Electronic Resource

Suzaku studies of white dwarf stars and the galactic x-ray background emission

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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.

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Ketersediaan

Informasi Detail

Judul Seri

Springer Theses

No. Panggil

E1796

Penerbit

Tokyo : Springer Tokyo., 2013

Deskripsi Fisik

xv, 154 hlm.

Bahasa

English

ISBN/ISSN

978-4-431-54219-3

Klasifikasi

NONE

Tipe Isi

text

Tipe Media

computer

Tipe Pembawa

online resource

Edisi

-

Subjek

Astronomi
Teknik dan Pengamatan : Astronomi
Suzaku : Observatorium Luar Angkasa

Info Detail Spesifik

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Pernyataan Tanggungjawab

Takayuki Yuasa

Versi lain/terkait

Lampiran Berkas

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