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.

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.

収録刊行物

• Monthly notices of the royal astronomical society

  Monthly notices of the royal astronomical society 459 (1), 108-120, 2016-06-12

  Oxford University Press

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

詳細情報

• CRID: 1050001339020551168
• NII論文ID: 120005773974
• HANDLE: 2115/62354
• ISSN: 00358711
• 本文言語コード: en
• 資料種別: journal article
• データソース種別:
  • IRDB
  • CiNii Articles