Details
| Original language | English |
|---|---|
| Article number | 082006 |
| Number of pages | 34 |
| Journal | Physical Review D |
| Volume | 108 |
| Issue number | 8 |
| Publication status | Published - 23 Oct 2023 |
Abstract
Using simple, intuitive arguments, we discuss the expected accuracy with which astrophysical parameters can be extracted from an observed gravitational wave signal. The observation of a chirplike signal in the data allows for measurement of the component masses and aligned spins, while measurement in three or more detectors enables good localization. The ability to measure additional features in the observed signal - the existence or absence of power in (i) the second gravitational wave polarization, (ii) higher gravitational wave multipoles or (iii) spin-induced orbital precession - provide new information which can be used to significantly improve the accuracy of parameter measurement. We introduce the simple-pe algorithm which uses these methods to generate rapid parameter estimation results for binary mergers. We present results from a set of simulations, to illustrate the method, and compare results from simple-pe with measurements from full parameter estimation routines. The simple-pe routine is able to provide initial parameter estimates in a matter of CPU minutes, which could be used in real-time alerts and also as input to significantly accelerate detailed parameter estimation routines.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Nuclear and High Energy Physics
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: Physical Review D, Vol. 108, No. 8, 082006, 23.10.2023.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Simple parameter estimation using observable features of gravitational-wave signals
AU - Fairhurst, Stephen
AU - Hoy, Charlie
AU - Green, Rhys
AU - Mills, Cameron
AU - Usman, Samantha A.
N1 - Funding Information: We thank Tom Dent, Ilya Mandel, Frank Ohme, Javier Roulet, Rory Smith, Eric Thrane, Veronica Villa, and Barak Zackay for useful discussions and suggestions. We thank Ben Farr and Javier Roulet for detailed comments on an earlier draft of the paper. We thank Mark Hannam and Vivien Raymond for continued discussions and insights throughout this project. S. F., R. G., C. H., C. M., and S. U. thank STFC for support through the Grants No. ST/V005618/1 and No. ST/N005430/1. C. H. thanks the UKRI Future Leaders Fellowship for support through Grant No. MR/T01881X/1. S. F. was supported by a Leverhulme Trust International Fellowship. The authors are also grateful for computational resources provided by LIGO Laboratory and supported by National Science Foundation Grants No. PHY-0757058 and No. PHY-0823459 and provided by Cardiff University, and funded by STFC Grant No. ST/I006285/1. simple-pe is programmed in p ython and utilizes modules from n um p y , s ci p y , p y cbc and pes ummary . Plots were prepared with m atplotlib , and pes ummary . As part of this paper, the parallel-bilby parameter estimation software , which made use of the dynesty nesting sampling package , was used for comparisons.
PY - 2023/10/23
Y1 - 2023/10/23
N2 - Using simple, intuitive arguments, we discuss the expected accuracy with which astrophysical parameters can be extracted from an observed gravitational wave signal. The observation of a chirplike signal in the data allows for measurement of the component masses and aligned spins, while measurement in three or more detectors enables good localization. The ability to measure additional features in the observed signal - the existence or absence of power in (i) the second gravitational wave polarization, (ii) higher gravitational wave multipoles or (iii) spin-induced orbital precession - provide new information which can be used to significantly improve the accuracy of parameter measurement. We introduce the simple-pe algorithm which uses these methods to generate rapid parameter estimation results for binary mergers. We present results from a set of simulations, to illustrate the method, and compare results from simple-pe with measurements from full parameter estimation routines. The simple-pe routine is able to provide initial parameter estimates in a matter of CPU minutes, which could be used in real-time alerts and also as input to significantly accelerate detailed parameter estimation routines.
AB - Using simple, intuitive arguments, we discuss the expected accuracy with which astrophysical parameters can be extracted from an observed gravitational wave signal. The observation of a chirplike signal in the data allows for measurement of the component masses and aligned spins, while measurement in three or more detectors enables good localization. The ability to measure additional features in the observed signal - the existence or absence of power in (i) the second gravitational wave polarization, (ii) higher gravitational wave multipoles or (iii) spin-induced orbital precession - provide new information which can be used to significantly improve the accuracy of parameter measurement. We introduce the simple-pe algorithm which uses these methods to generate rapid parameter estimation results for binary mergers. We present results from a set of simulations, to illustrate the method, and compare results from simple-pe with measurements from full parameter estimation routines. The simple-pe routine is able to provide initial parameter estimates in a matter of CPU minutes, which could be used in real-time alerts and also as input to significantly accelerate detailed parameter estimation routines.
UR - http://www.scopus.com/inward/record.url?scp=85178270508&partnerID=8YFLogxK
U2 - 10.48550/arXiv.2304.03731
DO - 10.48550/arXiv.2304.03731
M3 - Article
AN - SCOPUS:85178270508
VL - 108
JO - Physical Review D
JF - Physical Review D
SN - 2470-0010
IS - 8
M1 - 082006
ER -