DYNAMICS OF ASTROPHYSICAL BUBBLES AND BUBBLE-DRIVEN SHOCKS: BASIC THEORY, ANALYTICAL SOLUTIONS, AND OBSERVATIONAL SIGNATURES / Medvedev Mikhail V.,Loeb Abraham // ASTROPHYSICAL JOURNAL. - 2013. - V. 768, l. 2.

ISSN/EISSN:

0004-637X / нет данных

Type:

Article

Abstract:

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 proportional to(t/t(s))(p) (with p and t(s) being constants) and the finite activity time case, L proportional to (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.

Author keywords:

ISM: bubbles; ISM: jets and outflows; shock waves WIND BUBBLES; SUPERBUBBLES; EMISSION; STARS

DOI:

10.1088/0004-637X/768/2/113

Web of Science ID:

ISI:000318228400016

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	MAY 10
Publisher	IOP PUBLISHING LTD
Address	TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
Language	English
Article-Number	113
Keywords-Plus	WIND BUBBLES; SUPERBUBBLES; EMISSION; STARS
Research-Areas	Astronomy \& Astrophysics
Web-of-Science-Categories	Astronomy \& Astrophysics
Funding-Acknowledgement	DOE {[}DE-FG02-07ER54940]; NSF {[}AST-1209665, AST-0907890]; NASA {[}NNX08AL43G, NNA09DB30A]
Funding-Text	One of the authors (M.V.M.) is grateful to Sriharsha Pothapragada for useful suggestions. This work was supported in part by DOE grant DE-FG02-07ER54940 and NSF grant AST-1209665 (for M.V.M.), and NSF grant AST-0907890 and NASA grants NNX08AL43G and NNA09DB30A (for A.L.).
Number-of-Cited-References	16
Usage-Count-Since-2013	5
Journal-ISO	Astrophys. J.
Doc-Delivery-Number	134QK