Multi-wavelength emission from the Fermi bubbles. I. Stochastic acceleration from background plasma

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/101230

Title:	Multi-wavelength emission from the Fermi bubbles. I. Stochastic acceleration from background plasma
Authors:	高仲明;Cheng, K. S.;Chernyshov, D. O.;Dogiel, V. A.;Ko, C. M.
Contributors:	理學院天文研究所
Keywords:	ACCELERATION;ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;BLACK HOLES;Bubbles;EMISSION;GALAXIES;GAMMA RADIATION;Gamma rays;LIFETIME;Mathematical models;Origins;PLASMA;Radio;STARS;STOCHASTIC PROCESSES;Stochasticity;SUPERNOVA REMNANTS;SYNCHROTRON RADIATION;TURBULENCE;WAVELENGTHS
Date:	2014-07-20
Issue Date:	2026-04-21 14:27:48 (UTC+8)
Publisher:	IOP Publishing Ltd.;United States: American Astronomical Society
Abstract:	摘要： We analyze processes of electron acceleration in the Fermi bubbles in order to define parameters and restrictions of the models, which are suggested for the origin of these giant radio and gamma-ray structures. In the case of the leptonic origin of the nonthermal radiation from the bubbles, these electrons should be produced somehow in situ because of the relatively short lifetime of high-energy electrons, which lose their energy by synchrotron and inverse-Compton processes. It has been suggested that electrons in bubbles may be accelerated by shocks produced by tidal disruption of stars accreting onto the central black hole or a process of re-acceleration of electrons ejected by supernova remnants. These processes will be investigated in subsequent papers. In this paper, we focus on in situ stochastic (Fermi) acceleration by a hydromagnetic/supersonic turbulence, in which electrons can be directly accelerated from the background plasma. We showed that the acceleration from the background plasma is able to explain the observed fluxes of radio and gamma-ray emission from the bubbles, but the range of permitted parameters of the model is strongly restricted. 出版者： United States: American Astronomical Society 出版日期： 2014-07-20 出處： The Astrophysical Journal, 2014-07, Vol.790 (1), p.23--9 資源來源： Institute of Physics Journals 識別號： ISSN: 0004-637X 識別號： ISSN: 1538-4357 識別號： EISSN: 1538-4357 識別號： DOI: 10.1088/0004-637x/790/1/23
Appears in Collections:	[Graduate Institute of Astronomy] journal & Dissertation

Files in This Item:

File	Description	Size	Format
index.html		0Kb	HTML	24	View/Open

社群 sharing

Loading...