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Autores principales: Banday, A. J., Gimeno-Amo, C., Diego-Palazuelos, P., de la Hoz, E., Gruppuso, A., Raffuzzi, N., Martínez-González, E., Vielva, P., Barreiro, R. B., Bortolami, M., Chiocchetta, C., Galloni, G., Scott, D., Sullivan, R. M., Adak, D., Allys, E., Anand, A., Aumont, J., Baccigalupi, C., Ballardini, M., Bartolo, N., Basak, S., Bersanelli, M., Besnard, A., Blinov, D., Bouchet, F., Brinckmann, T., Cacciotti, F., Calabrese, E., Campeti, P., Carones, A., Casas, F. J., Cheung, K., Citran, M., Clermont, L., Columbro, F., Coppolecchia, A., de Bernardis, P., De Lucia, M., Della Torre, S., Di Giorgi, E., Eriksen, H. K., Finelli, F., Franceschet, C., Fuskeland, U., Galloway, M., Gervasi, M., Génova-Santos, R. T., Ghigna, T., Giardiello, S., Hazumi, M., Hergt, L. T., Hivon, E., Ichiki, K., Ishino, H., Jost, B., Kohri, K., Lamagna, L., Lattanzi, M., Leloup, C., Levrier, F., Lonappan, A. I., López-Caniego, M., Luzzi, G., Macias-Perez, J., Maranchery, V., Masi, S., Matarrese, S., Matsumura, T., Micheli, S., Migliaccio, M., Monelli, M., Montier, L., Morgante, G., Najafi, M., Namikawa, T., Novelli, A., Obata, I., Occhiuzzi, A., Paiella, A., Paoletti, D., Pascual-Cisneros, G., Piacentini, F., Piccirilli, G., Polenta, G., Porcelli, L., Remazeilles, M., Rizzieri, A., Rubiño-Martín, J. A., Ruiz-Granda, M., Sakurai, Y., Sanghavi, J., Shiraishi, M., Signorelli, G., Takase, Y., Terenzi, L., Tomasi, M., Tristram, M., Vacher, L., van Tent, B., Wehus, I. K., Weymann-Despres, G., Wollack, E. J., Zhou, Y.
Formato: Preprint
Publicado: 2025
Materias:
Cosmology and Nongalactic Astrophysics
Acceso en línea:https://arxiv.org/abs/2508.16451
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author Banday, A. J.
Gimeno-Amo, C.
Diego-Palazuelos, P.
de la Hoz, E.
Gruppuso, A.
Raffuzzi, N.
Martínez-González, E.
Vielva, P.
Barreiro, R. B.
Bortolami, M.
Chiocchetta, C.
Galloni, G.
Scott, D.
Sullivan, R. M.
Adak, D.
Allys, E.
Anand, A.
Aumont, J.
Baccigalupi, C.
Ballardini, M.
Bartolo, N.
Basak, S.
Bersanelli, M.
Besnard, A.
Blinov, D.
Bouchet, F.
Brinckmann, T.
Cacciotti, F.
Calabrese, E.
Campeti, P.
Carones, A.
Casas, F. J.
Cheung, K.
Citran, M.
Clermont, L.
Columbro, F.
Coppolecchia, A.
de Bernardis, P.
De Lucia, M.
Della Torre, S.
Di Giorgi, E.
Eriksen, H. K.
Finelli, F.
Franceschet, C.
Fuskeland, U.
Galloway, M.
Gervasi, M.
Génova-Santos, R. T.
Ghigna, T.
Giardiello, S.
Hazumi, M.
Hergt, L. T.
Hivon, E.
Ichiki, K.
Ishino, H.
Jost, B.
Kohri, K.
Lamagna, L.
Lattanzi, M.
Leloup, C.
Levrier, F.
Lonappan, A. I.
López-Caniego, M.
Luzzi, G.
Macias-Perez, J.
Maranchery, V.
Masi, S.
Matarrese, S.
Matsumura, T.
Micheli, S.
Migliaccio, M.
Monelli, M.
Montier, L.
Morgante, G.
Najafi, M.
Namikawa, T.
Novelli, A.
Obata, I.
Occhiuzzi, A.
Paiella, A.
Paoletti, D.
Pascual-Cisneros, G.
Piacentini, F.
Piccirilli, G.
Polenta, G.
Porcelli, L.
Remazeilles, M.
Rizzieri, A.
Rubiño-Martín, J. A.
Ruiz-Granda, M.
Sakurai, Y.
Sanghavi, J.
Shiraishi, M.
Signorelli, G.
Takase, Y.
Terenzi, L.
Tomasi, M.
Tristram, M.
Vacher, L.
van Tent, B.
Wehus, I. K.
Weymann-Despres, G.
Wollack, E. J.
Zhou, Y.
author_facet Banday, A. J.
Gimeno-Amo, C.
Diego-Palazuelos, P.
de la Hoz, E.
Gruppuso, A.
Raffuzzi, N.
Martínez-González, E.
Vielva, P.
Barreiro, R. B.
Bortolami, M.
Chiocchetta, C.
Galloni, G.
Scott, D.
Sullivan, R. M.
Adak, D.
Allys, E.
Anand, A.
Aumont, J.
Baccigalupi, C.
Ballardini, M.
Bartolo, N.
Basak, S.
Bersanelli, M.
Besnard, A.
Blinov, D.
Bouchet, F.
Brinckmann, T.
Cacciotti, F.
Calabrese, E.
Campeti, P.
Carones, A.
Casas, F. J.
Cheung, K.
Citran, M.
Clermont, L.
Columbro, F.
Coppolecchia, A.
de Bernardis, P.
De Lucia, M.
Della Torre, S.
Di Giorgi, E.
Eriksen, H. K.
Finelli, F.
Franceschet, C.
Fuskeland, U.
Galloway, M.
Gervasi, M.
Génova-Santos, R. T.
Ghigna, T.
Giardiello, S.
Hazumi, M.
Hergt, L. T.
Hivon, E.
Ichiki, K.
Ishino, H.
Jost, B.
Kohri, K.
Lamagna, L.
Lattanzi, M.
Leloup, C.
Levrier, F.
Lonappan, A. I.
López-Caniego, M.
Luzzi, G.
Macias-Perez, J.
Maranchery, V.
Masi, S.
Matarrese, S.
Matsumura, T.
Micheli, S.
Migliaccio, M.
Monelli, M.
Montier, L.
Morgante, G.
Najafi, M.
Namikawa, T.
Novelli, A.
Obata, I.
Occhiuzzi, A.
Paiella, A.
Paoletti, D.
Pascual-Cisneros, G.
Piacentini, F.
Piccirilli, G.
Polenta, G.
Porcelli, L.
Remazeilles, M.
Rizzieri, A.
Rubiño-Martín, J. A.
Ruiz-Granda, M.
Sakurai, Y.
Sanghavi, J.
Shiraishi, M.
Signorelli, G.
Takase, Y.
Terenzi, L.
Tomasi, M.
Tristram, M.
Vacher, L.
van Tent, B.
Wehus, I. K.
Weymann-Despres, G.
Wollack, E. J.
Zhou, Y.
contents Various so-called anomalies have been found in both the WMAP and Planck cosmic microwave background (CMB) temperature data that exert a mild tension against the highly successful best-fit 6 parameter cosmological model, potentially providing hints of new physics to be explored. That these are real features on the sky is uncontested. However, given their modest significance, whether they are indicative of true departures from the standard cosmology or simply statistical excursions, due to a mildly unusual configuration of temperature anisotropies on the sky which we refer to as the "fluke hypothesis", cannot be addressed further without new information. No theoretical model of primordial perturbations has to date been constructed that can explain all of the temperature anomalies. Therefore, we focus in this paper on testing the fluke hypothesis, based on the partial correlation between the temperature and $E$-mode CMB polarisation signal. In particular, we compare the properties of specific statistics in polarisation, built from unconstrained realisations of the $Λ$CDM cosmological model as might be observed by the LiteBIRD satellite, with those determined from constrained simulations, where the part of the $E$-mode anisotropy correlated with temperature is constrained by observations of the latter. Specifically, we use inpainted Planck 2018 SMICA temperature data to constrain the $E$-mode realisations. Subsequent analysis makes use of masks defined to minimise the impact of the inpainting procedure on the $E$-mode map statistics. We find that statistical assessments of the $E$-mode data alone do not provide any evidence for or against the fluke hypothesis. However, tests based on cross-statistical measures determined from temperature and $E$ modes can allow this hypothesis to be rejected with a moderate level of probability.
format Preprint
id arxiv_https___arxiv_org_abs_2508_16451
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle LiteBIRD Science Goals and Forecasts. $E$-mode Anomalies
Banday, A. J.
Gimeno-Amo, C.
Diego-Palazuelos, P.
de la Hoz, E.
Gruppuso, A.
Raffuzzi, N.
Martínez-González, E.
Vielva, P.
Barreiro, R. B.
Bortolami, M.
Chiocchetta, C.
Galloni, G.
Scott, D.
Sullivan, R. M.
Adak, D.
Allys, E.
Anand, A.
Aumont, J.
Baccigalupi, C.
Ballardini, M.
Bartolo, N.
Basak, S.
Bersanelli, M.
Besnard, A.
Blinov, D.
Bouchet, F.
Brinckmann, T.
Cacciotti, F.
Calabrese, E.
Campeti, P.
Carones, A.
Casas, F. J.
Cheung, K.
Citran, M.
Clermont, L.
Columbro, F.
Coppolecchia, A.
de Bernardis, P.
De Lucia, M.
Della Torre, S.
Di Giorgi, E.
Eriksen, H. K.
Finelli, F.
Franceschet, C.
Fuskeland, U.
Galloway, M.
Gervasi, M.
Génova-Santos, R. T.
Ghigna, T.
Giardiello, S.
Hazumi, M.
Hergt, L. T.
Hivon, E.
Ichiki, K.
Ishino, H.
Jost, B.
Kohri, K.
Lamagna, L.
Lattanzi, M.
Leloup, C.
Levrier, F.
Lonappan, A. I.
López-Caniego, M.
Luzzi, G.
Macias-Perez, J.
Maranchery, V.
Masi, S.
Matarrese, S.
Matsumura, T.
Micheli, S.
Migliaccio, M.
Monelli, M.
Montier, L.
Morgante, G.
Najafi, M.
Namikawa, T.
Novelli, A.
Obata, I.
Occhiuzzi, A.
Paiella, A.
Paoletti, D.
Pascual-Cisneros, G.
Piacentini, F.
Piccirilli, G.
Polenta, G.
Porcelli, L.
Remazeilles, M.
Rizzieri, A.
Rubiño-Martín, J. A.
Ruiz-Granda, M.
Sakurai, Y.
Sanghavi, J.
Shiraishi, M.
Signorelli, G.
Takase, Y.
Terenzi, L.
Tomasi, M.
Tristram, M.
Vacher, L.
van Tent, B.
Wehus, I. K.
Weymann-Despres, G.
Wollack, E. J.
Zhou, Y.
Cosmology and Nongalactic Astrophysics
Various so-called anomalies have been found in both the WMAP and Planck cosmic microwave background (CMB) temperature data that exert a mild tension against the highly successful best-fit 6 parameter cosmological model, potentially providing hints of new physics to be explored. That these are real features on the sky is uncontested. However, given their modest significance, whether they are indicative of true departures from the standard cosmology or simply statistical excursions, due to a mildly unusual configuration of temperature anisotropies on the sky which we refer to as the "fluke hypothesis", cannot be addressed further without new information. No theoretical model of primordial perturbations has to date been constructed that can explain all of the temperature anomalies. Therefore, we focus in this paper on testing the fluke hypothesis, based on the partial correlation between the temperature and $E$-mode CMB polarisation signal. In particular, we compare the properties of specific statistics in polarisation, built from unconstrained realisations of the $Λ$CDM cosmological model as might be observed by the LiteBIRD satellite, with those determined from constrained simulations, where the part of the $E$-mode anisotropy correlated with temperature is constrained by observations of the latter. Specifically, we use inpainted Planck 2018 SMICA temperature data to constrain the $E$-mode realisations. Subsequent analysis makes use of masks defined to minimise the impact of the inpainting procedure on the $E$-mode map statistics. We find that statistical assessments of the $E$-mode data alone do not provide any evidence for or against the fluke hypothesis. However, tests based on cross-statistical measures determined from temperature and $E$ modes can allow this hypothesis to be rejected with a moderate level of probability.
title LiteBIRD Science Goals and Forecasts. $E$-mode Anomalies
topic Cosmology and Nongalactic Astrophysics
url https://arxiv.org/abs/2508.16451

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