Download or read book Abundances of Elements in Stars and Nebulae the Abundance of Certain Elements in the Solar Atmosphere written by and published by . This book was released on 1962 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The chemical composition of the Manganese star 53 Tauri was studied with the aid of data secured with the coude spectrograph of the 120-inch reflector at the Lick Observatory. Transition probabilities required for the problem are obtained from laboratory sources whenever possible, but some are obtained by the calibration of stellar data. The temperature of the star, deduced from ionization equilibrium, is near 11,000K-a value in good agreement with that found from spectral energy scans by Jugaku and Sargent. The electron pressure in the atmosphere, deduced from the total intensities of hydrogen lines, appears to lie in the neighborhood of 500 dynes sq cm. Several striking abundance anomalies are found; they cannot be explained by deviations from local thermodynamic equilibrium. Manganese seems to be the most abundant metal in the star, but gallium appears to show the greatest enhancement of abudance over the 'normal' value. Strontium, yttrium, and zirconium are also enhanced in abudnace, whilst magnesium, and calcium seems to be depleted. (Author).
Download or read book Abundances of Elements in Stars and Nebulae written by Lawrence Hugh Aller and published by . This book was released on 1962 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents: Energy distribution in globular star clusters Data for southern globular clusters Measurements of the energy distributions in southern globular clusters Spectrophotometry of the Wolf-Rayet star of gamma 2 velorum The hydrogen/helium ratio in HD 96446 The emission nebulosities in the large Magellanic cloud Emission nebulosities in the small Magellanic cloud Photographic region of the spectrum of NGC 7009 Report on research carried out at the University of Michigan and supported by the U.S.A.F. under Contract No. AF 49(638)807.
Download or read book Abundances of Elements in Stars and Nebulae Studies of hydrogen deficient stars I written by Lawrence Hugh Aller and published by . This book was released on 1962 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Abundances of Elements in Stars and Nebulae The Abundance of Certain Elements in the Solar Atmosphere written by L. E. Aller and published by . This book was released on 1962 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Abundances of Elements in Stars and Nebulae written by Lawrence Hugh Aller and published by . This book was released on 1962 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Abundances of Elements in Stars and Nebulae Spectral line strengths from astrophysical data written by and published by . This book was released on 1962 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Abundances of Elements in Stars and Nebulae The manganese star 53 Tauri written by and published by . This book was released on 1962 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atoms Stars and Nebulae written by Lawrence H. Aller and published by Cambridge University Press. This book was released on 1991-08-30 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: A semi-popular account of stars and gaseous nebulae, treating topics such as stellar evolution, the origin of elements, supernovae and cosmic rays.
Download or read book Abundances of Elements in Stars and Nebulae Determination of ratio of gas pressure to electron pressure in stellar atmospheres written by and published by . This book was released on 1962 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Abundance of the Elements written by Lawrence Hugh Aller and published by . This book was released on 1961 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atoms Stars and Nebulae written by Leo Goldberg and published by . This book was released on 1943 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Abundances of Elements in Stars and Nebulae determination of Ratio of Gas Pressure Toelectron Pressure in Stellar Atmospheres written by C. COWLEY and published by . This book was released on 1962 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ratio of gas pressure (P sub g) to electron pressure (P sub e) has been computed over a range of temperatures by an approximate method and also by a more exact IBM 709 program. The approximate method shows large errors at low temperatures and high gas pressures. Tables give the values of log P sub g and log P sub e computed by the 709 as well as the relative abundances to which these values refer. (Author).
Download or read book Atoms Stars and Nebulae written by Lawrence Hugh Aller and published by Cambridge, Mass : Harvard University Press. This book was released on 1971 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Planetary Nebulae written by Stuart R. Pottasch and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this book is to give a detailed description of the planetary nebulae including the relevant astronomical observations and their interpretation. Considerable attention is given to the evolution of these objects as well as to their physical characteristics. I t is hoped that the book be useful to both advanced research workers and to students with some background in astronomy. In this regard, the book should serve as a text as well as a reference work. The many tables included are expected to be useful for both purposes. The references are generally not included in the text except for historical purposes in an effort to improve readability. References are given at the end of each chapter together with sufficient text to describe their content. No attempt has been made to make the list of references complete; on the contrary it has generally been limited to the most recent literature on the subject which in turn refers to earlier research. Again, exceptions have been made for references of historical interest.
Download or read book Elements and the Cosmos written by Bernard Ephraim Julius Pagel and published by Cambridge University Press. This book was released on 1992-10-15 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: While there have been many books on cosmology and galactic and stellar evolution in which abundance analysis of astrophysical objects has played some part, this book is the first one for several years where specialists in the various relevant fields discuss the basis and implications of the subject as a whole. The major aim of the book is to bring together the results from high redshift studies and galactic studies in a coherent way and to cover relevant aspects of nuclear and atomic physics.
Download or read book Planetary Nebulae IAU S323 written by Xiaowei Liu and published by Cambridge University Press. This book was released on 2017-09-28 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Planetary nebulae, glowing shells of ionized gas, are the spectacular products of the evolution of low- and intermediate-mass stars. For astrophysicists, they are important laboratories for the understanding of atomic, molecular, dust, and plasma processes in different cosmic environments; they enable the exploration of the fundamental physics of single and binary star evolution including nucleosynthesis, rotation, mass transfer and loss, and magnetic fields; and they help trace stellar populations, the kinematics, and chemistry of galaxies including our own galaxy, the Milky Way. This volume reviews the current status of this vibrant research field in the form of invited reviews, contributed talks, and posters presented at the IAU Symposium 323. It should be of interest to researchers and advanced students interested in this field and in related fields, including stellar physics, the interstellar medium, and Galactic and extragalactic astronomy.
Download or read book The Abundance of the Elements in Planetary Nebulae in the Galactic Bulge written by Christopher Muir Price and published by . This book was released on 1978 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
