropriate sample of 58 galaxies with good B-band photometry and rotation curves, we ...
PERSIC M +3 more
core +1 more source
Modelling neutral hydrogen discs of spiral galaxies [PDF]
, 2002 We present an analytical model of a neutral hydrogen disc in a spiral galaxy. The gas disc of the spiral galaxy is assumed to have an exponential surface density profile and to be ionized by the cosmic ultraviolet background. To compare with observations,
Lin, WP +3 more
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A multi-wavelength study of the dwarf galaxies NGC 2915 and NGC 1705 : star formation, gas dynamics and dark matter [PDF]
, 2010 Includes bibliographical references (p. 233-242).This thesis presents the results of a detailed multi-wavelength study of the nearby blue compact dwarf galaxies NGC 2915 and NGC 1705.
Elson, E C
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A New Statistical Analysis of the Morphology of Spiral Galaxies [PDF]
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 +6 more
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Aperture corrections for disk galaxy properties derived from the CALIFA survey: Balmer emission lines in spiral galaxies [PDF]
, 2013 This work investigates the effect of the aperture size on derived galaxy properties for which we have spatially-resolved optical spectra.We focus on some indicators of star formation activity and dust attenuation for spiral galaxies that have been widely
Fernando Fabián Rosales Ortega
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Molecular hydrogen in galaxies [PDF]
, 1987 This study aims to understand the key role played by molecular hydrogen in the evolution of galaxies, with a view to constraining its radial distribution in the Galaxy and the CO→H(_2) conversion factor α(_20).The star formation rate is shown to be ...
Wilkinson, David Adam, Wilkinson, D.A
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A Milky Way-like barred spiral galaxy at a redshift of 3. [PDF]
Nature, 2023 Costantin L +32 more
europepmc +1 more source
, 1995 This thesis deals with surface photometry of face-on spiral galaxies in a statistical way, using both single passband as well as color information of a large sample of galaxies. In this chapter I first discuss galaxy formation and evolution models and the role that photometry plays in testing these models.
openaire +1 more source