Suzaku Studies of White Dwarf Stars and the Galactic X-ray Background Emission PDF Download
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Author: Takayuki Yuasa
Publisher: Springer Science & Business Media
ISBN: 4431542191
Category : Science
Languages : en
Pages : 164
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Book Description
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.
Author: Takayuki Yuasa
Publisher: Springer Science & Business Media
ISBN: 4431542191
Category : Science
Languages : en
Pages : 164
Get Book Here
Book Description
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.
Author: Nihon Tenmon Gakkai
Publisher:
ISBN:
Category : Astronomy
Languages : en
Pages : 834
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Author:
Publisher:
ISBN:
Category : Gamma ray astronomy
Languages : en
Pages : 698
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Author: Cosimo Bambi
Publisher: Springer Nature
ISBN: 9811969604
Category :
Languages : en
Pages : 5912
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Author: Christian W. Fabjan
Publisher: Springer Nature
ISBN: 3030353184
Category : Heavy ions
Languages : en
Pages : 1083
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Book Description
This second open access volume of the handbook series deals with detectors, large experimental facilities and data handling, both for accelerator and non-accelerator based experiments. It also covers applications in medicine and life sciences. A joint CERN-Springer initiative, the "Particle Physics Reference Library" provides revised and updated contributions based on previously published material in the well-known Landolt-Boernstein series on particle physics, accelerators and detectors (volumes 21A, B1,B2,C), which took stock of the field approximately one decade ago. Central to this new initiative is publication under full open access
Author: Loris Magnani
Publisher: Springer
ISBN: 3662543508
Category : Science
Languages : en
Pages : 317
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Book Description
This book provides an introduction to the physics of interstellar gas in the Galaxy. It deals with the diffuse interstellar medium which supplies a complex environment for exploring the neutral gas content of a galaxy like the Milky Way and the techniques necessary for studying this non-stellar component. After an initial exposition of the phases of the interstellar medium and the role of gas in a spiral galaxy, the authors discuss the transition from atomic to molecular gas. They then consider basic radiative transfer and molecular spectroscopy with particular emphasis on the molecules useful for studying low-density molecular gas. Observational techniques for investigating the gas and the dust component of the diffuse interstellar medium throughout the electromagnetic spectrum are explored emphasizing results from the recent Herschel and Planck missions. A brief exposition on dust in the diffuse interstellar medium is followed by a discussion of molecular clouds in general and high-latitude molecular clouds in particular. Ways of calibrating CO observations with the molecular hydrogen content of a cloud are examined along with the dark molecular gas controversy. High-latitude molecular clouds are considered in detail as vehicles for applying the techniques developed in the book. Given the transient nature of diffuse and translucent molecular clouds, the role of turbulence in the origin and dynamics of these objects is examined in some detail. The book is targeted at graduate students or postdocs who are entering the field of interstellar medium studies.
Author: George Ogden Abell
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 780
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Author: Frederick Lamb
Publisher: Benjamin-Cummings Publishing Company
ISBN:
Category : Science
Languages : en
Pages : 520
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Author: Steven Ritz
Publisher: American Institute of Physics
ISBN:
Category : Science
Languages : en
Pages : 640
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Book Description
The GLAST Symposia provide a forum for the exchange of information across a broad range of scientific investigations. GLAST, NASA's new gamma-ray observatory, opens a new window into the universe. GLAST data will enable scientists to answer questions that arise within a broad range of topics, including super massive black hole systems, pulsars, gamma-ray bursts, the origin of cosmic rays, and searches for signals of new physics.
Author: Fulvio Melia
Publisher: Princeton University Press
ISBN: 9780691131290
Category : Science
Languages : en
Pages : 324
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