Search for the isotropic stochastic background using data from Advanced LIGO's second observing run

(LIGO Scientific and Virgo Collaboration)

doi:10.1103/PhysRevD.100.061101

Search for the isotropic stochastic background using data from Advanced LIGO's second observing run

(LIGO Scientific and Virgo Collaboration)

(Astro)-Particles Physics

Research output: Contribution to Journal › Article › Academic › peer-review

Abstract

The stochastic gravitational-wave background is a superposition of sources that are either too weak or too numerous to detect individually. In this study, we present the results from a cross-correlation analysis on data from Advanced LIGO's second observing run (O2), which we combine with the results of the first observing run (O1). We do not find evidence for a stochastic background, so we place upper limits on the normalized energy density in gravitational waves at the 95% credible level of ωGW<6.0×10-8 for a frequency-independent (flat) background and ωGW<4.8×10-8 at 25 Hz for a background of compact binary coalescences. The upper limit improves over the O1 result by a factor of 2.8. Additionally, we place upper limits on the energy density in an isotropic background of scalar- and vector-polarized gravitational waves, and we discuss the implication of these results for models of compact binaries and cosmic string backgrounds. Finally, we present a conservative estimate of the correlated broadband noise due to the magnetic Schumann resonances in O2, based on magnetometer measurements at both the LIGO Hanford and LIGO Livingston observatories. We find that correlated noise is well below the O2 sensitivity.

Original language	English
Article number	061101
Pages (from-to)	1-16
Number of pages	16
Journal	Physical Review D
Volume	100
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevD.100.061101
Publication status	Published - 4 Sep 2019

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10.1103/PhysRevD.100.061101

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@article{98814c4fd84d4e188153ca071debf7bf,

title = "Search for the isotropic stochastic background using data from Advanced LIGO's second observing run",

abstract = "The stochastic gravitational-wave background is a superposition of sources that are either too weak or too numerous to detect individually. In this study, we present the results from a cross-correlation analysis on data from Advanced LIGO's second observing run (O2), which we combine with the results of the first observing run (O1). We do not find evidence for a stochastic background, so we place upper limits on the normalized energy density in gravitational waves at the 95% credible level of ωGW<6.0×10-8 for a frequency-independent (flat) background and ωGW<4.8×10-8 at 25 Hz for a background of compact binary coalescences. The upper limit improves over the O1 result by a factor of 2.8. Additionally, we place upper limits on the energy density in an isotropic background of scalar- and vector-polarized gravitational waves, and we discuss the implication of these results for models of compact binaries and cosmic string backgrounds. Finally, we present a conservative estimate of the correlated broadband noise due to the magnetic Schumann resonances in O2, based on magnetometer measurements at both the LIGO Hanford and LIGO Livingston observatories. We find that correlated noise is well below the O2 sensitivity.",

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Yvert and Zadro{\.z}ny, {A. K.} and M. Zanolin and T. Zelenova and Zendri, {J. P.} and M. Zevin and J. Zhang and L. Zhang and T. Zhang and C. Zhao and M. Zhou and Z. Zhou and Zhu, {X. J.} and Zucker, {M. E.} and J. Zweizig and {(LIGO Scientific and Virgo Collaboration)}",

year = "2019",

month = sep,

day = "4",

doi = "10.1103/PhysRevD.100.061101",

language = "English",

volume = "100",

pages = "1--16",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

number = "6",

}

TY - JOUR

T1 - Search for the isotropic stochastic background using data from Advanced LIGO's second observing run

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AU - Zweizig, J.

AU - (LIGO Scientific and Virgo Collaboration)

PY - 2019/9/4

Y1 - 2019/9/4

N2 - The stochastic gravitational-wave background is a superposition of sources that are either too weak or too numerous to detect individually. In this study, we present the results from a cross-correlation analysis on data from Advanced LIGO's second observing run (O2), which we combine with the results of the first observing run (O1). We do not find evidence for a stochastic background, so we place upper limits on the normalized energy density in gravitational waves at the 95% credible level of ωGW<6.0×10-8 for a frequency-independent (flat) background and ωGW<4.8×10-8 at 25 Hz for a background of compact binary coalescences. The upper limit improves over the O1 result by a factor of 2.8. Additionally, we place upper limits on the energy density in an isotropic background of scalar- and vector-polarized gravitational waves, and we discuss the implication of these results for models of compact binaries and cosmic string backgrounds. Finally, we present a conservative estimate of the correlated broadband noise due to the magnetic Schumann resonances in O2, based on magnetometer measurements at both the LIGO Hanford and LIGO Livingston observatories. We find that correlated noise is well below the O2 sensitivity.

AB - The stochastic gravitational-wave background is a superposition of sources that are either too weak or too numerous to detect individually. In this study, we present the results from a cross-correlation analysis on data from Advanced LIGO's second observing run (O2), which we combine with the results of the first observing run (O1). We do not find evidence for a stochastic background, so we place upper limits on the normalized energy density in gravitational waves at the 95% credible level of ωGW<6.0×10-8 for a frequency-independent (flat) background and ωGW<4.8×10-8 at 25 Hz for a background of compact binary coalescences. The upper limit improves over the O1 result by a factor of 2.8. Additionally, we place upper limits on the energy density in an isotropic background of scalar- and vector-polarized gravitational waves, and we discuss the implication of these results for models of compact binaries and cosmic string backgrounds. Finally, we present a conservative estimate of the correlated broadband noise due to the magnetic Schumann resonances in O2, based on magnetometer measurements at both the LIGO Hanford and LIGO Livingston observatories. We find that correlated noise is well below the O2 sensitivity.

UR - http://www.scopus.com/inward/record.url?scp=85072995802&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85072995802&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.100.061101

DO - 10.1103/PhysRevD.100.061101

M3 - Article

AN - SCOPUS:85072995802

VL - 100

SP - 1

EP - 16

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 6

M1 - 061101

ER -