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  On the properties of the massive binary black hole merger GW170729

Chatziioannou, K., Cotesta, R., Ghonge, S., Lange, J., Ng, K.-K.-.-Y., Bustillo, J. C., et al. (2019). On the properties of the massive binary black hole merger GW170729. Physical Review D, 100(10): 104015. doi:10.1103/PhysRevD.100.104015.

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Chatziioannou, Katerina, Autor
Cotesta, Roberto1, Autor           
Ghonge, Sudarshan, Autor
Lange, Jacob, Autor
Ng, Ken K. -Y., Autor
Bustillo, Juan Calderon, Autor
Clark, James, Autor
Haster, Carl-Johan, Autor
Khan, Sebastian2, Autor           
Puerrer, Michael1, Autor           
Raymond, Vivien, Autor
Vitale, Salvatore, Autor
Afshari, Nousha, Autor
Babak, Stanislav, Autor
Barkett, Kevin, Autor
Blackman, Jonathan, Autor
Bohe, Alejandro, Autor
Boyle, Michael, Autor
Buonanno, Alessandra1, Autor           
Campanelli, Manuela, Autor
Carullo, Gregorio, AutorChu, Tony, AutorFlynn, Eric, AutorFong, Heather, AutorGarcia, Alyssa, AutorGiesler, Matthew, AutorHaney, Maria, AutorHannam, Mark, AutorHarry, Ian1, Autor           Healy, James, AutorHemberger, Daniel, AutorHinder, Ian, AutorJani, Karan, AutorKhamersa, Bhavesh, AutorKidder, Lawrence E., AutorKumar, Prayush, AutorLaguna, Pablo, AutorLousto, Carlos O., AutorLovelace, Geoffrey, AutorLittenberg, Tyson B., AutorLondon, Lionel, AutorMillhouse, Margaret, AutorNuttall, Laura K., AutorOhme, Frank2, Autor           O'Shaughnessy, Richard, AutorOssokine, Serguei1, Autor           Pannarale, Francesco, AutorSchmidt, Patricia, AutorPfeiffer, Harald P.1, Autor           Scheel, Mark A., AutorShao, Lijing, AutorShoemaker, Deirdre, AutorSzilagyi, Bela, AutorTaracchini, Andrea1, Autor           Teukolsky, Saul A., AutorZlochower, Yosef, Autor mehr..
Affiliations:
1Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_1933290              
2Binary Merger Observations and Numerical Relativity, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_2461691              

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Schlagwörter: General Relativity and Quantum Cosmology, gr-qc, Astrophysics, High Energy Astrophysical Phenomena, astro-ph.HE
 Zusammenfassung: We present a detailed investigation into the properties of GW170729, the
gravitational wave with the most massive and distant source confirmed to date.
We employ an extensive set of waveform models, including new improved models
that incorporate the effect of higher-order waveform modes which are
particularly important for massive systems. We find no indication of
spin-precession, but the inclusion of higher-order modes in the models results
in an improved estimate for the mass ratio of $(0.3-0.8)$ at the 90\% credible
level. Our updated measurement excludes equal masses at that level. We also
find that models with higher-order modes lead to the data being more consistent
with a smaller effective spin, with the probability that the effective spin is
greater than zero being reduced from $99\%$ to $94\%$. The 90\% credible
interval for the effective spin parameter is now $(-0.01-0.50)$. Additionally,
the recovered signal-to-noise ratio increases by $\sim0.3$ units compared to
analyses without higher-order modes. We study the effect of common spin priors
on the derived spin and mass measurements, and observe small shifts in the
spins, while the masses remain unaffected. We argue that our conclusions are
robust against systematic errors in the waveform models. We also compare the
above waveform-based analysis which employs compact-binary waveform models to a
more flexible wavelet- and chirplet-based analysis. We find consistency between
the two, with overlaps of $\sim 0.9$, typical of what is expected from
simulations of signals similar to GW170729, confirming that the data are
well-described by the existing waveform models. Finally, we study the
possibility that the primary component of GW170729 was the remnant of a past
merger of two black holes and find this scenario to be indistinguishable from
the standard formation scenario.

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 Datum: 2019-03-152019-03-202019
 Publikationsstatus: Erschienen
 Seiten: 14 pages, 8 figures, samples available at https://git.ligo.org/katerina.chatziioannou/gw170729hm_datarelease
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Titel: Physical Review D
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: 100 (10) Artikelnummer: 104015 Start- / Endseite: - Identifikator: -