scholarly journals Characterizing the Observation Bias in Gravitational-wave Detections and Finding Structured Population Properties

2021 ◽  
Vol 922 (2) ◽  
pp. 258
Author(s):  
Doğa Veske ◽  
Imre Bartos ◽  
Zsuzsa Márka ◽  
Szabolcs Márka
Keyword(s):  
Black Hole ◽  
Gravitational Wave ◽  
Computational Cost ◽  
Data Sets ◽  
Selection Effects ◽  
Analytical Formulation ◽  
Structured Population ◽  
Binary Black Hole ◽  
Observation Bias ◽  
Two Peaks

Abstract The observed distributions of the source properties from gravitational-wave (GW) detections are biased due to the selection effects and detection criteria in the detections, analogous to the Malmquist bias. In this work, this observation bias is investigated through its fundamental statistical and physical origins. An efficient semi-analytical formulation for its estimation is derived, which is as accurate as the standard method of numerical simulations, with only a millionth of the computational cost. Then, the estimated bias is used for unmodeled inferences on the binary black hole population. These inferences show additional structures, specifically two peaks in the joint mass distribution around binary masses ∼10 M ⊙ and ∼30 M ⊙. Example ready-to-use scripts and some produced data sets for this method are shared in an online repository.

scholarly journals Implications of Eccentric Observations on Binary Black Hole Formation Channels

2021 ◽  
Vol 921 (2) ◽  
pp. L43
Author(s):  
Michael Zevin ◽  
Isobel M. Romero-Shaw ◽  
Kyle Kremer ◽  
Eric Thrane ◽  
Paul D. Lasky
Keyword(s):  
Black Hole ◽  
Gravitational Wave ◽  
State Of The Art ◽  
Star Clusters ◽  
Selection Effects ◽  
Orbital Eccentricity ◽  
Hole Formation ◽  
Local Universe ◽  
Binary Black Holes ◽  
Binary Black Hole

Abstract Orbital eccentricity is one of the most robust discriminators for distinguishing between dynamical and isolated formation scenarios of binary black hole mergers using gravitational-wave observatories such as LIGO and Virgo. Using state-of-the-art cluster models, we show how selection effects impact the detectable distribution of eccentric mergers from clusters. We show that the observation (or lack thereof) of eccentric binary black hole mergers can significantly constrain the fraction of detectable systems that originate from dynamical environments, such as dense star clusters. After roughly 150 observations, observing no eccentric binary signals would indicate that clusters cannot make up the majority of the merging binary black hole population in the local universe (95% credibility). However, if dense star clusters dominate the rate of eccentric mergers and a single system is confirmed to be measurably eccentric in the first and second gravitational-wave transient catalogs, clusters must account for at least 14% of detectable binary black hole mergers. The constraints on the fraction of detectable systems from dense star clusters become significantly tighter as the number of eccentric observations grows and will be constrained to within 0.5 dex once 10 eccentric binary black holes are observed.

scholarly journals Optimization of model independent gravitational wave search for binary black hole mergers using machine learning

2021 ◽  
Vol 104 (2) ◽  
Author(s):  
T. Mishra ◽  
B. O’Brien ◽  
V. Gayathri ◽  
M. Szczepańczyk ◽  
S. Bhaumik ◽  
...  
Keyword(s):  
Machine Learning ◽  
Black Hole ◽  
Gravitational Wave ◽  
Binary Black Hole ◽  
Model Independent

scholarly journals MAGIC electromagnetic follow-up of gravitational wave alerts

2016 ◽  
Vol 12 (S324) ◽  
pp. 287-290
Author(s):  
Barbara De Lotto ◽  
Stefano Ansoldi ◽  
Angelo Antonelli ◽  
Alessio Berti ◽  
Alessandro Carosi ◽  
...  
Keyword(s):  
Black Hole ◽  
Data Analysis ◽  
Gravitational Wave ◽  
Laser Interferometer ◽  
Cherenkov Telescopes ◽  
Direct Observations ◽  
Binary Black Hole ◽  
Set Up

AbstractThe year 2015 witnessed the first direct observations of a transient gravitational-wave (GW) signal from binary black hole mergers by the Advanced Laser Interferometer Gravitational-wave Observatory (aLIGO) Collaboration with the Virgo Collaboration. The MAGIC two 17m diameter Cherenkov telescopes system joined since 2014 the vast collaboration of electromagnetic facilities for follow-up of gravitational wave alerts. During the 2015 LIGO-Virgo science run we set up the procedure for GW alerts follow-up and took data following the last GW alert. MAGIC results on the data analysis and prospects for the forthcoming run are presented.

scholarly journals Extraction of binary black hole gravitational wave signals from detector data using deep learning

2021 ◽  
Vol 104 (6) ◽  
Author(s):  
Chayan Chatterjee ◽  
Linqing Wen ◽  
Foivos Diakogiannis ◽  
Kevin Vinsen
Keyword(s):  
Black Hole ◽  
Deep Learning ◽  
Gravitational Wave ◽  
Binary Black Hole

scholarly journals Accuracy of Estimating Highly Eccentric Binary Black Hole Parameters with Gravitational-wave Detections

2018 ◽  
Vol 855 (1) ◽  
pp. 34 ◽  
Author(s):  
László Gondán ◽  
Bence Kocsis ◽  
Péter Raffai ◽  
Zsolt Frei
Keyword(s):  
Black Hole ◽  
Gravitational Wave ◽  
Binary Black Hole

scholarly journals The astrophysical odds of GW151216

2020 ◽  
Vol 498 (2) ◽  
pp. 1905-1910 ◽  
Author(s):  
Gregory Ashton ◽  
Eric Thrane
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Gravitational Wave ◽  
Bayesian Method ◽  
Massive Stars ◽  
Stellar Mass ◽  
Population Analyses ◽  
Wave Detection ◽  
Binary Black Hole ◽  
Bona Fide

ABSTRACT The gravitational-wave candidate GW151216 is a proposed binary black hole event from the first observing run of the Advanced LIGO detectors. Not identified as a bona fide signal by the LIGO–Virgo collaboration, there is disagreement as to its authenticity, which is quantified by pastro, the probability that the event is astrophysical in origin. Previous estimates of pastro from different groups range from 0.18 to 0.71, making it unclear whether this event should be included in population analyses, which typically require pastro > 0.5. Whether GW151216 is an astrophysical signal or not has implications for the population properties of stellar-mass black holes and hence the evolution of massive stars. Using the astrophysical odds, a Bayesian method that uses the signal coherence between detectors and a parametrized model of non-astrophysical detector noise, we find that pastro = 0.03, suggesting that GW151216 is unlikely to be a genuine signal. We also analyse GW150914 (the first gravitational-wave detection) and GW151012 (initially considered to be an ambiguous detection) and find pastro values of 1 and 0.997, respectively. We argue that the astrophysical odds presented here improve upon traditional methods for distinguishing signals from noise.

scholarly journals Impact of subdominant modes on the interpretation of gravitational-wave signals from heavy binary black hole systems

2020 ◽  
Vol 101 (12) ◽  
Author(s):  
Feroz H. Shaik ◽  
Jacob Lange ◽  
Scott E. Field ◽  
Richard O’Shaughnessy ◽  
Vijay Varma ◽  
...  
Keyword(s):  
Black Hole ◽  
Gravitational Wave ◽  
Binary Black Hole

scholarly journals Sensitivity comparison of searches for binary black hole coalescences with ground-based gravitational-wave detectors

2014 ◽  
Vol 90 (2) ◽  
Author(s):  
Satya Mohapatra ◽  
Laura Cadonati ◽  
Sarah Caudill ◽  
James Clark ◽  
Chad Hanna ◽  
...  
Keyword(s):  
Black Hole ◽  
Gravitational Wave ◽  
Binary Black Hole ◽  
Gravitational Wave Detectors

Electromagnetic counterpart to gravitational waves from coalescence of binary black hole with magnetic monopole charge

2020 ◽  
Vol 35 (31) ◽  
pp. 2050205
Author(s):  
Aung Naing Win ◽  
Yu-Ming Chu ◽  
Hasrat Hussain Shah ◽  
Syed Zaheer Abbas ◽  
Munawar Shah
Keyword(s):  
Black Hole ◽  
Dipole Moment ◽  
Gravitational Wave ◽  
Gravitational Waves ◽  
Short Duration ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Magnetic Monopole ◽  
Compact Object ◽  
Binary Black Hole

A Satellite Fermi GBM detected recent putative short Gamma Ray Bursts (GRBs) in coincident with the gravitational wave signal GW 150914 produced by the merger of binary black hole (BH). If at least one BH possess magnetic monopole charge in the binary BH system then the short-duration GRBs may produce during the final phase of a binary BH merger. The detection of gravitational waves GW 150914, GW 151226 and LVT 151012 by LIGO gave the evidence that merging of the compact object like binary BH often happens in our universe. In this paper, we report the qualitative model to discuss the generation of electromagnetic radiation from the merging of two BHs with equal masses and at least one BH carrying the magnetic monopole charge in the binary system. In this model, BH possess a magnetic monopole charge that may not be neutralized before the coalescence. During the inspiralling process, the magnetic monopole charge on the BH would produced the electric dipole moment. Short duration GRB would produce by the rapidly evolution of the electric dipole moment which may detectable on Earth. We predict that this model would be beneficial in the future to explain the generation of gravitational wave (GW) plus a electromagnetic signal of multi-wavelength from mergers of magnetically charged BHs.

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