KONOPLYA, Roman, Nelson Camilo POSADA AGUIRRE, Zdeněk STUCHLÍK and Olexandr ZHYDENKO. Stable Schwarzschild stars as black-hole mimickers. Physical Review D. 2019, vol. 100, No 4, p. "044027-1"-"044027-7", 7 pp. ISSN 2470-0010. Available from: https://dx.doi.org/10.1103/PhysRevD.100.044027. |
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@article{36729, author = {Konoplya, Roman and Posada Aguirre, Nelson Camilo and Stuchlík, Zdeněk and Zhydenko, Olexandr}, article_number = {4}, doi = {http://dx.doi.org/10.1103/PhysRevD.100.044027}, keywords = {Schwarzschild star; quasinormal modes; black-hole mimicker; stability}, language = {eng}, issn = {2470-0010}, journal = {Physical Review D}, title = {Stable Schwarzschild stars as black-hole mimickers}, url = {https://journals.aps.org/prd/abstract/10.1103/PhysRevD.100.044027}, volume = {100}, year = {2019} }
TY - JOUR ID - 36729 AU - Konoplya, Roman - Posada Aguirre, Nelson Camilo - Stuchlík, Zdeněk - Zhydenko, Olexandr PY - 2019 TI - Stable Schwarzschild stars as black-hole mimickers JF - Physical Review D VL - 100 IS - 4 SP - "044027-1"-"044027-7" EP - "044027-1"-"044027-7" SN - 24700010 KW - Schwarzschild star KW - quasinormal modes KW - black-hole mimicker KW - stability UR - https://journals.aps.org/prd/abstract/10.1103/PhysRevD.100.044027 L2 - https://journals.aps.org/prd/abstract/10.1103/PhysRevD.100.044027 N2 - The Schwarzschild star is an ultracompact object beyond the Buchdahl limit, which has Schwarzschild geometry outside its surface and positive pressure in the external layer which vanishes at the surface. Recently, it has been shown that the Schwarzschild star is stable against spherically symmetric perturbations. Here we study arbitrary axial nonspherical perturbations and show that the observable quasinormal modes can be as close to the Schwarzschild limit as one wishes, what makes the Schwarzschild star a very good mimicker of a black hole. The decaying time-domain profiles prove that the Schwarzschild star is stable against nonspherical perturbations as well. Another peculiar feature is the absence of echoes at the end of the ringdown. Instead we observe a nonoscillating mode which might belong to the class of algebraically special modes. At asymptotically late times, Schwarzschildian power-law tails dominate in the signal. ER -
KONOPLYA, Roman, Nelson Camilo POSADA AGUIRRE, Zdeněk STUCHLÍK and Olexandr ZHYDENKO. Stable Schwarzschild stars as black-hole mimickers. \textit{Physical Review D}. 2019, vol.~100, No~4, p.~''044027-1''-''044027-7'', 7 pp. ISSN~2470-0010. Available from: https://dx.doi.org/10.1103/PhysRevD.100.044027.
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