Euclid Quick Data Release (Q1). The Euclid view on Planck galaxy protocluster candidates: towards a probe of the highest sites of star formation at cosmic noon

We search for galaxy protoclusters at redshifts $z > 1.5$ in the first data release (Q1) of the $\textit{Euclid}$ survey. We make use of the catalogues delivered by the $\textit{Euclid}$ Science Ground Segment (SGS). After a galaxy selection on the $H_\textrm{E}$ magnitude and on the photometric redshift quality, we undertake the search using the $\texttt{DETECTIFz}$ algorithm, an overdensity finder based on Delaunay tessellation that uses photometric redshift probability distributions through Monte Carlo simulations. In this pilot study, we conduct a search in the 11 $\textit{Euclid}$ tiles that contain previously known $\textit{Planck}$ high star-forming galaxy protocluster candidates and focus on the two detections that coincide with these regions. These counterparts lie at photometric redshifts $z_\textrm{ph}=1.63^{+0.19}_{-0.23}$ and $z_\textrm{ph}=1.56^{+0.18}_{-0.21}$ and have both been confirmed by two other independent protocluster detection algorithms. We study their colours, their derived stellar masses and star-formation rates, and we estimate their halo mass lower limits. We investigate whether we are intercepting these galaxy overdensities in their `dying' phase, such that the high star-formation rates would be due to their last unsustainable starburst before transitioning to groups or clusters of galaxies. Indeed, some galaxy members are found to lie above the main sequence of galaxies (star-formation rate versus stellar mass). These overdense regions occupy a specific position in the dark matter halo mass / redshift plane where forming galaxy clusters are expected to have experienced a transition between cold flows to shock heating in the halo. Finally, we empirically update the potential for galaxy protocluster discoveries at redshift up to $z \simeq3$ (wide survey) and $z \simeq5.5$ (deep survey) with $\textit{Euclid}$ for the next data release (DR1).

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ArXiv.org
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2025-03-27
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Astronomy and Astrophysical Research
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article

Euclid Quick Data Release (Q1). The Euclid view on Planck galaxy protocluster candidates: towards a probe of the highest sites of star formation at cosmic noon

M. Fumana, F Passalacqua, S Casas, G. Seidel et al.
ArXiv.org
Astronomy and Astrophysical Research
article

Euclid Quick Data Release (Q1). The Euclid view on Planck galaxy protocluster candidates: towards a probe of the highest sites of star formation at cosmic noon

M. Fumana, F Passalacqua, S Casas, G. Seidel, E.A Magnier, V. Lindholm, M. Langer, S Sacquegna, A Balestra, N. Auricchio, D. Le Mignant, I Tereno, Leigh C. Smith, F. Marulli, S Toft, W. Holmes, J. Hjorth, A. Blanchard, M. Roncarelli, N. Dagoneau, E. Gaztanaga, R Nakajima, S Bardelli, F. Raison, S. Nadathur, D. Sapone, A.G Ferrari, G. F. Lesci, H Hildebrandt, S. Di Domizio, A. Navarro-Alsina, P. G. Ferreira, C. Padilla, A. Loureiro, G. de Lucia, A. Franco, Paola Dimauro, Pietro Battaglia, Alex D. Hall, J. Rhodes, P. Schneider, Tanguy DUSSERRE, A. Troja, A. Renzi, Elena Sellentin, J.J Diaz, L. A. Popa, L. Guzzo, G. Desprez, C. S. Carvalho, T. Contini, F Faustini, Daniele Bertacca, J. R. Weaver, G Castignani, Claudio Moretti, A.M Di Giorgio, M Schirmer, K Jahnke, C. Baccigalupi, T. Schrabback, L. Gabarra, M Miluzio, Stephen Gwyn, D. Bonino, A. Grazian, M. Poncet, E. Merlin, S. -M. Niemi, T. Vassallo, A Enia, C. Valieri, C. Neissner, I. Tutusaus, Valérie Gautard, G. Polenta, R. Toledo-Moreo, M. Huertas-Company, B. Camacho Quevedo, J. Hoar, S Bruton, M. Moresco, Nataliya Ramos-Chernenko, G. Rodighiero, B. R. Granett, Y Fang, L Moscardini, S. A. Stanford, K George, D. Bonino, E. Bozzo, J.W Nightingale, A Costille, T.I Liaudat, M. Costanzi, M. Martinelli, M Ballardini, D. B. Sanders, D Scott, P. B. Lilje, S Quai, V Capobianco, C. Colodro-Conde, A. Biviano, I.A Zinchenko, M Lembo, G. Morgante, B. Joachimi, I Risso, N. Aghanim, K Paterson, V. Allevato, C Sirignano, M. Maturi, J. Carretero, G. Mainetti, D. Karagiannis, S. Escoffier, N. R. Napolitano, A. R. Cooray, J Brinchmann, G. Meylan, L Blot, N. A. Walton, E. Medinaceli, W. Gillard, C. Giocoli, F. De Paolis, R. Maoli, H. Degaudenzi, E. Maiorano, M. Migliaccio, A. Hornstrup, F Pasian, Marcelo Farina, S. Davini, A Calabrò, Florian Sarron, Sergey Kruk, F. M. Zerbi, A. N. Taylor, M. Béthermin, P. Bergamini, E. Branchini, B. Altieri, A. Secroun, F. Hormuth, S. Camera, F. Mannucci, M. Magliocchetti, M Jhabvala, S. Galeotta, A. Venhola, V. Kansal, S Anselmi, S. Serrano, H Kurki-Suonio, S Borgani, L. Legrand, F Lepori, F. Giacomini, M Tenti, P. Fosalba, H. Dannerbauer, J. Weller, L. Patrizii, A Amara, E. Franceschi, A. Philippon, M. Sereno, P. Monaco, A. Cappi, Y Wang, J.A Schewtschenko, W. G. Hartley, M. Brescia, Konrad H. Kuijken, K. Kiiveri, T Castro, R Teyssier, N. Martinet, M. Radovich, J. Gracia-Carpio, A. Kiessling, C. Porciani, I.T Andika, Savvas Nesseris, S. Maurogordato, Y. Mellier, K Tanidis, M. Polletta, R. Cabanac, F. Finelli⋆, G. Verdoes Kleijn, R Farinelli, B. Gillis, M. Cropper, M Viel, P Vielzeuf, G. Gozaliasl, V. Scottez, R. Saglia, P. Bergamini, W. J. Percival, R Massey, E Zucca, P. Šimon, S. J. Liu, P. Hudelot, H. I. Teplitz, C. Carbone, Shoubaneh Hemmati, S. Kermiche, J. Steinwagner, E. Soubrie, E Sarpa, S. Desai, G. Congedo, M. Castellano, J. M. Diego, G Sirri, K. Pedersen, O. Mansutti, S. Ferriol, V. Pettorino, F. Torradeflot, Giulio Fabbian, A Veropalumbo, A Pezzotta, A.M.C Le Brun, M. Frailis, C. Burigana, I Lloro, S Cavuoti, L. Pozzetti, Y. Akrami, F. Atrio‐Barandela, F. Grupp, H. M. Courtois, S Andreon, F. Cogato, D Sciotti, A. Da Silva, A Pisani, L. Maurin, G. Riccio, C. M. Gutiérrez, S Alvi, A. Cimatti, G Maggio, M Kunz, Pierre-Alain Duc, G Leroy, L. Stančo, C. A. J. Duncan, B. Sartoris, S. Pires, C. C. Kirkpatrick, N Mauri, O. Marggraf, H. Dole, S Marcin, G. Zamorani, M. Archidiacono, M. Baldi, Robert C. Nichol, F. Shankar, K. Ganga, V. Pettorino, R. Rebolo, G Morgante, A. Schneider, A. Gruppuso, M. Melchior, Brenda L. Frye, J. Macias-Perez, S. V. H. Haugan, S. Paltani, M. Wiesmann, Z. Sakr, A. Ealet, K Naidoo, L. Conversi, K Benson, J.A. Escartin Vigo, D. Di Ferdinando, B. Kubik, J Valiviita, A. H. Gonzalez, M Bolzonella, X. Dupac, M Tucci, C. J. A. P. Martins, S. Fotopoulou, A Mora, G. Testera, S. Dusini, G Verza, F Caro, N. Mai, L Valenziano, A. Zacchei, F. Gianotti, J Lesgourgues, E. Romelli, F. Dubath, D Maino, S. Tosi, C. Dolding, M Guidi, Jenny G. Sorce, S Ligori, A Finoguenov, D Potter, C.J Conselice, D Vergani, L. Leuzzi, Y Kang, O. Chapuis, A. Garic, I. -E. Mellouki
article en

Abstract

We search for galaxy protoclusters at redshifts $z > 1.5$ in the first data release (Q1) of the $\textit{Euclid}$ survey. We make use of the catalogues delivered by the $\textit{Euclid}$ Science Ground Segment (SGS). After a galaxy selection on the $H_\textrm{E}$ magnitude and on the photometric redshift quality, we undertake the search using the $\texttt{DETECTIFz}$ algorithm, an overdensity finder based on Delaunay tessellation that uses photometric redshift probability distributions through Monte Carlo simulations. In this pilot study, we conduct a search in the 11 $\textit{Euclid}$ tiles that contain previously known $\textit{Planck}$ high star-forming galaxy protocluster candidates and focus on the two detections that coincide with these regions. These counterparts lie at photometric redshifts $z_\textrm{ph}=1.63^{+0.19}_{-0.23}$ and $z_\textrm{ph}=1.56^{+0.18}_{-0.21}$ and have both been confirmed by two other independent protocluster detection algorithms. We study their colours, their derived stellar masses and star-formation rates, and we estimate their halo mass lower limits. We investigate whether we are intercepting these galaxy overdensities in their `dying' phase, such that the high star-formation rates would be due to their last unsustainable starburst before transitioning to groups or clusters of galaxies. Indeed, some galaxy members are found to lie above the main sequence of galaxies (star-formation rate versus stellar mass). These overdense regions occupy a specific position in the dark matter halo mass / redshift plane where forming galaxy clusters are expected to have experienced a transition between cold flows to shock heating in the halo. Finally, we empirically update the potential for galaxy protocluster discoveries at redshift up to $z \simeq3$ (wide survey) and $z \simeq5.5$ (deep survey) with $\textit{Euclid}$ for the next data release (DR1).

ArXiv.org
Université Paris Cité (FR), Aix-Marseille Université (FR), Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR), Université Paris-Saclay (FR), Observatoire de Paris (FR), Institut d'Astrophysique de Paris (FR), Laboratoire AstroParticule et Cosmologie (FR), European Space Astronomy Centre (ES), Centre de physique des particules de Marseille (FR), CEA Paris-Saclay (FR), Laboratoire de Physique Subatomique et de Cosmologie (FR), Centre de Calcul de l’Institut National de Physique Nucléaire et de Physique des Particules (FR), Institute of Nuclear Physics of Lyon (FR), Institut de Recherche sur les Lois Fondamentales de l'Univers (FR), Institut de Recherche en Astrophysique et Planétologie (FR), Institut de Physique des 2 Infinis de Lyon (FR)
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