Limits on Anisotropy in the Nanohertz Stochastic Gravitational Wave Background

S R Taylor; C M F Mingarelli; J R Gair; A Sesana; G Theureau; S Babak; C G Bassa; P Brem; M Burgay; R N Caballero; D J Champion; I Cognard; G Desvignes; L Guillemot; J W T Hessels; G H Janssen; R Karuppusamy; M Kramer; A Lassus; P Lazarus; L Lentati; K Liu; S Osłowski; D Perrodin; A Petiteau; A Possenti; M B Purver; P A Rosado; S A Sanidas; R Smits; B Stappers; C Tiburzi; R van Haasteren; A Vecchio; J P W Verbiest; EPTA Collaboration

Limits on Anisotropy in the Nanohertz Stochastic Gravitational Wave Background

S R Taylor, C M F Mingarelli, J R Gair, A Sesana, G Theureau, S Babak, C G Bassa, P Brem, M Burgay, R N Caballero, D J Champion, I Cognard, G Desvignes, L Guillemot, J W T Hessels, G H Janssen, R Karuppusamy, M Kramer, A Lassus, P LazarusL Lentati, K Liu, S Osłowski, D Perrodin, A Petiteau, A Possenti, M B Purver, P A Rosado, S A Sanidas, R Smits, B Stappers, C Tiburzi, R van Haasteren, A Vecchio, J P W Verbiest, EPTA Collaboration

Research output: Contribution to journal › Article › peer-review

Abstract

The paucity of observed supermassive black hole binaries (SMBHBs) may imply that the gravitational wave background (GWB) from this population is anisotropic, rendering existing analyses suboptimal. We present the first constraints on the angular distribution of a nanohertz stochastic GWB from circular, inspiral-driven SMBHBs using the 2015 European Pulsar Timing Array data. Our analysis of the GWB in the ˜2 - 90 nHz band shows consistency with isotropy, with the strain amplitude in l >0 spherical harmonic multipoles ≲40 % of the monopole value. We expect that these more general techniques will become standard tools to probe the angular distribution of source populations.

Original language	English
Journal	Physical Review Letters
Volume	115
Publication status	Published - 2015

Keywords

Gravitational wave detectors and experiments
Gravitational waves: theory
Pulsars
Galaxy mergers collisions and tidal interactions

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http://adsabs.harvard.edu/abs/2015PhRvL.115d1101T

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Taylor, S. R., Mingarelli, C. M. F., Gair, J. R., Sesana, A., Theureau, G., Babak, S., Bassa, C. G., Brem, P., Burgay, M., Caballero, R. N., Champion, D. J., Cognard, I., Desvignes, G., Guillemot, L., Hessels, J. W. T., Janssen, G. H., Karuppusamy, R., Kramer, M., Lassus, A., ... Collaboration, EPTA. (2015). Limits on Anisotropy in the Nanohertz Stochastic Gravitational Wave Background. Physical Review Letters, 115. http://adsabs.harvard.edu/abs/2015PhRvL.115d1101T

@article{f619dcaddadd4910b4da70b15284e2d4,

title = "Limits on Anisotropy in the Nanohertz Stochastic Gravitational Wave Background",

abstract = "The paucity of observed supermassive black hole binaries (SMBHBs) may imply that the gravitational wave background (GWB) from this population is anisotropic, rendering existing analyses suboptimal. We present the first constraints on the angular distribution of a nanohertz stochastic GWB from circular, inspiral-driven SMBHBs using the 2015 European Pulsar Timing Array data. Our analysis of the GWB in the ˜2 - 90 nHz band shows consistency with isotropy, with the strain amplitude in l >0 spherical harmonic multipoles ≲40 % of the monopole value. We expect that these more general techniques will become standard tools to probe the angular distribution of source populations.",

keywords = "Gravitational wave detectors and experiments, Gravitational waves: theory, Pulsars, Galaxy mergers collisions and tidal interactions",

author = "Taylor, {S R} and Mingarelli, {C M F} and Gair, {J R} and A Sesana and G Theureau and S Babak and Bassa, {C G} and P Brem and M Burgay and Caballero, {R N} and Champion, {D J} and I Cognard and G Desvignes and L Guillemot and Hessels, {J W T} and Janssen, {G H} and R Karuppusamy and M Kramer and A Lassus and P Lazarus and L Lentati and K Liu and S Os{\l}owski and D Perrodin and A Petiteau and A Possenti and Purver, {M B} and Rosado, {P A} and Sanidas, {S A} and R Smits and B Stappers and C Tiburzi and {van Haasteren}, R and A Vecchio and Verbiest, {J P W} and EPTA Collaboration",

year = "2015",

language = "English",

volume = "115",

journal = "Physical Review Letters",

issn = "1079-7114",

publisher = "American Physical Society",

}

Taylor, SR, Mingarelli, CMF, Gair, JR, Sesana, A, Theureau, G, Babak, S, Bassa, CG, Brem, P, Burgay, M, Caballero, RN, Champion, DJ, Cognard, I, Desvignes, G, Guillemot, L, Hessels, JWT, Janssen, GH, Karuppusamy, R, Kramer, M, Lassus, A, Lazarus, P, Lentati, L, Liu, K, Osłowski, S, Perrodin, D, Petiteau, A, Possenti, A, Purver, MB, Rosado, PA, Sanidas, SA, Smits, R, Stappers, B, Tiburzi, C, van Haasteren, R, Vecchio, A, Verbiest, JPW & Collaboration, EPTA 2015, 'Limits on Anisotropy in the Nanohertz Stochastic Gravitational Wave Background', Physical Review Letters, vol. 115. <http://adsabs.harvard.edu/abs/2015PhRvL.115d1101T>

TY - JOUR

T1 - Limits on Anisotropy in the Nanohertz Stochastic Gravitational Wave Background

AU - Taylor, S R

AU - Mingarelli, C M F

AU - Gair, J R

AU - Sesana, A

AU - Theureau, G

AU - Babak, S

AU - Bassa, C G

AU - Brem, P

AU - Burgay, M

AU - Caballero, R N

AU - Champion, D J

AU - Cognard, I

AU - Desvignes, G

AU - Guillemot, L

AU - Hessels, J W T

AU - Janssen, G H

AU - Karuppusamy, R

AU - Kramer, M

AU - Lassus, A

AU - Lazarus, P

AU - Lentati, L

AU - Liu, K

AU - Osłowski, S

AU - Perrodin, D

AU - Petiteau, A

AU - Possenti, A

AU - Purver, M B

AU - Rosado, P A

AU - Sanidas, S A

AU - Smits, R

AU - Stappers, B

AU - Tiburzi, C

AU - van Haasteren, R

AU - Vecchio, A

AU - Verbiest, J P W

AU - Collaboration, EPTA

PY - 2015

Y1 - 2015

N2 - The paucity of observed supermassive black hole binaries (SMBHBs) may imply that the gravitational wave background (GWB) from this population is anisotropic, rendering existing analyses suboptimal. We present the first constraints on the angular distribution of a nanohertz stochastic GWB from circular, inspiral-driven SMBHBs using the 2015 European Pulsar Timing Array data. Our analysis of the GWB in the ˜2 - 90 nHz band shows consistency with isotropy, with the strain amplitude in l >0 spherical harmonic multipoles ≲40 % of the monopole value. We expect that these more general techniques will become standard tools to probe the angular distribution of source populations.

AB - The paucity of observed supermassive black hole binaries (SMBHBs) may imply that the gravitational wave background (GWB) from this population is anisotropic, rendering existing analyses suboptimal. We present the first constraints on the angular distribution of a nanohertz stochastic GWB from circular, inspiral-driven SMBHBs using the 2015 European Pulsar Timing Array data. Our analysis of the GWB in the ˜2 - 90 nHz band shows consistency with isotropy, with the strain amplitude in l >0 spherical harmonic multipoles ≲40 % of the monopole value. We expect that these more general techniques will become standard tools to probe the angular distribution of source populations.

KW - Gravitational wave detectors and experiments

KW - Gravitational waves: theory

KW - Pulsars

KW - Galaxy mergers collisions and tidal interactions

M3 - Article

SN - 1079-7114

VL - 115

JO - Physical Review Letters

JF - Physical Review Letters

ER -

Limits on Anisotropy in the Nanohertz Stochastic Gravitational Wave Background

Abstract

Keywords

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