Galactic Centre hypershell model for the North Polar Spurs

Sofue, Y.; Habe, A.; Kataoka, J.; Totani, T.; Inoue, Y.; Nakashima, S.; Matsui, H.; Akita, M.

Galactic Centre hypershell model for the North Polar Spurs

Sofue, Y.; Habe, A.; Kataoka, J. et al.

Monthly notices of the royal astronomical society, 2016, 459(1), 108-120

Permalink : https://hdl.handle.net/2115/62354

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アクセス権	open access
URI	https://hdl.handle.net/2115/62354
タイトル	Galactic Centre hypershell model for the North Polar Spurs
著者	Sofue, Y. ; Habe, A. ; Kataoka, J. ; Totani, T. ; Inoue, Y. ; Nakashima, S. ; Matsui, H. ; Akita, M.
著者名 Sofue, Y.
著者名 Habe, A.
著者名 Kataoka, J.
著者名 Totani, T.
著者名 Inoue, Y.
著者名 Nakashima, S.
著者名 Matsui, H.
著者名 Akita, M.
言語	英語
キーワード	ISM: individual objects: (North Polar Spur)
	ISM: jets and outflows
	galaxy: nucleus
	galaxies: individual: objects (the Galaxy)
	X-rays: diffuse background
発行日	2016-06-12
出版者	Oxford University Press
収録物名	Monthly notices of the royal astronomical society
巻(号)	459(1)
ページ	108-120
抄録	The bipolar-hypershell (BHS) model for the North Polar Spurs (NPS-E, -W, and Loop I) and counter southern spurs (SPS-E and -W) is revisited based on numerical hydrodynamical simulations. Propagations of shock waves produced by energetic explosive events in the Galactic Centre are examined. Distributions of soft X-ray brightness on the sky at 0.25, 0.7, and 1.5 keV in the +/- 50 degrees x +/- 50 degrees region around the Galactic Centre are modelled by thermal emission from high-temperature plasma in the shock-compressed shell considering shadowing by the interstellar H I and H-2 gases. The result is compared with the ROSAT wide field X-ray images in R2, 4, and 6 bands. The NPS and southern spurs are well reproduced by the simulation as shadowed dumbbell-shaped shock waves. We discuss the origin and energetics of the event in relation to the starburst and/or active galactic nucleus activities in the Galactic Centre.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	This article has been accepted for publication in [Monthly notices of the Royal Astronomical Society] ©: [2016] [A. Habe] Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
PISSN	0035-8711
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1093/mnras/stw623