Download or read book Dynamics of Gas in Barred Spiral Galaxies I NGC 6221 written by W. D. Pence and published by . This book was released on 1983 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Observations and Modeling of the Gas Dynamics of the Barred Spiral Galaxy NGC 3359 written by John Roger Ball and published by . This book was released on 1984 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt: We have conducted a detailed study of the dynamics of the neutral hydrogen gas in the bright northern barred spiral galaxy NGC 3359. Observations of the 21 cm line at the Very Large Array have been reduced to give single-channel maps with a spatial resolution of 18", and a velocity resolution of 25 km/s. The acquisition, calibration, and reduction of the data are discussed in some detail. Maps of the integrated column density and mean velocity of the atomic hydrogen, derived from the channel maps, provide the principal data for an investigation of the dynamics associated with the spiral structure of the galaxy. On scales comparable to the resolution of this survey, approximately 1 kpc at the distance of NGC 3359, the gas is broken up into a somewhat chaotic distribution of local maxima and minima. However, on larger scales the column density shows a smooth, grand design spiral pattern with two principal spiral arms. The extent and density of these two arms are roughly equal in the 21 cm map, unlike the optical image. These neutral hydrogen arms are very well correlated with the positions of H II regions. The observed velocity field of NGC 3359 shows large kinematical deviations from simple rotation. The locations of the disturbances are closely correlated with the optical and 21 cm spiral structure, and indicate that significant spiral streaming motions are present in the arms. We have performed numerical modeling of the galaxy, using the well-known "beam scheme" hydrodynamical code, to attempt to reproduce the observed kinematics. Two types of model have been employed. In the first, the spiral structure is driven by an inhomogeneous, triaxial bar, whose density distribution is determined from near infrared surface photometry. The alternative is an oval distortion of the underlying disk surface density. In models which depend solely on the triaxial bar, the kinematical perturbations in the galaxy's outer regions are far too weak, relative to those near the bar. The oval distortion models fit the observed velocities much more accurately. We conclude that the spiral structure in NGC 3359 cannot be driven entirely by the nonaxisymmetric force produced by the observed optical bar.

Download or read book Observations and Modeling of the Gas Dynamics of the Barred Spiral Galaxy NGC 7479 written by Seppo Jalmari Laine and published by . This book was released on 1996 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Gas Dynamics in Barred Spiral Galaxies written by Per A. B. Lindblad and published by . This book was released on 1996 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dynamics of Gas in a Rotating Galaxy written by William Alexander Mulder and published by . This book was released on 1985 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dynamics of spiral galaxies written by L. Weliachew and published by . This book was released on 1975 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book International Aerospace Abstracts written by and published by . This book was released on 1984 with total page 706 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Spiral Structure in Galaxies written by Marc S Seigar and published by Morgan & Claypool Publishers. This book was released on 2017-06-29 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: How does it happen that billions of stars can cooperate to produce the beautiful spirals that characterize so many galaxies, including ours? This book reviews the history behind the discovery of spiral galaxies and the problems faced when trying to explain the existence of spiral structure within them. In the book, subjects such as galaxy morphology and structure are addressed as well as several models for spiral structure. The evidence in favor or against these models is discussed. The book ends by discussing how spiral structure can be used as a proxy for other properties of spiral galaxies, such as their dark matter content and their central supermassive black hole masses, and why this is important.

Download or read book Kinematics and Dynamics of Barred Spiral Galaxies written by Martin Nicholas England and published by . This book was released on 1986 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mass Transfer Induced Activity in Galaxies written by Isaac Shlosman and published by Cambridge University Press. This book was released on 2003-10-30 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt: How gas flows and starbursts light up active galaxies.

Download or read book The Dynamics of Barred Spiral Galaxies written by Benjamin J. Weiner and published by . This book was released on 1998 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Structures and Dynamics of Ngc 3359 written by Veera Boonyasait and published by . This book was released on 2003 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The H I Distribution and Dynamics in Two Late type Barred Spiral Galaxies written by Daniel J. Pisano and published by . This book was released on 1997 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dynamics of Galaxies and Their Molecular Cloud Distributions written by F. Combes and published by Springer Science & Business Media. This book was released on 1991-01-31 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the 146th Symposium of the International Astronomical Union, held in Paris, France, June 4-9, 1990

Download or read book The Peculiar Spiral Galaxy NGC 4258 written by Geert Dick van Albada and published by . This book was released on 1978 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summary also in Dutch.

Download or read book The Distribution And Inematics of Neutral Hydrogen Gas and the Radio Continuum Emission in Barred Spiral Galaxies written by Marc Philip Ondrechen and published by . This book was released on 1985 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book On the Dynamics of Barred Spiral Galaxies written by Alan Leslie Duus and published by . This book was released on 1975 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: