On Poynting-flux-driven bubbles and shocks around merging neutron star binaries / Medvedev Mikhail V.,Loeb Abraham // MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. - 2013. - V. 431, l. 3. - P. 2737-2744.

ISSN/EISSN:

0035-8711 / нет данных

Type:

Article

Abstract:

Merging binaries of compact relativistic objects (neutron stars and black holes) are thought to be progenitors of short gamma-ray bursts and sources of gravitational waves, hence their study is of great importance for astrophysics. Because of the strong magnetic field of one or both binary members and high orbital frequencies, these binaries are strong sources of energy in the form of Poynting flux (e. g. magnetic-field-dominated outflows, relativistic leptonic winds, electromagnetic and plasma waves). The steady injection of energy by the binary forms a bubble (or a cavity) filled with matter with the relativistic equation of state, which pushes on the surrounding plasma and can drive a shock wave in it. Unlike the Sedov-von Neumann-Taylor blast wave solution for a point-like explosion, the shock wave here is continuously driven by the ever-increasing pressure inside the bubble. We calculate from the first principles the dynamics and evolution of the bubble and the shock surrounding it and predict that such systems can be observed as radio sources a few hours before and after the merger. At much later times, the shock is expected to settle on to the Sedov-von Neumann-Taylor solution, thus resembling an explosion.

Author keywords:

shock waves; binaries: close; stars: neutron; ISM: bubbles; ISM: jets and outflows MAGNETIC-INTERACTIONS; BURSTS

DOI:

10.1093/mnras/stt366

Web of Science ID:

ISI:000318347500060

Соавторы в МНС:

—

Другие поля

Поле	Значение
Month	MAY
Publisher	OXFORD UNIV PRESS
Address	GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
Language	English
Keywords-Plus	MAGNETIC-INTERACTIONS; BURSTS
Research-Areas	Astronomy \& Astrophysics
Web-of-Science-Categories	Astronomy \& Astrophysics
Author-Email	medvedev@ku.edu
Funding-Acknowledgement	DOE {[}DE-FG02-07ER54940]; NSF {[}AST-1209665, AST-0907890]; NASA {[}NNX08AL43G, NNA09DB30A]
Funding-Text	One of the authors (MVM) is grateful to Sriharsha Pothapragada for useful suggestions. We thank Tony Piro for comments. This work was supported in part by DOE grant DE-FG02-07ER54940 and NSF grant AST-1209665 (for MVM), and NSF grant AST-0907890 and NASA grants NNX08AL43G and NNA09DB30A (for AL).
Number-of-Cited-References	21
Usage-Count-Since-2013	2
Journal-ISO	Mon. Not. Roy. Astron. Soc.
Doc-Delivery-Number	136FL