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The Galactic Nova Rate
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Book Synopsis The Galactic Nova Rate by : Adam Kawash
Download or read book The Galactic Nova Rate written by Adam Kawash and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is a significant discrepancy between recent predictions of the Milky Way classical nova rate of 8́ơ 60 per year and the annual discovery rate of 8́ơ 10. Why the recovery fraction of these events is 8́ơ 15% even with large advancements to observational time domain astronomy remains largely unexplained. Because of the location of Earth within the Galaxy, discovering Galactic transients requires a large field of view. For the past few decades, observations from a network of amateur astronomers were largely responsible for discovering classical novae, so the sky-coverage as a function of position and depth was difficult to model. Fortunately, in the past decade, many time domain surveys with fields of view that cover large areas of the sky have been commissioned, making the sky-coverage more well defined. To date, there are no Galactic nova rate predictions made using data from a time domain survey that is capable of observing the entire sky. In this thesis, the first estimate of the Galactic nova rate using observations from two all-sky surveys is made.The All-Sky Automated Survey for Supernovae (ASAS-SN) is the first survey to systematically observe the entire sky every night, providing unprecedented cadence of the sky for transients and variable stars. The space-based survey Gaia has a broad observing filter and a fine (8́ơ 0.1 arcsecond) pixel scale, so it is capable of detecting Galactic plane transients in crowded fields that are heavily affected by extinction. These are the only two all-sky surveys to report classical nova candidates, and they have contributed to marginally increasing the discovery rate of Galactic novae to 13 per year on average since 2017. In addition to the increase in discoveries, this thesis exploits the systematic observing patterns to estimate what fraction of the Galaxy's novae these surveys detect. To make this estimate, I have constructed a statistical model of Galactic classical novae by utilizing the recently published models of stellar density and extinction of the Milky Way. Using ASAS-SN photometry, I measure the outburst amplitude of novae to be normally distributed with mean and standard deviation Îơ = 11.43 ℗ł 0.25 mag and Ï3 = 2.57 ℗ł 0.20 mag, respectively. By using recently available all-sky 3D dust maps, I estimate that 8́ơ 50% of Galactic novae are hidden by extinction from being detected by ASAS-SN. Finally, I estimate that the recovery fraction of the global population of Galactic novae for ASAS-SN 9́8 33%, Gaia 9́8 42%, and a joint effort of the two surveys 9́8 54%, predicting that the Galactic nova rate is 26 ℗ł 5 yr8́21, significantly lower than recent estimates.
Book Synopsis The Chemical Evolution of the Galaxy by : Francesca Matteucci
Download or read book The Chemical Evolution of the Galaxy written by Francesca Matteucci and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is based partly on a. lecture course given at the University of Tri este, but mostly on my own research experience in the field of galactic chemical evolution. 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, 1997), and the subject of galactic chem ical evolution has appeared only as short chapters in books devoted to other subjects. Therefore, I felt that a book of this kind could be useful. The book summarizes the observational facts which allow us to reconstruct the chemical history of our Galaxy, in particular the abundances in stars and in terstellar medium; in the last decade, a great deal of observational work, mostly abundance determinations in stars in the solar vicinity, has shed light on the pro duction and distribution of chemical elements. 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.
Book Synopsis The Galaxies of the Local Group by : Sidney Bergh
Download or read book The Galaxies of the Local Group written by Sidney Bergh and published by Cambridge University Press. This book was released on 2000-05-15 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Local Group is a small cluster of galaxies that includes the Milky Way. At least half of all galaxies in the Universe are thought to belong to similar groups. This authoritative volume provides a comprehensive synthesis of what is known about the Local Group. It begins with a summary of each member galaxy, as well as those galaxies previously regarded as possible members. The book examines the mass, stability and evolution of the Local Group as a whole and includes many important previously unpublished results and conclusions. With clarity, Professor van den Bergh provides a masterful summary of all that is known about the galaxies of the Local Group and their evolution, and expertly places this knowledge in the wider context of on-going studies of galaxy formation and evolution, the cosmic distance scale, and the conditions in the early Universe.
Book Synopsis On the Nova Rate in the Galaxy M33 by : Stephen James Williams
Download or read book On the Nova Rate in the Galaxy M33 written by Stephen James Williams and published by . This book was released on 2004 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Classical Nova Explosions by : Margarita Hernanz
Download or read book Classical Nova Explosions written by Margarita Hernanz and published by American Institute of Physics. This book was released on 2002-10-31 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book reviews our current knowledge about Classical Nova Explosions, including all the recent advances from both theoretical and observational points of view. The volume covers a large number of topics, such as the astrophysical scenario, the explosion mechanism (including recent multidimensional approaches), light curves and spectra, and observations based on ground and space facilities, covering all wavelength ranges from radio and infrared to X and gamma-rays. Topics include: novae, cataclysmic variables, nucleosynthesis, white dwarfs, observations (optical, IR, radio, UV, x-rays, gamma-rays).
Book Synopsis Chemical Evolution of Galaxies by : Francesca Matteucci
Download or read book Chemical Evolution of Galaxies written by Francesca Matteucci and published by Springer Science & Business Media. This book was released on 2012-01-05 with total page 237 pages. Available in PDF, EPUB and Kindle. Book excerpt: The term “chemical evolution of galaxies” refers to the evolution of abundances of chemical species in galaxies, which is due to nuclear processes occurring in stars and to gas flows into and out of galaxies. This book deals with the chemical evolution of galaxies of all morphological types (ellipticals, spirals and irregulars) and stresses the importance of the star formation histories in determining the properties of stellar populations in different galaxies. The topic is approached in a didactical and logical manner via galaxy evolution models which are compared with observational results obtained in the last two decades: The reader is given an introduction to the concept of chemical abundances and learns about the main stellar populations in our Galaxy as well as about the classification of galaxy types and their main observables. In the core of the book, the construction and solution of chemical evolution models are discussed in detail, followed by descriptions and interpretations of observations of the chemical evolution of the Milky Way, spheroidal galaxies, irregular galaxies and of cosmic chemical evolution. The aim of this book is to provide an introduction to students as well as to amend our present ideas in research; the book also summarizes the efforts made by authors in the past several years in order to further future research in the field.
Book Synopsis Cataclysmic Variable Stars by : Brian Warner
Download or read book Cataclysmic Variable Stars written by Brian Warner and published by Cambridge University Press. This book was released on 2003-09-18 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt: This timely volume provides the first comprehensive survey of cataclysmic variable stars, integrating theory and observation into a single, synthesised text.
Download or read book Referativnyĭ zhurnal written by and published by . This book was released on 1998 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Astronomy with Radioactivities by : Roland Diehl
Download or read book Astronomy with Radioactivities written by Roland Diehl and published by Springer Science & Business Media. This book was released on 2010-10-02 with total page 577 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces the reader to the field of nuclear astrophysics, i.e. the acquisition and reading of measurements on unstable isotopes in different parts of the universe. The authors explain the role of radioactivities in astrophysics, discuss specific sources of cosmic isotopes and in which special regions they can be observed. More specifically, the authors address stars of different types, stellar explosions which terminate stellar evolutions, and other explosions triggered by mass transfers and instabilities in binary stars. They also address nuclear reactions and transport processes in interstellar space, in the contexts of cosmic rays and of chemical evolution. A special chapter is dedicated to the solar system which even provides material samples. The book also contains a description of key tools which astrophysicists employ in those particular studies and a glossary of key terms in astronomy with radioactivities.
Book Synopsis The Extragalactic Distance Scale by : Sidney Van den Bergh
Download or read book The Extragalactic Distance Scale written by Sidney Van den Bergh and published by . This book was released on 1988 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Exotic Nuclei and Nuclear/particle Astrophysics by : S. Stoica
Download or read book Exotic Nuclei and Nuclear/particle Astrophysics written by S. Stoica and published by World Scientific. This book was released on 2006 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume documents an important event in the World Year of Physics 2005 and a continuation of the traditional international summer schools that have taken place in Romania regularly since 1964. On one hand, the study of exotic nuclei seeks answers about the structure and interaction of unique finite quantum mechanical many-body systems. On the other, it provides data that have an impact on the understanding of the origin of the elements in the Universe.The contributions, written by outstanding professors from prestigious research centers over the world, provide the reader with both comprehensive reviews and the most recent results in the field. Large experimental facilities are discussed together with future research projects. The book offers insights into how experiments in terrestrial nuclear physics laboratories may be combined with observations in outer space to enlarge our basic knowledge.
Book Synopsis Issues in Astronomy and Astrophysics: 2011 Edition by :
Download or read book Issues in Astronomy and Astrophysics: 2011 Edition written by and published by ScholarlyEditions. This book was released on 2012-01-09 with total page 2981 pages. Available in PDF, EPUB and Kindle. Book excerpt: Issues in Astronomy and Astrophysics / 2011 Edition is a ScholarlyEditions™ eBook that delivers timely, authoritative, and comprehensive information about Astronomy and Astrophysics. The editors have built Issues in Astronomy and Astrophysics: 2011 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about Astronomy and Astrophysics in this eBook to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Issues in Astronomy and Astrophysics: 2011 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.
Book Synopsis Dust and Molecules in Evolved Stars by : I. Cherchneff
Download or read book Dust and Molecules in Evolved Stars written by I. Cherchneff and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dust and molecules are found in a large variety of astrophysical environments, in particular in the circumstellar material ejected by evolved stars. This book brings together the leading astronomers and astrophysicists in the field of molecular astrophysics and stellar physics to discuss the important issues of dust and molecular formation, the role of solids in circumstellar environments, molecules as probes of circumstellar parameters, the stellar contribution to the enrichment of the Galaxy, and the latest observational data in various wavelength domains, in partiular in the infrared with results from the Infrared Space Observatory. The astrophysical senarios include late-type stars, novae, Wolf-Rayet stars, Luminous Blue Variables and supernovae. Audience: Researchers and graduate students in the fields of stellar physics, stellar evolution and astrochemistry.
Download or read book Stellar Explosions written by Jordi Jose and published by CRC Press. This book was released on 2016-01-05 with total page 467 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stars are the main factories of element production in the universe through a suite of complex and intertwined physical processes. Such stellar alchemy is driven by multiple nuclear interactions that through eons have transformed the pristine, metal-poor ashes leftover by the Big Bang into a cosmos with 100 distinct chemical species. The products of
Book Synopsis Origin Of Matter And Evolution Of Galaxies 97 by : Shigeru Kubono
Download or read book Origin Of Matter And Evolution Of Galaxies 97 written by Shigeru Kubono and published by World Scientific. This book was released on 1999-01-15 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Cataclysmic Variables. Recent Multi-Frequency Observations and Theoretical Developments by : H. Drechsel
Download or read book Cataclysmic Variables. Recent Multi-Frequency Observations and Theoretical Developments written by H. Drechsel and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent advances in observational and theoretical efforts in understanding the nature of cataclysmic variables had reached such maturity that there existed a strong, shared feeling among the workers in this field that an international colloquium sponsored by the International Astronomical Union would be timely. To be more specific, this was due primarily to the accumulation of the new data from satellite observatories, such as the International Ultraviolet Observatory (IUE) and EXOSAT, as well as ground-based optical and radio telescopes, and the advances in modeling the putative accretion disks and the thermo-nuclear run-away phenomena in the vinicity of the white dwarf stars in cataclysmic variables. A series of workshops on this subject held in North America over the past several years and that held in Europe in 1985 had all contributed to the advances in our knowledge that led to IAU Colloguium No. 93, held in Bamberg from the 16th to 19th of June 1986. In all, 157 astronomers from 27 countries participated in this conference. Judging from the papers presented, both invited and contributed, and from the enthusiasm seen in discussions, the meeting was indeed a success.
Book Synopsis The Evolution of The Milky Way by : Francesca Matteucci
Download or read book The Evolution of The Milky Way written by Francesca Matteucci and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 605 pages. Available in PDF, EPUB and Kindle. Book excerpt: This review of the most up-to-date observational and theoretical information concerning the chemical evolution of the Milky Way compares the abundances derived from field stars and clusters, giving information on the abundances and dynamics of gas.
