Analysis of Ringdown Overtones in GW150914
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Analysis of Ringdown Overtones in GW150914. / Cotesta, Roberto; Carullo, Gregorio; Berti, Emanuele; Cardoso, Vitor.
I: Physical Review Letters, Bind 129, Nr. 11, 111102, 09.09.2022.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Analysis of Ringdown Overtones in GW150914
AU - Cotesta, Roberto
AU - Carullo, Gregorio
AU - Berti, Emanuele
AU - Cardoso, Vitor
PY - 2022/9/9
Y1 - 2022/9/9
N2 - We analyze GW150914 postmerger data to understand if ringdown overtone detection claims are robust. We find no evidence in favor of an overtone in the data after the waveform peak. Around the peak, the Bayes factor does not indicate the presence of an overtone, while the support for a nonzero amplitude is sensitive to changes in the starting time much smaller than the overtone damping time. This suggests that claims of an overtone detection are noise dominated. We perform GW150914-like injections in neighboring segments of the real detector noise, and we show that noise can indeed induce artificial evidence for an overtone.
AB - We analyze GW150914 postmerger data to understand if ringdown overtone detection claims are robust. We find no evidence in favor of an overtone in the data after the waveform peak. Around the peak, the Bayes factor does not indicate the presence of an overtone, while the support for a nonzero amplitude is sensitive to changes in the starting time much smaller than the overtone damping time. This suggests that claims of an overtone detection are noise dominated. We perform GW150914-like injections in neighboring segments of the real detector noise, and we show that noise can indeed induce artificial evidence for an overtone.
KW - COLLAPSING RELATIVISTIC STARS
KW - GRAVITATIONAL-WAVES
KW - RADIATION
U2 - 10.1103/PhysRevLett.129.111102
DO - 10.1103/PhysRevLett.129.111102
M3 - Journal article
C2 - 36154425
VL - 129
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 11
M1 - 111102
ER -
ID: 323158675