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Galactic Centre hypershell model for the North Polar Spurs
| Title: | Galactic Centre hypershell model for the North Polar Spurs |
| Authors: | Sofue, Y. Browse this author | | Habe, A. Browse this author | | Kataoka, J. Browse this author | | Totani, T. Browse this author | | Inoue, Y. Browse this author | | Nakashima, S. Browse this author | | Matsui, H. Browse this author | | Akita, M. Browse this author |
| Keywords: | ISM: individual objects: (North Polar Spur) | | ISM: jets and outflows | | galaxy: nucleus | | galaxies: individual: objects (the Galaxy) | | X-rays: diffuse background |
| Issue Date: | 12-Jun-2016 |
| Publisher: | Oxford University Press |
| Journal Title: | Monthly notices of the royal astronomical society |
| Volume: | 459 |
| Issue: | 1 |
| Start Page: | 108 |
| End Page: | 120 |
| Publisher DOI: | 10.1093/mnras/stw623 |
| Abstract: | 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. |
| Rights: | 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. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/62354 |
| Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 羽部 朝男
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