Roberto Viotti (90 results)

Hardcover. Condition: Very Good with no dust jacket. Volume 369 in the Lecture Notes in Physics series. Ex-library with the typical markings. Small scrape on rear free endpage, has a small piece of tape on it. Cover edges a little rubbed. 462 pages. ; 6 3/4 x 9 3/4".

Condition: New.

Paperback or Softback. Condition: New. The Symbiotic Phenomenon: Proceedings of the 103rd Colloquium of the International Astronomical Union, Held in Torun, Poland, August 18-20, 1987. Book.

Condition: New.

Condition: Gut. 22 Seiten; Der hier angebotene Sonderdruck ist informativ und kurz gehalten. Er stammt aus der Separaten-Sammlung einer wissenschaftlichen Bibliothek und trägt einen den Text nicht verdeckenden Stempel. Insgesamt ordentlicher Erhaltungszustand. Aufgrund der Rarität und des geringen Umfangs des Werkes bitten wir um Verständnis, dass dieser Sonderdruck vom Rückgaberecht ausgeschlossen ist. Sprache: Deutsch Gewicht in Gramm: 80.…

Condition: Very Good. 1st Edition. Former library copy. Pages intact with possible writing/highlighting. Binding strong with minor wear. Dust jackets/supplements may not be included. Includes library markings. Stock photo provided. Product includes identifying sticker. Better World Books: Buy Books. Do Good. …

Condition: New. In English.

Hardcover. Condition: VERY GOOD. Ex-lib, sound and square otherwise, very clean and sharp.

Condition: New.

Gr.-8°, Original Hardcover. 1. ed. XII, 310 p. Shelfmark, Stamp on preliminary page and title, otherwise fine copy. Sprache: Englisch Gewicht in Gramm: 0.

Condition: New. pp. 384.

hardcover. Condition: Good. Ex-library copy with usual markings. Shows minor wear.

Gr.-8°, Original Hardcover. 1. ed. XII, 310 p. Stamp on preliminary page and title, otherwise fine copy. Sprache: Englisch Gewicht in Gramm: 0.

Taschenbuch. Condition: Neu. Druck auf Anfrage Neuware - Printed after ordering - Symbiotic stars were identified spectroscopically as M giants with a very strong He II 4686 emission line. After five decades of study by many astronomers, the first internatioinal meetings devoted to symbiotics were held at the University of Colorado (Boulder) and at the Haute Provence Observatory during the Summer of 1981. These conferences emphasized exciting new results obtained by modern satellite (EINSTEIN, IUE) and ground-based observatories. Although the vast majority of the participants were already fairly sure that symbiotics are almost certainly interacting binary systems, and not extremely peculiar single stars, it was not clear exactly which types of physical processes were needed to be invoked to explain their observed behaviour. Many were even worried that it might not be possible to clearly define a class of 'symbiotic stars' , and thus establish a unique model applicable to any system. Since the publication of the Haute-Provence proceedings, our understanding of the physical processes occuring in symbiotic stars (and in related objects such as cataclysmic variables and compact planetary nebulae) has greatly improved. We now speak confidently of a 'symbiotic phenomenon' , in which an evolved red giant and a hot companion object (usually thought to be an accreting main sequence star or a luminous white dwarf star) happily coexist.…

Paperback. Condition: Brand New. 384 pages. 9.25x6.10x0.87 inches. In Stock.

Condition: New.

Condition: New.

Condition: As New. Unread book in perfect condition.

Condition: As New. Unread book in perfect condition.

Condition: As New. Unread book in perfect condition.

Paperback. Condition: New.

Condition: New.

Condition: As New. Unread book in perfect condition.

Condition: New. In English.

Condition: New. In English.

Condition: New. In English.

Paperback. Condition: Like New. LIKE NEW. SHIPS FROM MULTIPLE LOCATIONS. book.

Condition: As New. Unread book in perfect condition.

Taschenbuch. Condition: Neu. Druck auf Anfrage Neuware - Printed after ordering - The same kind of physics is frequently common to very different fields of Astrophysics, so experts in each of these fields have often much to learn from each others. It was therefore logical that the International Astronomical Union should sponsor a colloquium about an ion which pro duces many spectral lines that can be used as a diagnostic for many sorts of objects, and which may sometimes have a major influence on physical processes occurring in astro physical sources. The lines of singly ionized iron (FeII) are present in absorption and emission in the spectra of objects such as the Sun, cool stars, circumstellar envelopes of hot stars, novae, diffuse nebulae including the supernova remnants, and active galactic nuclei. These lines are very often formed far from LTE, and their interpretation is not easy in view of the complex Grotrian diagram for FeII, and the gaps in the knowledge of various physical parameters. In addition, the density of very strong FeII lines becomes very large in the ultraviolet, and the lines can play a major role in the line blanketing. They need therefore to be taken into account in any energy balance argument.…

Taschenbuch. Condition: Neu. Druck auf Anfrage Neuware - Printed after ordering - Many aspects of symbiotic stars have long puzzled astronomers. For instance while most students of the subject have considered them binary, many have at different times supported single star models. The nature of their outbursts is uncertain, while the dividing line between symbiotic stars and novae is unclear. In any case doubts can even be raised as to whether a class of 'Symbiotic Stars' really exists. Much new data has been obtained in recent years, in particular from the study of radiation outside the visual region. Many symbiotic stars have been studied in the UV with IUE since 1978, while X-rays were det ected in a few cases with the Einstein satellite. There have been a num ber of infrared and radio studies, and the number of known symbiotic stars has also considerably increased. Furthermore theoretical ideas have in recent years been considerably enriched by concepts of stellar winds, and accretion phenomena in binaries including accretion disks. It was there fore extremely opportune and timely to hold the first international meet ing exclusively devoted to these stars, so as to consider the new results from such a wide range of observations in different spectral regions, and the conclusions which can be drawn for possible models as well as theories of the nature and structure of symbiotic stars. After a session devoted to new observations in different spectral regions, a session was spent considering some individual stars.…