Euclid: Quick Data Release (Q1) -- A photometric search for ultracool dwarfs in the Euclid Deep Fields

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Bibliographic Details
Main Authors:	Žerjal, M., Dominguez-Tagle, C., Vitas, N., Sedighi, N., Martín, E. L., Osorio, M. R. Zapatero, Olivares, J., Torres, S. Muñoz, Tsilia, S., Zhang, J. -Y., Barrado, D., Béjar, V. J. S., Bouy, H., Burgasser, A., Cruz, P., Lodieu, N., Buitrago, P. Mas, Phan-Bao, N., Solano, E., Tata, R., Goldman, B., Mohandasan, A., Reylé, C., Smart, R. L., Aghanim, N., Altieri, B., Amara, A., Andreon, S., Auricchio, N., Baccigalupi, C., Baldi, M., Balestra, A., Bardelli, S., Battaglia, P., Biviano, A., Bonchi, A., Branchini, E., Brescia, M., Brinchmann, J., 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., Conselice, C. J., Conversi, L., Copin, Y., Courbin, F., Courtois, H. M., Cropper, M., Cuby, J. -G., Da Silva, A., Degaudenzi, H., De Lucia, G., Dolding, C., Dole, H., Douspis, M., Dubath, F., Dupac, X., Dusini, S., Escoffier, S., Farina, M., Faustini, F., Ferriol, S., Fotopoulou, S., Frailis, M., Franceschi, E., Galeotta, S., George, K., Gillis, B., Giocoli, C., Gómez-Alvarez, P., Gracia-Carpio, J., Granett, B. R., Grazian, A., Grupp, F., Haugan, S. V. H., Hoar, J., Holmes, W., Hormuth, F., Hornstrup, A., Jahnke, K., Jhabvala, M., Keihänen, E., Kermiche, S., Kiessling, A., Kubik, B., Kuijken, K., Kümmel, M., Kunz, M., Kurki-Suonio, H., Boulc'h, Q. Le, Brun, A. M. C. Le, Ligori, S., Lilje, P. B., Lindholm, V., Lloro, I., Mainetti, G., Maino, D., Maiorano, E., Mansutti, O., Marggraf, O., Martinelli, M., Martinet, N., Marulli, F., Massey, R., Medinaceli, E., Mei, S., Mellier, Y., Meneghetti, M., Merlin, E., Meylan, G., Mora, A., Moresco, M., Moscardini, L., Nakajima, R., Neissner, C., Niemi, S. -M., Padilla, C., Paltani, S., Pasian, F., Pedersen, K., Percival, W. J., Pettorino, V., Pires, S., Polenta, G., Poncet, M., Popa, L. A., Pozzetti, L., Raison, F., Rebolo, R., Renzi, A., Rhodes, J., Riccio, G., Romelli, E., Roncarelli, M., Saglia, R., Sakr, Z., Sapone, D., Sartoris, B., Schewtschenko, J. A., Schirmer, M., Schneider, P., Secroun, A., Seidel, G., Seiffert, M., Serrano, S., Simon, P., Sirignano, C., Sirri, G., Stanco, L., Steinwagner, J., Tallada-Crespí, P., Taylor, A. N., Tereno, I., Toft, S., Toledo-Moreo, R., Torradeflot, F., Tsyganov, A., Tutusaus, I., Valenziano, L., Valiviita, J., Vassallo, T., Kleijn, G. Verdoes, Veropalumbo, A., Wang, Y., Weller, J., Zacchei, A., Zamorani, G., Zerbi, F. M., Zucca, E., Martín-Fleitas, J., Scottez, V.
Format:	Preprint
Published:	2025
Subjects:	Solar and Stellar Astrophysics Earth and Planetary Astrophysics Astrophysics of Galaxies Instrumentation and Methods for Astrophysics
Online Access:	Acceder al recurso
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author	Žerjal, M. Dominguez-Tagle, C. Vitas, N. Sedighi, N. Martín, E. L. Osorio, M. R. Zapatero Olivares, J. Torres, S. Muñoz Tsilia, S. Zhang, J. -Y. Barrado, D. Béjar, V. J. S. Bouy, H. Burgasser, A. Cruz, P. Lodieu, N. Buitrago, P. Mas Phan-Bao, N. Solano, E. Tata, R. Goldman, B. Mohandasan, A. Reylé, C. Smart, R. L. Aghanim, N. Altieri, B. Amara, A. Andreon, S. Auricchio, N. Baccigalupi, C. Baldi, M. Balestra, A. Bardelli, S. Battaglia, P. Biviano, A. Bonchi, A. Branchini, E. Brescia, M. Brinchmann, J. 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. Conselice, C. J. Conversi, L. Copin, Y. Courbin, F. Courtois, H. M. Cropper, M. Cuby, J. -G. Da Silva, A. Degaudenzi, H. De Lucia, G. Dolding, C. Dole, H. Douspis, M. Dubath, F. Dupac, X. Dusini, S. Escoffier, S. Farina, M. Faustini, F. Ferriol, S. Fotopoulou, S. Frailis, M. Franceschi, E. Galeotta, S. George, K. Gillis, B. Giocoli, C. Gómez-Alvarez, P. Gracia-Carpio, J. Granett, B. R. Grazian, A. Grupp, F. Haugan, S. V. H. Hoar, J. Holmes, W. Hormuth, F. Hornstrup, A. Jahnke, K. Jhabvala, M. Keihänen, E. Kermiche, S. Kiessling, A. Kubik, B. Kuijken, K. Kümmel, M. Kunz, M. Kurki-Suonio, H. Boulc'h, Q. Le Brun, A. M. C. Le Ligori, S. Lilje, P. B. Lindholm, V. Lloro, I. Mainetti, G. Maino, D. Maiorano, E. Mansutti, O. Marggraf, O. Martinelli, M. Martinet, N. Marulli, F. Massey, R. Medinaceli, E. Mei, S. Mellier, Y. Meneghetti, M. Merlin, E. Meylan, G. Mora, A. Moresco, M. Moscardini, L. Nakajima, R. Neissner, C. Niemi, S. -M. Padilla, C. Paltani, S. Pasian, F. Pedersen, K. Percival, W. J. Pettorino, V. Pires, S. Polenta, G. Poncet, M. Popa, L. A. Pozzetti, L. Raison, F. Rebolo, R. Renzi, A. Rhodes, J. Riccio, G. Romelli, E. Roncarelli, M. Saglia, R. Sakr, Z. Sapone, D. Sartoris, B. Schewtschenko, J. A. Schirmer, M. Schneider, P. Secroun, A. Seidel, G. Seiffert, M. Serrano, S. Simon, P. Sirignano, C. Sirri, G. Stanco, L. Steinwagner, J. Tallada-Crespí, P. Taylor, A. N. Tereno, I. Toft, S. Toledo-Moreo, R. Torradeflot, F. Tsyganov, A. Tutusaus, I. Valenziano, L. Valiviita, J. Vassallo, T. Kleijn, G. Verdoes Veropalumbo, A. Wang, Y. Weller, J. Zacchei, A. Zamorani, G. Zerbi, F. M. Zucca, E. Martín-Fleitas, J. Scottez, V.
author_facet	Žerjal, M. Dominguez-Tagle, C. Vitas, N. Sedighi, N. Martín, E. L. Osorio, M. R. Zapatero Olivares, J. Torres, S. Muñoz Tsilia, S. Zhang, J. -Y. Barrado, D. Béjar, V. J. S. Bouy, H. Burgasser, A. Cruz, P. Lodieu, N. Buitrago, P. Mas Phan-Bao, N. Solano, E. Tata, R. Goldman, B. Mohandasan, A. Reylé, C. Smart, R. L. Aghanim, N. Altieri, B. Amara, A. Andreon, S. Auricchio, N. Baccigalupi, C. Baldi, M. Balestra, A. Bardelli, S. Battaglia, P. Biviano, A. Bonchi, A. Branchini, E. Brescia, M. Brinchmann, J. 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. Conselice, C. J. Conversi, L. Copin, Y. Courbin, F. Courtois, H. M. Cropper, M. Cuby, J. -G. Da Silva, A. Degaudenzi, H. De Lucia, G. Dolding, C. Dole, H. Douspis, M. Dubath, F. Dupac, X. Dusini, S. Escoffier, S. Farina, M. Faustini, F. Ferriol, S. Fotopoulou, S. Frailis, M. Franceschi, E. Galeotta, S. George, K. Gillis, B. Giocoli, C. Gómez-Alvarez, P. Gracia-Carpio, J. Granett, B. R. Grazian, A. Grupp, F. Haugan, S. V. H. Hoar, J. Holmes, W. Hormuth, F. Hornstrup, A. Jahnke, K. Jhabvala, M. Keihänen, E. Kermiche, S. Kiessling, A. Kubik, B. Kuijken, K. Kümmel, M. Kunz, M. Kurki-Suonio, H. Boulc'h, Q. Le Brun, A. M. C. Le Ligori, S. Lilje, P. B. Lindholm, V. Lloro, I. Mainetti, G. Maino, D. Maiorano, E. Mansutti, O. Marggraf, O. Martinelli, M. Martinet, N. Marulli, F. Massey, R. Medinaceli, E. Mei, S. Mellier, Y. Meneghetti, M. Merlin, E. Meylan, G. Mora, A. Moresco, M. Moscardini, L. Nakajima, R. Neissner, C. Niemi, S. -M. Padilla, C. Paltani, S. Pasian, F. Pedersen, K. Percival, W. J. Pettorino, V. Pires, S. Polenta, G. Poncet, M. Popa, L. A. Pozzetti, L. Raison, F. Rebolo, R. Renzi, A. Rhodes, J. Riccio, G. Romelli, E. Roncarelli, M. Saglia, R. Sakr, Z. Sapone, D. Sartoris, B. Schewtschenko, J. A. Schirmer, M. Schneider, P. Secroun, A. Seidel, G. Seiffert, M. Serrano, S. Simon, P. Sirignano, C. Sirri, G. Stanco, L. Steinwagner, J. Tallada-Crespí, P. Taylor, A. N. Tereno, I. Toft, S. Toledo-Moreo, R. Torradeflot, F. Tsyganov, A. Tutusaus, I. Valenziano, L. Valiviita, J. Vassallo, T. Kleijn, G. Verdoes Veropalumbo, A. Wang, Y. Weller, J. Zacchei, A. Zamorani, G. Zerbi, F. M. Zucca, E. Martín-Fleitas, J. Scottez, V.
contents	We present a catalogue of 5306 new ultracool dwarf (UCD) candidates in the three Euclid Deep Fields in the Q1 data release. They range from late M to late T dwarfs, and include 1200 L and T dwarfs. A total of 546 objects have been spectroscopically confirmed, including 329 L dwarfs and 26 T dwarfs. We also provide empirical Euclid colours as a function of spectral type. Our UCD selection criteria are based only on colour ($I_\mathrm{E}-Y_\mathrm{E}>2.5$). The combined requirement for optical detection and stringent signal-to-noise ratio threshold ensure a high purity of the sample, but at the expense of completeness, especially for T dwarfs. The detections range from magnitudes 19 and 24 in the near-infrared bands, and extend down to 26 in the optical band. We discuss Euclid's capability to identify UCD candidates based on its photometric passbands. The average surface density of detected UCDs on the sky is approximately 100 objects per $\mathrm{deg}^2$, including 20 L and T dwarfs per $\mathrm{deg}^2$. This leads to an expectation of at least 1.4 million ultracool dwarfs in the final data release of the Euclid Wide Survey, including at least $300\,000$ L dwarfs, and more than 2600 T dwarfs, using the strict selection criteria from this work.
format	Preprint
id	arxiv_https___arxiv_org_abs_2503_22497
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	Euclid: Quick Data Release (Q1) -- A photometric search for ultracool dwarfs in the Euclid Deep Fields Žerjal, M. Dominguez-Tagle, C. Vitas, N. Sedighi, N. Martín, E. L. Osorio, M. R. Zapatero Olivares, J. Torres, S. Muñoz Tsilia, S. Zhang, J. -Y. Barrado, D. Béjar, V. J. S. Bouy, H. Burgasser, A. Cruz, P. Lodieu, N. Buitrago, P. Mas Phan-Bao, N. Solano, E. Tata, R. Goldman, B. Mohandasan, A. Reylé, C. Smart, R. L. Aghanim, N. Altieri, B. Amara, A. Andreon, S. Auricchio, N. Baccigalupi, C. Baldi, M. Balestra, A. Bardelli, S. Battaglia, P. Biviano, A. Bonchi, A. Branchini, E. Brescia, M. Brinchmann, J. 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. Conselice, C. J. Conversi, L. Copin, Y. Courbin, F. Courtois, H. M. Cropper, M. Cuby, J. -G. Da Silva, A. Degaudenzi, H. De Lucia, G. Dolding, C. Dole, H. Douspis, M. Dubath, F. Dupac, X. Dusini, S. Escoffier, S. Farina, M. Faustini, F. Ferriol, S. Fotopoulou, S. Frailis, M. Franceschi, E. Galeotta, S. George, K. Gillis, B. Giocoli, C. Gómez-Alvarez, P. Gracia-Carpio, J. Granett, B. R. Grazian, A. Grupp, F. Haugan, S. V. H. Hoar, J. Holmes, W. Hormuth, F. Hornstrup, A. Jahnke, K. Jhabvala, M. Keihänen, E. Kermiche, S. Kiessling, A. Kubik, B. Kuijken, K. Kümmel, M. Kunz, M. Kurki-Suonio, H. Boulc'h, Q. Le Brun, A. M. C. Le Ligori, S. Lilje, P. B. Lindholm, V. Lloro, I. Mainetti, G. Maino, D. Maiorano, E. Mansutti, O. Marggraf, O. Martinelli, M. Martinet, N. Marulli, F. Massey, R. Medinaceli, E. Mei, S. Mellier, Y. Meneghetti, M. Merlin, E. Meylan, G. Mora, A. Moresco, M. Moscardini, L. Nakajima, R. Neissner, C. Niemi, S. -M. Padilla, C. Paltani, S. Pasian, F. Pedersen, K. Percival, W. J. Pettorino, V. Pires, S. Polenta, G. Poncet, M. Popa, L. A. Pozzetti, L. Raison, F. Rebolo, R. Renzi, A. Rhodes, J. Riccio, G. Romelli, E. Roncarelli, M. Saglia, R. Sakr, Z. Sapone, D. Sartoris, B. Schewtschenko, J. A. Schirmer, M. Schneider, P. Secroun, A. Seidel, G. Seiffert, M. Serrano, S. Simon, P. Sirignano, C. Sirri, G. Stanco, L. Steinwagner, J. Tallada-Crespí, P. Taylor, A. N. Tereno, I. Toft, S. Toledo-Moreo, R. Torradeflot, F. Tsyganov, A. Tutusaus, I. Valenziano, L. Valiviita, J. Vassallo, T. Kleijn, G. Verdoes Veropalumbo, A. Wang, Y. Weller, J. Zacchei, A. Zamorani, G. Zerbi, F. M. Zucca, E. Martín-Fleitas, J. Scottez, V. Solar and Stellar Astrophysics Earth and Planetary Astrophysics Astrophysics of Galaxies Instrumentation and Methods for Astrophysics We present a catalogue of 5306 new ultracool dwarf (UCD) candidates in the three Euclid Deep Fields in the Q1 data release. They range from late M to late T dwarfs, and include 1200 L and T dwarfs. A total of 546 objects have been spectroscopically confirmed, including 329 L dwarfs and 26 T dwarfs. We also provide empirical Euclid colours as a function of spectral type. Our UCD selection criteria are based only on colour ($I_\mathrm{E}-Y_\mathrm{E}>2.5$). The combined requirement for optical detection and stringent signal-to-noise ratio threshold ensure a high purity of the sample, but at the expense of completeness, especially for T dwarfs. The detections range from magnitudes 19 and 24 in the near-infrared bands, and extend down to 26 in the optical band. We discuss Euclid's capability to identify UCD candidates based on its photometric passbands. The average surface density of detected UCDs on the sky is approximately 100 objects per $\mathrm{deg}^2$, including 20 L and T dwarfs per $\mathrm{deg}^2$. This leads to an expectation of at least 1.4 million ultracool dwarfs in the final data release of the Euclid Wide Survey, including at least $300\,000$ L dwarfs, and more than 2600 T dwarfs, using the strict selection criteria from this work.
title	Euclid: Quick Data Release (Q1) -- A photometric search for ultracool dwarfs in the Euclid Deep Fields
topic	Solar and Stellar Astrophysics Earth and Planetary Astrophysics Astrophysics of Galaxies Instrumentation and Methods for Astrophysics
url	https://arxiv.org/abs/2503.22497