Suzaku Studies of White Dwarf Stars and the Galactic X-ray Background Emission - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Suzaku Studies of White Dwarf Stars and the Galactic X-ray Background Emission write by Takayuki Yuasa. This book was released on 2013-01-16. Suzaku Studies of White Dwarf Stars and the Galactic X-ray Background Emission available in PDF, EPUB and Kindle. This thesis presents a study of the origin of an apparently extended X-ray emission associated with the Galactic ridge. The study was carried out with broadband spectra obtained from mapping observations in the Galactic bulge region conducted in 2005–2010 by the Suzaku space X-ray observatory. The spectra were analyzed with a newly constructed X-ray spectral model of an accreting white dwarf binary that is one of the proposed candidate stars for the origin of the Galactic ridge emission in the higher energy band. Fitting of the observed Galactic ridge spectra with the model showed that there is another spectral component that fills the gap between the observed X-ray flux and the component expected from the accreting white dwarf spectral model in the lower energy band. This additional soft spectral component was nicely explained by an X-ray spectral model of normal stars. The result, together with previously reported high-resolution imaging results, strongly supports the idea that the Galactic ridge X-ray emission is an assembly of dim, discrete X-ray point sources.
The Universe of Digital Sky Surveys
The Universe of Digital Sky Surveys - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook The Universe of Digital Sky Surveys write by Nicola R. Napolitano. This book was released on 2016-05-16. The Universe of Digital Sky Surveys available in PDF, EPUB and Kindle. These are the proceedings of a meeting in honour of Massimo Capaccioli at the occasion of his 70th birthday. The conference aimed at summarizing the results from the main current and past digital sky survey projects and at discussing how these can be used to inspire ongoing projects and better plan the future ones. Over the last decades, digital sky surveys performed with dedicated telescopes and finely-tuned wide-field cameras, have revolutionized astronomy. They have become the main tool to investigate the nearby and far away universe, thus providing new insights in the understanding of the galaxy structure and assembly across time, the dark components of the universe, as well as the history of our own galaxy. They have also opened the time domain leading to a new understanding of the transient phenomena in the universe. By providing public access to top quality data, digital surveys have also changed the everyday practice of astronomers who have become less dependent on direct access to large observing facilities. The full scientific exploitation of these surveys has also triggered significant advances in both space and ground based technology and in the field of multi-object spectroscopy. The various sections of this book are devoted to different relevant aspects of astrophysics in the era of digital sky surveys and include both review and shorter, more focused contributions.
A Dictionary of Astronomy
A Dictionary of Astronomy - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook A Dictionary of Astronomy write by Ian Ridpath. This book was released on 2018-04-26. A Dictionary of Astronomy available in PDF, EPUB and Kindle. Compiled with the help of over 20 expert contributors under the editorship of renowned author and broadcaster Ian Ridpath, the third edition of A Dictionary of Astronomy covers everything from space exploration and the equipment involved, to astrophysics, cosmology, and the concept of time, in over 4,300 entries. The dictionary also includes biographical entries on eminent astronomers, as well as worldwide coverage of observatories and telescopes. Supplementary material is included in the appendices, such as tables of Apollo lunar landing missions, the constellations, planetary data, and numerous other tables and diagrams complement the entries. The entries have been fully revised and updated for this edition, and more than 100 new entries have been added to reflect the recent developments within the field of astronomy, including Bennu, Euclid, Mars Orbiter Mission, and slowly pulsating B star. A Dictionary of Astronomy is an invaluable reference source for students, professionals, amateur astronomers, and space enthusiasts.
New Worlds, New Horizons in Astronomy and Astrophysics
New Worlds, New Horizons in Astronomy and Astrophysics - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook New Worlds, New Horizons in Astronomy and Astrophysics write by National Research Council. This book was released on 2011-02-04. New Worlds, New Horizons in Astronomy and Astrophysics available in PDF, EPUB and Kindle. Driven by discoveries, and enabled by leaps in technology and imagination, our understanding of the universe has changed dramatically during the course of the last few decades. The fields of astronomy and astrophysics are making new connections to physics, chemistry, biology, and computer science. Based on a broad and comprehensive survey of scientific opportunities, infrastructure, and organization in a national and international context, New Worlds, New Horizons in Astronomy and Astrophysics outlines a plan for ground- and space- based astronomy and astrophysics for the decade of the 2010's. Realizing these scientific opportunities is contingent upon maintaining and strengthening the foundations of the research enterprise including technological development, theory, computation and data handling, laboratory experiments, and human resources. New Worlds, New Horizons in Astronomy and Astrophysics proposes enhancing innovative but moderate-cost programs in space and on the ground that will enable the community to respond rapidly and flexibly to new scientific discoveries. The book recommends beginning construction on survey telescopes in space and on the ground to investigate the nature of dark energy, as well as the next generation of large ground-based giant optical telescopes and a new class of space-based gravitational observatory to observe the merging of distant black holes and precisely test theories of gravity. New Worlds, New Horizons in Astronomy and Astrophysics recommends a balanced and executable program that will support research surrounding the most profound questions about the cosmos. The discoveries ahead will facilitate the search for habitable planets, shed light on dark energy and dark matter, and aid our understanding of the history of the universe and how the earliest stars and galaxies formed. The book is a useful resource for agencies supporting the field of astronomy and astrophysics, the Congressional committees with jurisdiction over those agencies, the scientific community, and the public.
Cosmic Magnetism,
Cosmic Magnetism, - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Cosmic Magnetism, write by Percy Seymour. This book was released on 1986. Cosmic Magnetism, available in PDF, EPUB and Kindle. The study of extraterrestrial magnetic fields is a relatively new one, confirmation of the existance of the first such field (that of our Sun) having come a s late as 1908. In the past 30 years a great ammount of knowledge has been accumulated on Cosmic Magnetism, which has turned out to be a truly fascinating topic for study. Percy Seymour's book is the first to deal with the topic in a non-mathematical way, and he offers a fine introduction to his subject. The first three chapters consolidate our knowledge on magnetism in general and the magnetic field of the Earth, as well as discussing the reasons for studying astronomy and cosmic magnetism in particular. The remainder of the book is devoted to the main areas of cosmic magnetism - solar, plantetary and interplanetary fields, fields in stars and pulsars, fields of the milky way and fields in other galaxies. Cosmic Magnetism in an ideal book for sixth-formers and undergraduates studying physics or astronomy and will also appeal to amateur astronomers. as previous work on this topic has been 'hidden' in specialised academic journals.
