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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Did GW150914 produce a rotating gravastar?

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Chirenti, Cecilia ; Rezzolla, Luciano
Total Authors: 2
Document type: Journal article
Source: Physical Review D; v. 94, n. 8 OCT 11 2016.
Web of Science Citations: 47

The interferometric LIGO detectors have recently measured the first direct gravitational-wave signal from what has been interpreted as the inspiral, merger and ringdown of a binary system of black holes. The signal-to-noise ratio of the measured signal is large enough to leave little doubt that it does refer to the inspiral of two massive and ultracompact objects, whose merger yields a rotating black hole. Yet, the quality of the data is such that some room is left for alternative interpretations that do not involve black holes, but other objects that, within classical general relativity, can be equally massive and compact, namely, gravastars. We here consider the hypothesis that the merging objects were indeed gravastars and explore whether the merged object could therefore be not a black hole but a rotating gravastar. After comparing the real and imaginary parts of the ringdown signal of GW150914 with the corresponding quantities for a variety of gravastars, and notwithstanding the very limited knowledge of the perturbative response of rotating gravastars, we conclude it is not possible to model the measured ringdown of GW150914 as due to a rotating gravastar. (AU)

FAPESP's process: 15/20433-4 - Relativistic Astrophysics and Gravitational Waves
Grantee:Cecilia Bertoni Martha Hadler Chirenti
Support type: Regular Research Grants