KONOPLYA, Roman, Zdeněk STUCHLÍK and Olexandr ZHYDENKO. Echoes of compact objects: New physics near the surface and matter at a distance. Physical Review D. 2019, vol. 99, No 2, p. "024007-1"-" 024007-5", 5 pp. ISSN 2470-0010. Available from: https://dx.doi.org/10.1103/PhysRevD.99.024007.
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Basic information
Original name Echoes of compact objects: New physics near the surface and matter at a distance
Authors KONOPLYA, Roman (804 Ukraine, guarantor, belonging to the institution), Zdeněk STUCHLÍK (203 Czech Republic, belonging to the institution) and Olexandr ZHYDENKO (804 Ukraine, belonging to the institution).
Edition Physical Review D, 2019, 2470-0010.
Other information
Original language English
Type of outcome Article in a journal
Field of Study 10308 Astronomy
Country of publisher United States of America
Confidentiality degree is not subject to a state or trade secret
WWW URL
RIV identification code RIV/47813059:19240/19:A0000517
Organization unit Faculty of Philosophy and Science in Opava
Doi http://dx.doi.org/10.1103/PhysRevD.99.024007
UT WoS 000454769400006
Keywords in English compact objects; echoes; new physics
Tags FÚ, HighlyCitedPaper, RCTPA, RIVOK
Tags International impact, Reviewed
Changed by Changed by: Ing. Petra Skoumalová, učo 50554. Changed: 21/4/2020 11:33.
Abstract
It is well known that a hypothetical compact object that looks like an Einsteinian (Schwarzschild or Kerr) black hole everywhere except a small region near its surface should have the ringdown profile predicted by the Einstein theory at early and intermediate times, but modified by the so-called echoes at late times. A similar phenomenon appears when one considers an Einsteinian black hole and a shell of matter placed at some distance from it, so that astrophysical estimates could be made for the allowed mass of the black hole environment. While echoes for both systems have been extensively studied recently, no such analysis has been done for a system featuring phenomena simultaneously, that is, echoes due to new physics near the surface/event horizon and echoes due to matter at some distance from the black hole. Here, following Damour and Solodukhin [Phys. Rev. D 76, 024016 (2007)] and Cardoso et al. [Phys. Rev. Lett. 116, 171101 (2016)], we consider a traversable wormhole obtained by identifying two Schwarzschild metrics with the same mass M at the throat, which is near the Schwarzschild radius, and add a nonthin shell of matter at a distance. This allows us to understand how the echoes of the surface of the compact object arc affected by the astrophysical environment at a distance. The straightforward calculations for the time-domain profiles of such a system support the expectations that if the echoes are observed, they should most probably be ascribed to some new physics near the event horizon rather than some "environmental" effect.
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