Download or read book Les n buleuses plan taires written by and published by . This book was released on 1973 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Les N buleuses plan taires written by and published by . This book was released on 1973 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Les Nebuleuses Planetaires written by and published by . This book was released on 1973 with total page 495 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book N buleuses plan taires ressource lectronique written by Denis Bergeron and published by [Val-des-Bois, Québec] : Denis Bergeron. This book was released on 2004* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Planetary Nebulae written by D.E. Osterbrock and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 473 pages. Available in PDF, EPUB and Kindle. Book excerpt: This written account of the Symposium on Planetary Nebulae was prepared from manuscripts submitted by the participants. Nearly every paper that was presented at the meeting is reproduced here, in either complete or abbreviated form. The dis cussions have been somewhat shortened and rearranged, but we have tried to preserve the essential points and the general tenor of the exchanges. Participants who spoke in the discussion were asked immediately for written remarks, which were then edited, reproduced, and circulated at the meeting by the highly effective local Secretariat organized by Dr Perek. In addition, notes of the discussion taken by Mrs Edith F. Swan and by the undersigned were used. We wish to thank all the authors for their unusually good cooperation. We are especially grateful to Dr Minkowski, who kindly provided many excellent repro ductions of Mount Wilson and Palomar photographs, mostly taken by himself, of various planetary nebulae. We are particularly indebted to Mrs Swan, who attended the Symposium, made notes on the papers and discussions as they occurred, and did much of the checking and editing of the manuscripts. In addition, we are very grateful to Mrs Evelyn Seaver, who also did much of the checking, editing, and retyping of manuscripts, and to Dr B.L. Webster, Miss Rebecca Todd, Mr Joseph Tapscott, and Mr Dennis Schatz, who provided excellent assistance in the preparation of this volume.
Download or read book Planetary Nebulae and How to Observe Them written by Martin Griffiths and published by Springer Science & Business Media. This book was released on 2012-02-24 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: Planetary Nebulae and How to Observe Them is for amateur astronomers who want to go beyond the Messier objects, concentrating on one of the most beautiful classes of astronomical objects in the sky. Planetary nebulae are not visible to the naked eye, but they are a fascinating group of telescope objects. This guide enables a user equipped with an average-sized amateur telescope to get the best out of observing them. Topics covered include their astrophysical make-up, history of their discovery, classification and description, telescopes to use, filters, and observing techniques - in short everything anyone would need to know to successfully observe planetary nebulae. The book describes the various forms these astronomical objects can take and explains why they are favorite targets for amateur observers. Descriptions of over 100 nebulae personally observed by the author using telescopes of various sizes are included in the book. Readers can create their own observing program or follow the list of these captivating objects, many of which are found within our own Milky Way Galaxy.
Download or read book N buleuses plan taires excit es par un rayonnement X mou written by Grażyna Stasińska and published by . This book was released on 1972 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Astronomy and Astrophysics Abstracts written by S. Böhme and published by Springer Science & Business Media. This book was released on 2013-12-14 with total page 1180 pages. Available in PDF, EPUB and Kindle. Book excerpt: From the reviews: Astronomy and Astrophysics Abstracts has appeared in semi-annual volumes since 1969 and it has already become one of the fundamental publications in the fields of astronomy, astrophysics and neighbouring sciences. It is the most important English-language abstracting journal in the mentioned branches. ... The abstracts are classified under more than hundred subject categories, thus permitting a quick survey of the whole extended material. The AAA is a valuable and important publication for all students and scientists working in the fields of astronomy and related sciences. As such it represents a necessary ingredient of any astronomical library all over the world." Space Science Reviews #1 "Dividing the whole field plus related subjects into 108 categories, each work is numbered and most are accompanied by brief abstracts. Fairly comprehensive cross-referencing links relevant papers to more than one category, and exhaustive author and subject indices are to be found at the back, making the catalogues easy to use. The series appears to be so complete in its coverage and always less than a year out of date that I shall certainly have to make a little more space on those shelves for future volumes." The Observatory Magazine #1
Download or read book An Introduction to Planetary Nebulae written by Jason J. Nishiyama and published by Morgan & Claypool Publishers. This book was released on 2018-05-25 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book we will look at what planetary nebulae are, where they come from and where they go. We will discuss what mechanisms cause these beautiful markers of stellar demise as well as what causes them to form their variety of shapes. How we measure various aspects of planetary nebulae such as what they are made of will also be explored. Though we will give some aspects of planetary nebulae mathematical treatment, the main points should be accessible to people with only a limited background in mathematics. A short glossary of some of the more arcane astronomical terms is at the end of the book to help in understanding. Included at the end of each chapter is an extensive bibliography to the peer reviewed research on these objects and I would encourage the reader interested in an even deeper understanding to read these articles.
Download or read book Contribution l tude cin matique et dynamique des n buleuses plan taire dans la galaxie written by Sophie Durand and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'objectif de cette thèse est d'apporter quelques éléments nouveaux sur la structure et l'évolution de la Galaxie via l'étude cinématique et dynamique nébuleuses planétaires. La première partie de cette thèse présente une étude cinématique des nébuleuses planétaires galactiques. Toutes les vitesses radiales existantes ont tout d'abord été compilées dans un catalogue : la plupart des vitesses provenant de la littérature ont été corrigées de la présence d'écarts systématiques, écarts évalués par comparaison directe avec des données inédites à hautes résolution. L'échantillon ainsi rassemblé et calibré de façon homogène constitue la meilleure base de données actuelle concernant les vitesses radiales des nébuleuses planétaires. Leurs cinématiques sont examinées lors d'une analyse préliminaire, à la fois dans le bulbe et dans le disque. La seconde partie de cette thèse concerne l'analyse dynamique des nébuleuses planétaires dans la Galaxie, consistant globalement à évaluer les coefficients d'une combinaison linéaire de familles de fonctions de distribution analytique. Cette évaluation se fait en estimant différents observables représentant ici les 3 premiers moments de la distribution de vitesse des nébuleuses planétaires. Les principaux composants galactiques ainsi que leurs lois de densité sont identifiés après déprojection de la carte de densité. Néanmoins, une rapide comparaison qualitative données/modèle montre que le modèle à 2 intégrales ne s'ajuste pas bien aux cinématiques de l'échantillon, et plus particulièrement dans les disques épais. Cela laisse 2 hypothèses : soit l'échantillon en question est très incomplet dans le disque, soit il existe bel et bien une troisième intégrale dans la fonction de distribution des nébuleuses planétaires.
Download or read book Cin matique ge et binarit des noyaux de n buleuses plan taires written by Agnès Acker and published by . This book was released on 1976 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: On présente un essai de classification objective, base, en particulier, sur certaines propriétés chimique, étudiées par Kaler (1970). On en déduit les paramètres cinématiques et spatiaux révélateurs de l'âge stellaire. On présente les premiers résultats d'une étude spectrographique systématique des noyaux les plus brillants dans le but de déceler d'éventuelles binarités.
Download or read book Planetary Nebulae written by G.A. Gurzadyan and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 331 pages. Available in PDF, EPUB and Kindle. Book excerpt: The publication in English of this monograph seems to me to indicate the ever increasing interest of astrophysicists in the physical and dynamical problems of planetary nebulae-one of the most interesting and fruitful branches of theoretical astrophysics. Their interest in part arises from the fact that the methods of identify ing the physical processes occurring in planetary nebulae, as well as the many theo retical results, are now acquiring a degree of uni versality as their sphere of application increases. Finally, the special cosmic significance of planetary nebulae is becoming apparent. The English edition of Planetary Nebulae differs considerably from the Russian version published in 1962, primarily because of the new results included in it, but also because of numerous editorial revisions. The problems of magnetic fields and hydrodynamics in planetary nebulae are beginning to occupy an important place in the study of the dynamics of these objects. Recent studies by D. H. Menzel confirm the idea advanced in the present mono graph as to the existence of magnetic fields in planetary nebulae. New light is being cast on the dynamics of planetary nebulae by the hydrodynamic investigations of F. D. Kahn, W. G. Mathews and others. Unfortunately I was not able to include these and other interesting results in the present edition.
Download or read book Planetary Nebulae written by Y. Terzian and published by Springer Science & Business Media. This book was released on 1978-03-31 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of IAU Symposium No. 76 held at Cornell University, Ithaca NY, USA, 6-10 June 1977
Download or read book Le bulbe galactique trac par les n buleuses plan taires written by Alan Peyaud and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Planetary Nebulae written by Steven J. Hynes and published by Richmond, Va. : Willmann-Bell. This book was released on 1991 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Physics and Dynamics of Planetary Nebulae written by Grigor A. Gurzadyan and published by Springer Science & Business Media. This book was released on 2013-04-09 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt: Planetary nebulae are the classic subject of astrophysics. The physical pro cesses occurring in this highly ionized gaseous medium, the formation of emis sion lines in clearly specified conditions, the continuous emission extending from the far ultraviolet up to infrared and radio frequencies, the generation of exotic forms of radiation predicted by atomic physics, along with methods for deciphering the observed spectra and detecting physical and kinematic parameters of the radiating medium, etc. - all these problems form the solid foundations of the physical theory of gaseous nebulae. They are an essential part of the arsenal of powerful tools and concepts without which one cannot imagine understanding and interpreting the enormous diversity of processes taking place in the Universe - in gaseous envelopes surrounding the stars of various classes, from cool dwarfs and flare stars up to hot supergiants, as well as in stellar chromospheres and coronae, in atmospheres of unstable and anomalous stars, in circumstellar clouds and gaseous shells born in nova and supernova explosions, in diffuse nebulae and the interstellar medium, in interacting binary systems, in galaxies with emission lines, in quasars, etc. The last thirty years have seen a turning-point in our knowledge concern ing the very nature of planetary nebulae (PNs). The radio emission of PNs was discovered after it was predicted theoretically. On the other hand, the powerful infrared emission discovered both in the continuum and in emission lines was never expected.
