Artikel bewerten This book is based partly on a. The subject of galactic chemical evolution was started and developed by Beat- rice Tinsley in the seventies and now is a flourishing subject. This book is dedi- cated to the chemical evolution of our Galaxy and aims at giving an up-to-date review of what we have learned since Tinsley's pioneering efforts. At the time of writing, in fact, books of this kind were not available with the exception of the excellent book by Bernard Pagel on "Nucleosynthesis and Chemical Evolution of Galaxies" Cambridge University Press,and the subject of galactic chem- ical evolution has appeared only as short chapters in books devoted to other subjects.
The term proto-planetary nebulae PPNe in the context of the late stages of stellar evolution was created only slightly more than 20 years ago to express the belief that in the near future these objects will become planetary nebulae PNe.
Investigation of this phase of stellar evolution developed very rapidly in 's after the IRAS mission when it became clear that proto-planetary nebulae emit a significant part of their energy in the mid-and far-infrared. Hundreds of new candidates have been proposed but the recognition of the real proto-planetary nebulae is not a simple task and needs a substantial effort to exclude cases that represent different evolutionary stages.
High resolution spectroscopy of stellar atmospheres is of much importance in this respect. Surprisingly, only a small group of central stars, the so called 21 11m emitters, show chemical signatures of the 3 rd dredge up process.
Very recently, a more detailed studies of mid-infrared spectra from the Infrared Space Observatory ISO allow for a better understanding of chemical composition and evolution of circumstellar material around these stars.
A new impetus in the field of proto-planetary nebulae research was started in the 's with high spatial resolution imaging in mid-infrared and optical wavelength ranges.Big Bang nucleosynthesis began roughly 10 seconds after the big bang, when the universe had cooled sufficiently to allow deuterium nuclei to survive disruption by high-energy photons.
and thus can be seen in a very early stage of their evolution G. Gamow, The Origin of Chemical Elements, Physical Review 73 (), The so-called. Even more recently more abun- dance data have accumulated for external galaxies at both low and high redshift, thus providing precious information on the chemical evolution of different types of galaxies and on the early stages of galaxy evolution.
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Get this from a library! Nucleosynthesis and chemical evolution of galaxies.
[B E J Pagel] -- Pagel introduces a broad spectrum of astrophysics topics, from thermonuclear reactions and cosmological element production to abundance measurements in astronomical sources, nucleosynthesis, light.
The detailed abundances of 23 chemical elements in nine bright red giant branch stars in the Carina dwarf spheroidal galaxy are presented based on high-resolution spectra gathered at the Very Large Telescope (VLT) and Magellan telescopes.
Written by seven prestigious astrophysics researchers, it covers cosmological and stellar nucleosynthesis, abundance determinations in stars and ionised nebulae, chemical composition of nearby and distant galaxies, and models of chemical evolution of galaxies and intracluster medium.