DYNAMICS OF ASTROPHYSICAL BUBBLES AND BUBBLE-DRIVEN SHOCKS: BASIC THEORY, ANALYTICAL SOLUTIONS, AND OBSERVATIONAL SIGNATURES
Open accessAbstract
Bubbles in the interstellar medium are produced by astrophysical sources, which continuously or explosively deposit large amounts of energy into the ambient medium. These expanding bubbles can drive shocks in front of them, the dynamics of which is markedly different from the widely used Sedov–von Neumann–Taylor blast wave solution. Here, we present the theory of a bubble-driven shock and show how its properties and evolution are determined by the temporal history of the source energy output, generally referred to as the source luminosity law , L ( t ). In particular, we find the analytical solutions for a driven shock in two cases: the self-similar scaling law, L ∝( t / t s ) p (with p and t s being constants) and the finite activity time case, L ∝(1 − t / t s ) − p . The latter with p > 0 describes a finite-time-singular behavior, which is relevant to a wide variety of systems with explosive-type energy release. For both luminosity laws, we derived the conditions needed for the driven shock to exist and predict the shock observational signatures. Our results can be relevant to stellar systems with strong winds, merging neutron star/magnetar/black hole systems, and massive stars evolving to supernovae explosions.
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As the wall advances into ambient radiation with energy density ρ_m, a shock wave forms; the shocked fluid is initially at rest in the wall frame and its proper density is of order ρ_s ~ γ^2 ρ_m, where γ is the Lorentz factor of the shocked fluid relative to the ambient.
“As the wall advances into ambient radiation with energy density ρ m , a shock wave forms.The shocked fluid is initially at rest in the frame of the wall, and its proper density is of order ρ s ∼ γ 2 ρ m , where γ is the Lorentz factor of the shocked fluid relative to the ambient [11].”
From Black holes and the multiverse (2016) · cites this paper as [11]
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Research works printed but not linked: 13
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Black holes and the multiverse
Garriga, J., Vilenkin, A., & Zhang, J. (2016) · Journal of Cosmology and Astroparticle Physics · doi:10.1088/1475-7516/2016/02/064 · Cited by 173 · see citing works
- Authors
- Medvedev, M. V., & Loeb, A.
- Affiliations
- Harvard University (US)
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 2013-04-19
- Volume
- 768
- Issue
- 2
- Pages
- 113
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2037522306
- Cited by
- 9
- References
- 0
- Citations by year
- 2024: 1 · 2020: 1 · 2019: 2 · 2018: 1 · 2017: 1 · 2016: 1 · 2014: 1 · 2013: 1
- FWCI
- 0.54
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- The Astrophysical Journal (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- Digital Access to Scholarship at Harvard (DASH) (Harvard University) (submittedVersion, cc-by)
- arXiv (Cornell University)
- AAS/High Energy Astrophysics Division #13
- Topics
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astrophysics and Star Formation Studies
- Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › Astrophysics and Cosmic Phenomena
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Gamma-ray bursts and supernovae
- Keywords
- interstellar medium, self-similar scaling, blow-up, stellar winds, black hole mergers, supernovae
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