Limits on Anisotropy in the Nanohertz Stochastic Gravitational Wave Background

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, et al. (2015)
Physical Review Letters 115(4): 041101.

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Zeitschriftenaufsatz | Veröffentlicht | Englisch
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Abstract / Bemerkung
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.
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Physical Review Letters
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115
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4
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041101
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Taylor S R, Mingarelli C M F, Gair J R, et al. Limits on Anisotropy in the Nanohertz Stochastic Gravitational Wave Background. Physical Review Letters. 2015;115(4):041101.
Taylor, S.  R., Mingarelli, C.  M.  F., Gair, J.  R., Sesana, A., Theureau, G., Babak, S., Bassa, C.  G., et al. (2015). Limits on Anisotropy in the Nanohertz Stochastic Gravitational Wave Background. Physical Review Letters, 115(4), 041101. doi:10.1103/PhysRevLett.115.041101
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., et al. (2015). Limits on Anisotropy in the Nanohertz Stochastic Gravitational Wave Background. Physical Review Letters 115, 041101.
Taylor, S. R., et al., 2015. Limits on Anisotropy in the Nanohertz Stochastic Gravitational Wave Background. Physical Review Letters, 115(4), p 041101.
S. R. Taylor, et al., “Limits on Anisotropy in the Nanohertz Stochastic Gravitational Wave Background”, Physical Review Letters, vol. 115, 2015, pp. 041101.
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., Lazarus, P., Lentati, L., Liu, K., Oslowski, S., Perrodin, D., Petiteau, A., Possenti, A., Purver, M. B., Rosado, P. A., Sanidas, S. A., Smits, R., Stappers, B., Tiburzi, C., van Haasteren, R., Vecchio, A., Verbiest, J.: Limits on Anisotropy in the Nanohertz Stochastic Gravitational Wave Background. Physical Review Letters. 115, 041101 (2015).
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., Lazarus, P., Lentati, L., Liu, K., Oslowski, Stefan, Perrodin, D., Petiteau, A., Possenti, A., Purver, M. B., Rosado, P. A., Sanidas, S. A., Smits, R., Stappers, B., Tiburzi, C., van Haasteren, R., Vecchio, A., and Verbiest, Joris. “Limits on Anisotropy in the Nanohertz Stochastic Gravitational Wave Background”. Physical Review Letters 115.4 (2015): 041101.

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PMID: 28690422

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