May
2025
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2025A&A...697A...7M
Authors
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Martín, E. L.
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Žerjal, M.
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Bouy, H.
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Martin-Gonzalez, D.
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Muñoz Torres, S.
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Barrado, D.
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Olivares, J.
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Pérez-Garrido, A.
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Mas-Buitrago, P.
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Cruz, P.
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Solano, E.
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Zapatero Osorio, M. R.
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Lodieu, N.
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Béjar, V. J. S.
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Zhang, J. -Y.
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del Burgo, C.
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Huélamo, N.
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Laureijs, R.
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Mora, A.
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Saifollahi, T.
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Cuillandre, J. -C.
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Schirmer, M.
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Tata, R.
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Points, S.
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Phan-Bao, N.
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Goldman, B.
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Casewell, S. L.
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Reylé, C.
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Smart, R. L.
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Dominguez-Tagle, C.
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Escobar, A.
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Sedighi, N.
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Tsilia, S.
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Vitas, N.
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Ayadi, A.
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Aghanim, N.
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Altieri, B.
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Andreon, S.
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Auricchio, N.
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Baldi, M.
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Balestra, A.
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Bardelli, S.
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Basset, A.
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Bender, R.
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Bonino, D.
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Branchini, E.
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Brescia, M.
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Brinchmann, J.
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Camera, S.
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Capobianco, V.
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Carbone, C.
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Carretero, J.
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Casas, S.
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Castellano, M.
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Cavuoti, S.
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Cimatti, A.
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Congedo, G.
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Conselice, C. J.
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Conversi, L.
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Copin, Y.
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Corcione, L.
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Courbin, F.
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Courtois, H. M.
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Cropper, M.
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Da Silva, A.
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Degaudenzi, H.
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Di Giorgio, A. M.
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Dinis, J.
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Dubath, F.
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Dupac, X.
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Dusini, S.
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Ealet, A.
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Farina, M.
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Farrens, S.
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Ferriol, S.
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Fosalba, P.
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Frailis, M.
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Franceschi, E.
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Fumana, M.
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Galeotta, S.
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Garilli, B.
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Gillard, W.
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Gillis, B.
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Giocoli, C.
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Gómez-Alvarez, P.
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Grazian, A.
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Grupp, F.
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Guzzo, L.
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Haugan, S. V. H.
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Hoar, J.
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Hoekstra, H.
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Holmes, W.
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Hook, I.
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Hormuth, F.
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Hornstrup, A.
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Hu, D.
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Hudelot, P.
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Jahnke, K.
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Jhabvala, M.
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Keihänen, E.
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Kermiche, S.
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Kiessling, A.
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Kilbinger, M.
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Kitching, T.
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Kohley, R.
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Kubik, B.
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Kümmel, M.
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Kunz, M.
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Kurki-Suonio, H.
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Le Mignant, D.
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Ligori, S.
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Lilje, P. B.
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Lindholm, V.
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Lloro, I.
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Maino, D.
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Maiorano, E.
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Mansutti, O.
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Marggraf, O.
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Martinet, N.
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Marulli, F.
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Massey, R.
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Medinaceli, E.
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Mei, S.
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Melchior, M.
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Mellier, Y.
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Meneghetti, M.
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Meylan, G.
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Mohr, J. J.
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Moresco, M.
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Moscardini, L.
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Niemi, S. -M.
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Padilla, C.
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Paltani, S.
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Pasian, F.
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Pedersen, K.
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Percival, W. J.
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Pettorino, V.
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Pires, S.
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Polenta, G.
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Poncet, M.
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Popa, L. A.
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Pozzetti, L.
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Racca, G. D.
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Raison, F.
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Rebolo, R.
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Renzi, A.
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Rhodes, J.
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Riccio, G.
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Rix, Hans-Walter
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Romelli, E.
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Roncarelli, M.
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Rossetti, E.
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Saglia, R.
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Sapone, D.
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Sartoris, B.
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Sauvage, M.
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Scaramella, R.
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Schneider, P.
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Secroun, A.
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Seidel, G.
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Seiffert, M.
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Serrano, S.
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Sirignano, C.
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Sirri, G.
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Stanco, L.
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Tallada-Crespí, P.
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Taylor, A. N.
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Teplitz, H. I.
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Tereno, I.
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Toledo-Moreo, R.
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Tsyganov, A.
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Tutusaus, I.
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Valenziano, L.
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Vassallo, T.
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Verdoes Kleijn, G.
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Wang, Y.
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Weller, J.
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Williams, O. R.
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Zucca, E.
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Baccigalupi, C.
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Willis, G.
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Simon, P.
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Martín-Fleitas, J.
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Scott, D.
Abstract
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We provide an early assessment of the imaging capabilities of the Euclid space mission to deeply probe nearby star-forming regions and associated very young open clusters, and in particular, to determine to which extent it can shed light into the newborn free- floating planet population. This paper focusses on a low-reddening region observed in just one Euclid pointing. The dust and gas has been cleared out from the region by the hot σ Orionis star. One late-M and six known spectroscopically confirmed L-type ultracool members in the σ Orionis cluster were used as benchmarks to provide a high-purity procedure to select new candidate members with Euclid. The exquisite angular resolution and depth delivered by the Euclid instruments allowed us to focus on bona fide point sources. A cleaned sample of σ Orionis cluster substellar members was produced, and the initial mass function (IMF) was estimated by combining Euclid and Gaia data. Our σ Orionis substellar IMF is consistent with a power-law distribution without a significant steepening at the planetary-mass end. No evidence of a low-mass cutoff is found down to the detection limit of this study at 4 Jupiter masses in the very young σ Orionis open cluster. ★This paper is published on behalf of the Euclid Consortium.
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