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\textit{Euclid}: From Galaxies to Gravitational Waves -- Forecasting Stochastic Gravitational Wave Background Anisotropies and Their Cross-Correlation

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Main Authors: Yang, K. Z., Cusin, G., Mandic, V., Scarlata, C., Suresh, J., Altieri, B., Auricchio, N., Baccigalupi, C., Baldi, M., Bardelli, S., Biviano, A., Branchini, E., Brescia, M., Camera, S., Cañas-Herrera, G., Capobianco, V., Carbone, C., Carretero, J., Casas, S., Castellano, M., Castignani, G., Cavuoti, S., Chambers, K. C., Cimatti, A., Colodro-Conde, C., Congedo, G., Conversi, L., Copin, Y., Costille, A., Courbin, F., Courtois, H. M., Degaudenzi, H., De Lucia, G., Dole, H., Dubath, F., Dupac, X., Dusini, S., Escoffier, S., Farina, M., Farinelli, R., Faustini, F., Ferriol, S., Finelli, F., Fosalba, P., Fourmanoit, N., Frailis, M., Franceschi, E., Fumana, M., Galeotta, S., George, K., Gillis, B., Giocoli, C., Gómez-Alvarez, P., Gracia-Carpio, J., Grazian, A., Grupp, F., Haugan, S. V. H., Holmes, W., Hormuth, F., Hornstrup, A., Jahnke, K., Jhabvala, M., Joachimi, B., Keihänen, E., Kermiche, S., Kiessling, A., Kubik, B., Kunz, M., Kurki-Suonio, H., Brun, A. M. C. Le, Ligori, S., Lilje, P. B., Lindholm, V., Lloro, I., Mainetti, G., Maino, D., Mansutti, O., Marcin, S., Marggraf, O., Martinelli, M., Martinet, N., Marulli, F., Medinaceli, E., Mei, S., Mellier, Y., Meneghetti, M., Merlin, E., Meylan, G., Mora, A., Moresco, M., Moscardini, L., Neissner, C., Niemi, S. -M., Padilla, C., Paltani, S., Pasian, F., Pedersen, K., Pettorino, V., Pires, S., Polenta, G., Poncet, M., Popa, L. A., Pozzetti, L., Raison, F., Renzi, A., Rhodes, J., Riccio, G., Romelli, E., Roncarelli, M., Saglia, R., Sakr, Z., Sapone, D., Sartoris, B., Schirmer, M., Schneider, P., Secroun, A., Sefusatti, E., Seidel, G., Serrano, S., Sirignano, C., Sirri, G., Stanco, L., Steinwagner, J., Tallada-Crespí, P., Taylor, A. N., Tereno, I., Tessore, N., Toft, S., Toledo-Moreo, R., Torradeflot, F., Tutusaus, I., Valenziano, L., Valiviita, J., Vassallo, T., Veropalumbo, A., Weller, J., Zamorani, G., Zerbi, F. M., Zucca, E., Castro, T., García-Bellido, J., Scottez, V., Viel, M., Monaco, P.
Format: Preprint
Published: 2025
Subjects:
General Relativity and Quantum Cosmology
Cosmology and Nongalactic Astrophysics
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_version_ 1866911266140848128
author Yang, K. Z.
Cusin, G.
Mandic, V.
Scarlata, C.
Suresh, J.
Altieri, B.
Auricchio, N.
Baccigalupi, C.
Baldi, M.
Bardelli, S.
Biviano, A.
Branchini, E.
Brescia, M.
Camera, S.
Cañas-Herrera, G.
Capobianco, V.
Carbone, C.
Carretero, J.
Casas, S.
Castellano, M.
Castignani, G.
Cavuoti, S.
Chambers, K. C.
Cimatti, A.
Colodro-Conde, C.
Congedo, G.
Conversi, L.
Copin, Y.
Costille, A.
Courbin, F.
Courtois, H. M.
Degaudenzi, H.
De Lucia, G.
Dole, H.
Dubath, F.
Dupac, X.
Dusini, S.
Escoffier, S.
Farina, M.
Farinelli, R.
Faustini, F.
Ferriol, S.
Finelli, F.
Fosalba, P.
Fourmanoit, N.
Frailis, M.
Franceschi, E.
Fumana, M.
Galeotta, S.
George, K.
Gillis, B.
Giocoli, C.
Gómez-Alvarez, P.
Gracia-Carpio, J.
Grazian, A.
Grupp, F.
Haugan, S. V. H.
Holmes, W.
Hormuth, F.
Hornstrup, A.
Jahnke, K.
Jhabvala, M.
Joachimi, B.
Keihänen, E.
Kermiche, S.
Kiessling, A.
Kubik, B.
Kunz, M.
Kurki-Suonio, H.
Brun, A. M. C. Le
Ligori, S.
Lilje, P. B.
Lindholm, V.
Lloro, I.
Mainetti, G.
Maino, D.
Mansutti, O.
Marcin, S.
Marggraf, O.
Martinelli, M.
Martinet, N.
Marulli, F.
Medinaceli, E.
Mei, S.
Mellier, Y.
Meneghetti, M.
Merlin, E.
Meylan, G.
Mora, A.
Moresco, M.
Moscardini, L.
Neissner, C.
Niemi, S. -M.
Padilla, C.
Paltani, S.
Pasian, F.
Pedersen, K.
Pettorino, V.
Pires, S.
Polenta, G.
Poncet, M.
Popa, L. A.
Pozzetti, L.
Raison, F.
Renzi, A.
Rhodes, J.
Riccio, G.
Romelli, E.
Roncarelli, M.
Saglia, R.
Sakr, Z.
Sapone, D.
Sartoris, B.
Schirmer, M.
Schneider, P.
Secroun, A.
Sefusatti, E.
Seidel, G.
Serrano, S.
Sirignano, C.
Sirri, G.
Stanco, L.
Steinwagner, J.
Tallada-Crespí, P.
Taylor, A. N.
Tereno, I.
Tessore, N.
Toft, S.
Toledo-Moreo, R.
Torradeflot, F.
Tutusaus, I.
Valenziano, L.
Valiviita, J.
Vassallo, T.
Veropalumbo, A.
Weller, J.
Zamorani, G.
Zerbi, F. M.
Zucca, E.
Castro, T.
García-Bellido, J.
Scottez, V.
Viel, M.
Monaco, P.
author_facet Yang, K. Z.
Cusin, G.
Mandic, V.
Scarlata, C.
Suresh, J.
Altieri, B.
Auricchio, N.
Baccigalupi, C.
Baldi, M.
Bardelli, S.
Biviano, A.
Branchini, E.
Brescia, M.
Camera, S.
Cañas-Herrera, G.
Capobianco, V.
Carbone, C.
Carretero, J.
Casas, S.
Castellano, M.
Castignani, G.
Cavuoti, S.
Chambers, K. C.
Cimatti, A.
Colodro-Conde, C.
Congedo, G.
Conversi, L.
Copin, Y.
Costille, A.
Courbin, F.
Courtois, H. M.
Degaudenzi, H.
De Lucia, G.
Dole, H.
Dubath, F.
Dupac, X.
Dusini, S.
Escoffier, S.
Farina, M.
Farinelli, R.
Faustini, F.
Ferriol, S.
Finelli, F.
Fosalba, P.
Fourmanoit, N.
Frailis, M.
Franceschi, E.
Fumana, M.
Galeotta, S.
George, K.
Gillis, B.
Giocoli, C.
Gómez-Alvarez, P.
Gracia-Carpio, J.
Grazian, A.
Grupp, F.
Haugan, S. V. H.
Holmes, W.
Hormuth, F.
Hornstrup, A.
Jahnke, K.
Jhabvala, M.
Joachimi, B.
Keihänen, E.
Kermiche, S.
Kiessling, A.
Kubik, B.
Kunz, M.
Kurki-Suonio, H.
Brun, A. M. C. Le
Ligori, S.
Lilje, P. B.
Lindholm, V.
Lloro, I.
Mainetti, G.
Maino, D.
Mansutti, O.
Marcin, S.
Marggraf, O.
Martinelli, M.
Martinet, N.
Marulli, F.
Medinaceli, E.
Mei, S.
Mellier, Y.
Meneghetti, M.
Merlin, E.
Meylan, G.
Mora, A.
Moresco, M.
Moscardini, L.
Neissner, C.
Niemi, S. -M.
Padilla, C.
Paltani, S.
Pasian, F.
Pedersen, K.
Pettorino, V.
Pires, S.
Polenta, G.
Poncet, M.
Popa, L. A.
Pozzetti, L.
Raison, F.
Renzi, A.
Rhodes, J.
Riccio, G.
Romelli, E.
Roncarelli, M.
Saglia, R.
Sakr, Z.
Sapone, D.
Sartoris, B.
Schirmer, M.
Schneider, P.
Secroun, A.
Sefusatti, E.
Seidel, G.
Serrano, S.
Sirignano, C.
Sirri, G.
Stanco, L.
Steinwagner, J.
Tallada-Crespí, P.
Taylor, A. N.
Tereno, I.
Tessore, N.
Toft, S.
Toledo-Moreo, R.
Torradeflot, F.
Tutusaus, I.
Valenziano, L.
Valiviita, J.
Vassallo, T.
Veropalumbo, A.
Weller, J.
Zamorani, G.
Zerbi, F. M.
Zucca, E.
Castro, T.
García-Bellido, J.
Scottez, V.
Viel, M.
Monaco, P.
contents We estimate the amplitude and spatial anisotropy in the stochastic gravitational wave background (SGWB) energy density due to compact binary coalescence (CBC) events: binary black holes (BBH), binary neutron stars (BNS), and black hole-neutron star (BHNS) mergers. Our starting point is the Flagship Simulation Galaxy Catalogue developed by the Euclid Consortium. For each galaxy in the Catalogue, we use the simulated mass and starformation to constrain the galaxy's star-formation history, and predict its contribution to the gravitational-wave energy density through CBC mergers. Combining such contributions from all galaxies in the Catalogue results in a prediction for the frequency spectrum and spatial anisotropy of the CBC SGWB. We also compare this prediction to semi-analytical models of SGWB generated by compact binaries. We identify a set of effective parameters that capture the key features of these models, and we apply a Bayesian framework to infer these parameters assuming an ideal scenario of cosmic variance-limited search. This represents the first step toward developing a comprehensive framework that will eventually enable the correlation of SGWB anisotropy and \textit{Euclid} galaxy data, potentially allowing us to extract valuable astrophysical information from this new observable.
format Preprint
id arxiv_https___arxiv_org_abs_2511_11509
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle \textit{Euclid}: From Galaxies to Gravitational Waves -- Forecasting Stochastic Gravitational Wave Background Anisotropies and Their Cross-Correlation
Yang, K. Z.
Cusin, G.
Mandic, V.
Scarlata, C.
Suresh, J.
Altieri, B.
Auricchio, N.
Baccigalupi, C.
Baldi, M.
Bardelli, S.
Biviano, A.
Branchini, E.
Brescia, M.
Camera, S.
Cañas-Herrera, G.
Capobianco, V.
Carbone, C.
Carretero, J.
Casas, S.
Castellano, M.
Castignani, G.
Cavuoti, S.
Chambers, K. C.
Cimatti, A.
Colodro-Conde, C.
Congedo, G.
Conversi, L.
Copin, Y.
Costille, A.
Courbin, F.
Courtois, H. M.
Degaudenzi, H.
De Lucia, G.
Dole, H.
Dubath, F.
Dupac, X.
Dusini, S.
Escoffier, S.
Farina, M.
Farinelli, R.
Faustini, F.
Ferriol, S.
Finelli, F.
Fosalba, P.
Fourmanoit, N.
Frailis, M.
Franceschi, E.
Fumana, M.
Galeotta, S.
George, K.
Gillis, B.
Giocoli, C.
Gómez-Alvarez, P.
Gracia-Carpio, J.
Grazian, A.
Grupp, F.
Haugan, S. V. H.
Holmes, W.
Hormuth, F.
Hornstrup, A.
Jahnke, K.
Jhabvala, M.
Joachimi, B.
Keihänen, E.
Kermiche, S.
Kiessling, A.
Kubik, B.
Kunz, M.
Kurki-Suonio, H.
Brun, A. M. C. Le
Ligori, S.
Lilje, P. B.
Lindholm, V.
Lloro, I.
Mainetti, G.
Maino, D.
Mansutti, O.
Marcin, S.
Marggraf, O.
Martinelli, M.
Martinet, N.
Marulli, F.
Medinaceli, E.
Mei, S.
Mellier, Y.
Meneghetti, M.
Merlin, E.
Meylan, G.
Mora, A.
Moresco, M.
Moscardini, L.
Neissner, C.
Niemi, S. -M.
Padilla, C.
Paltani, S.
Pasian, F.
Pedersen, K.
Pettorino, V.
Pires, S.
Polenta, G.
Poncet, M.
Popa, L. A.
Pozzetti, L.
Raison, F.
Renzi, A.
Rhodes, J.
Riccio, G.
Romelli, E.
Roncarelli, M.
Saglia, R.
Sakr, Z.
Sapone, D.
Sartoris, B.
Schirmer, M.
Schneider, P.
Secroun, A.
Sefusatti, E.
Seidel, G.
Serrano, S.
Sirignano, C.
Sirri, G.
Stanco, L.
Steinwagner, J.
Tallada-Crespí, P.
Taylor, A. N.
Tereno, I.
Tessore, N.
Toft, S.
Toledo-Moreo, R.
Torradeflot, F.
Tutusaus, I.
Valenziano, L.
Valiviita, J.
Vassallo, T.
Veropalumbo, A.
Weller, J.
Zamorani, G.
Zerbi, F. M.
Zucca, E.
Castro, T.
García-Bellido, J.
Scottez, V.
Viel, M.
Monaco, P.
General Relativity and Quantum Cosmology
Cosmology and Nongalactic Astrophysics
We estimate the amplitude and spatial anisotropy in the stochastic gravitational wave background (SGWB) energy density due to compact binary coalescence (CBC) events: binary black holes (BBH), binary neutron stars (BNS), and black hole-neutron star (BHNS) mergers. Our starting point is the Flagship Simulation Galaxy Catalogue developed by the Euclid Consortium. For each galaxy in the Catalogue, we use the simulated mass and starformation to constrain the galaxy's star-formation history, and predict its contribution to the gravitational-wave energy density through CBC mergers. Combining such contributions from all galaxies in the Catalogue results in a prediction for the frequency spectrum and spatial anisotropy of the CBC SGWB. We also compare this prediction to semi-analytical models of SGWB generated by compact binaries. We identify a set of effective parameters that capture the key features of these models, and we apply a Bayesian framework to infer these parameters assuming an ideal scenario of cosmic variance-limited search. This represents the first step toward developing a comprehensive framework that will eventually enable the correlation of SGWB anisotropy and \textit{Euclid} galaxy data, potentially allowing us to extract valuable astrophysical information from this new observable.
title \textit{Euclid}: From Galaxies to Gravitational Waves -- Forecasting Stochastic Gravitational Wave Background Anisotropies and Their Cross-Correlation
topic General Relativity and Quantum Cosmology
Cosmology and Nongalactic Astrophysics
url https://arxiv.org/abs/2511.11509

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