On the detection of high-frequency oscillations in short gamma-ray bursts
In this work we present the results of an investigation aimed at a search for an oscillatory phenomenon during short gamma‐ray bursts. The wavelet technique, used for this analysis, is applied to the data from the BATSE 3B catalogue. We have detected oscillations, which periods are found to be in th...
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Published in | Astronomische Nachrichten Vol. 330; no. 4; pp. 404 - 410 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
Berlin
WILEY-VCH Verlag
01.05.2009
WILEY‐VCH Verlag |
Subjects | |
Online Access | Get full text |
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Summary: | In this work we present the results of an investigation aimed at a search for an oscillatory phenomenon during short gamma‐ray bursts. The wavelet technique, used for this analysis, is applied to the data from the BATSE 3B catalogue. We have detected oscillations, which periods are found to be in the milliseconds range and their amplitudes up to dozens of percents. A possible scenario for such a phenomenon is the coalescence of stellar‐mass black holes and neutron stars. During the coalescence process the matter orbiting the black hole produces rapid, periodic phenomena. Such system will also emit gravitational waves which cause the orbital radius to decrease and leads to the emission of a chirp of radiation. Estimates lead to a timescale of milliseconds for the coalescence process and oscillation frequencies of hundreds of Hz. The gamma‐ray bursts considered in this paper, show both frequencies and survival times of oscillations close to the mentioned values. A chirp phenomenon is also present. We therefore argue in favor of the black hole – neutron star coalescence as a scenario for the production of short gamma‐ray bursts (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) |
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Bibliography: | istex:2C12055BD31F4BBD086B6BB9C14B1BDA9806B523 ark:/67375/WNG-FDDNT8RC-R ArticleID:ASNA200711135 |
ISSN: | 0004-6337 1521-3994 |
DOI: | 10.1002/asna.200711135 |