TY - JOUR
T1 - Galactic Centre hypershell model for the North Polar Spurs
AU - Sofue, Y.
AU - Habe, A.
AU - Kataoka, J.
AU - Totani, T.
AU - Inoue, Y.
AU - Nakashima, S.
AU - Matsui, H.
AU - Akita, M.
N1 - Publisher Copyright:
© 2016 The Authors.
Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2016/6/11
Y1 - 2016/6/11
N2 - 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° × ±50° 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 H2 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.
AB - 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° × ±50° 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 H2 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.
KW - Galaxies: individual: objects (the Galaxy)
KW - Galaxy: Nucleus
KW - ISM: Individual objects: (North Polar Spur)
KW - ISM: Jets and outflows
KW - X-rays: diffuse background
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U2 - 10.1093/mnras/stw623
DO - 10.1093/mnras/stw623
M3 - Article
AN - SCOPUS:84969920914
VL - 459
SP - 108
EP - 120
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
SN - 0035-8711
IS - 1
ER -