Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Download Instabilite Gravitationnelle Et Formation Des Etoiles Des Galaxies Et De Leurs Structures Caracteristiques full books in PDF, epub, and Kindle. Read online Instabilite Gravitationnelle Et Formation Des Etoiles Des Galaxies Et De Leurs Structures Caracteristiques ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Author :
Publisher :
ISBN 13 :
Total Pages : 376 pages
Book Rating : 4.X/5 (3 download)
Download or read book Instabilite Gravitationnelle Et Formation Des Etoiles, Des Galaxies Et de Leurs Structures Caracteristiques written by and published by . This book was released on 1967 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 512 pages
Book Rating : 4.:/5 (319 download)
Download or read book NASA Technical Report written by and published by . This book was released on 1970 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Frank Hohl
Publisher :
ISBN 13 :
Total Pages : 116 pages
Book Rating : 4.:/5 (31 download)
Download or read book Dynamical Evolution of Disk Galaxies written by Frank Hohl and published by . This book was released on 1970 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: A computer model for isolated disks of stars is presented and is used to study the self-consistent motion of large numbers of point masses as they move in the plane of the galactic disk. The Control Data 6600 computer system at the Langley Research Center was used to integrate the equations of motion for each star for systems containing from 50,000 to 200,000 stars. Any initially cold balanced disk was found to be violently unstable. A sufficient amount of velocity dispersion will stabilize all small-scale disturbances. However, most disks investigated were found to be unstable against slowly growing long-wavelength modes, and after about two rotations the disks tended to assume a bar-shaped structure. It was also found that the final mass distribution for most disks could be closely approximated by an exponential variation irrespective of the initial mass distribution. To study the development of spiral structure, the model was modified to include a fixed central force similar to that in the Schmidt model of the Galaxy. The mass of the stars in the disk was taken to be from 5 to 50 percent of the total mass of the Galaxy. The evolution of a number of initial distributions of stars was investigated. The results of the calculation gave a velocity dispersion for the disk stars which was about 50 percent larger than the value of about 30 km/sec found from observation of stars in the solar neighborhood. For some of the disks investigated, a pronounced spiral structure remained even after 8.5 rotations.
Author : Frank Hohl
Publisher :
ISBN 13 :
Total Pages : 92 pages
Book Rating : 4.:/5 (31 download)
Download or read book Theory and Results on Collective and Collisional Effects for a One-dimensional Self-gravitating System written by Frank Hohl and published by . This book was released on 1968 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: The equilibrium properties of one-dimensional self-gravitating systems are investigated analytically. One-dimensional models are used to perform computer experiments tracing the evolution of stellar systems. The stationary solution of the Vlasov equation for a one-dimensional system of stars as computed for an interesting class of initial conditions is found to correspond to a minimum-energy configuration. The results of the numerical experiments are compared with theory. For initial energies far from the minimum equilibrium energy the system becomes unstable and breaks up into smaller clusters. A variational principle was applied to the one-dimensional stellar system to show that stationary distribution functions which decrease monotonically in going outward from the center of the system are stable. That other stationary distributions may be unstable is illustrated by means of computer experiments. The one-dimensional model is of interest as an approximation to the distribution of velocity and mass normal to the galactic plane of a greatly flattened galactic system. Observational results for the gravitational force normal to the galactic plane of the Galaxy agree with the results obtained from the one-dimensional model. Thermalization effects for systems containing small numbers of stars were investigated. The fluctuation of the kinetic energy was found to be inversely proportional to the square root of the number of particles in the system.
Author :
Publisher :
ISBN 13 :
Total Pages : 324 pages
Book Rating : 4.:/5 (3 download)
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1968 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 882 pages
Book Rating : 4.0/5 ( download)
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1967-10 with total page 882 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 1256 pages
Book Rating : 4.3/5 (91 download)
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1967-11 with total page 1256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Université de Liège. Institut d'astrophysique
Publisher :
ISBN 13 :
Total Pages : 386 pages
Book Rating : 4.:/5 (36 download)
Download or read book Collection in 8.̊ written by Université de Liège. Institut d'astrophysique and published by . This book was released on 1967 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chiefly reprints.
Author : Bronisław Kuchowicz
Publisher :
ISBN 13 :
Total Pages : 270 pages
Book Rating : 4.3/5 (91 download)
Download or read book Nuclear and Relativistic Astrophysics and Nuclidic Cosmochemistry: 1963-1967 written by Bronisław Kuchowicz and published by . This book was released on 1968 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 656 pages
Book Rating : 4.3/5 (91 download)
Download or read book Bulletin astronomique written by and published by . This book was released on 1968 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 510 pages
Book Rating : 4.X/5 (1 download)
Download or read book Les nébuleuses planétaires written by and published by . This book was released on 1973 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 680 pages
Book Rating : 4.3/5 (2 download)
Download or read book The National union catalog, 1968-1972 written by and published by . This book was released on 1973 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Harvard College Observatory
Publisher :
ISBN 13 :
Total Pages : 734 pages
Book Rating : 4.3/5 (91 download)
Download or read book Reprints written by Harvard College Observatory and published by . This book was released on 1968 with total page 734 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Polydore Swings
Publisher :
ISBN 13 :
Total Pages : 36 pages
Book Rating : 4.X/5 (1 download)
Download or read book Free Radical in Astrophysics written by Polydore Swings and published by . This book was released on 1969 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 150 pages
Book Rating : 4.X/5 (1 download)
Download or read book Les Traumatismes multiples written by and published by . This book was released on 1969 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Université de Liège
Publisher :
ISBN 13 :
Total Pages : 1104 pages
Book Rating : 4.3/5 (91 download)
Download or read book Les Congrés et colloques de l'Université de Liège written by Université de Liège and published by . This book was released on 1969 with total page 1104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Harvard College Observatory
Publisher :
ISBN 13 :
Total Pages : 556 pages
Book Rating : 4.:/5 (321 download)
Download or read book Reprints. Series I. written by Harvard College Observatory and published by . This book was released on 1966 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt:
