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

B. P. Abbott, S. V. Angelova, R. Birney, N. A. Lockerbie, S. Macfoy, S. Reid, LIGO Scientific Collaboration, Virgo Collaboration

Research output: Contribution to journalArticle

7 Citations (Scopus)

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 languageEnglish
Article number061101(R)
Number of pages16
JournalPhysical Review D
Volume100
Issue number6
Early online date4 Sep 2019
DOIs
Publication statusPublished - 15 Sep 2019

Fingerprint

LIGO (observatory)
gravitational waves
flux density
magnetometers
cross correlation
coalescing
strings
scalars
broadband
sensitivity
estimates

Keywords

  • LIGO
  • intermediate mass black hole binaries
  • IMBHBs
  • gravitational waves
  • stochastic gravitational-wave background (SGWB)

Cite this

Abbott, B. P. ; Angelova, S. V. ; Birney, R. ; Lockerbie, N. A. ; Macfoy, S. ; Reid, S. ; LIGO Scientific Collaboration ; Virgo Collaboration. / Search for the isotropic stochastic background using data from Advanced LIGO's second observing run. In: Physical Review D. 2019 ; Vol. 100, No. 6.
@article{34c33ac06f8742be9664b61858e9ea97,
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.",
keywords = "LIGO, intermediate mass black hole binaries, IMBHBs, gravitational waves, stochastic gravitational-wave background (SGWB)",
author = "Abbott, {B. P.} and Angelova, {S. V.} and R. Birney and Lockerbie, {N. A.} and S. Macfoy and S. Reid and {LIGO Scientific Collaboration} and {Virgo Collaboration}",
note = "This research article is multi-authored. Please consult the manuscript for full attribution details.",
year = "2019",
month = "9",
day = "15",
doi = "10.1103/PhysRevD.100.061101",
language = "English",
volume = "100",
journal = "Physical Review D",
issn = "1550-7998",
number = "6",

}

Search for the isotropic stochastic background using data from Advanced LIGO's second observing run. / Abbott, B. P.; Angelova, S. V.; Birney, R.; Lockerbie, N. A.; Macfoy, S.; Reid, S.; LIGO Scientific Collaboration; Virgo Collaboration.

In: Physical Review D, Vol. 100, No. 6, 061101(R), 15.09.2019.

Research output: Contribution to journalArticle

TY - JOUR

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

AU - Abbott, B. P.

AU - Angelova, S. V.

AU - Birney, R.

AU - Lockerbie, N. A.

AU - Macfoy, S.

AU - Reid, S.

AU - LIGO Scientific Collaboration

AU - Virgo Collaboration

N1 - This research article is multi-authored. Please consult the manuscript for full attribution details.

PY - 2019/9/15

Y1 - 2019/9/15

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.

KW - LIGO

KW - intermediate mass black hole binaries

KW - IMBHBs

KW - gravitational waves

KW - stochastic gravitational-wave background (SGWB)

U2 - 10.1103/PhysRevD.100.061101

DO - 10.1103/PhysRevD.100.061101

M3 - Article

VL - 100

JO - Physical Review D

JF - Physical Review D

SN - 1550-7998

IS - 6

M1 - 061101(R)

ER -