Euclid Quick Data Release (Q1) Euclid spectroscopy of quasars. 2. Physical properties from spectral fitting
Year: 2026
Type: preprint
Abstract: A substantial volume of spectroscopic data has become available with the Euclid Data Release (Q1), which represents a unique opportunity to study quasars (QSOs) in the Euclid Deep Fields, provide spectroscopic measurements, and estimates of their physical properties. We present results from a spectroscopic analysis of QSOs with HE < = 22.5 using Q1. We use external catalogues from surveys such as the Dark Energy Spectroscopic Instrument (DESI), Gaia, Wide-field Infrared Survey Explorer (WISE), and the QUasars as BRIght beacons for Cosmology in the Southern hemisphere (QUBRICS) for the QSO selection and redshift determination, totaling 5489 QSOs. We provide measurements of the line fluxes, full widths at half-maximum, and respective uncertainties for the emission lines of Euclid spectra based on fitting statistica and signal-to-noise ratio (S/N). Of the total 5489 QSOs, 5387 are successfully fitted. We find that 45% of the total number of successfully fitted spectra are free of problematic artefacts allowing for trustworthy measurements. Our final Euclid QSO sample spans a redshift range of 0.01 < = z < = 4.8 and shows a median spectral index of αλ = - 1.17. Finally, we estimate black hole masses with single epoch methods for 1213 sources, using the He I λ10830, Pa β, H α, H β, and Mg II emission lines, obtainning a mean logarithmc mass of log10 (MBH / Msolar) = 8.7 and mean Edigton ratio of λEdd = 0.34. The catalogue with the physical properties of this sample together with the software developed for the analysis is available online for scientific exploitation.
Source: arXiv (Cornell University)
Authors: Euclid Collaboration, Calhau, J., Calderone, G., Feltre, A., Scialpi, M., Allevato, V., Landt, H., Ricci, F., Fu, Y., Spinoglio, L., Shankar, F., Nicastro, L., Viitanen, A., Zamorani, G., Mezcua, M., La Franca, F., Stern, D., Lusso, E., Wolf, J., Paulino-Afonso, A., Andreon, S., Auricchio, N., Baccigalupi, C., Baldi, M., Bardelli, S., Battaglia, P., Biviano, A., Bolzonella, M., Branchini, E., Brescia, M., Camera, S., Capobianco, V., Carbone, C., Carretero, J., 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., Degaudenzi, H., De Lucia, G., Dole, H., Dubath, F., Dupac, X., Dusini, S., Ealet, A., Escoffier, S., Farina, M., Ferriol, S., Finelli, F., Fotopoulou, S., Fourmanoit, N., Frailis, M., Fumana, M., Gabarra, L., Galeotta, S., George, K., Gillis, B., Giocoli, C., Gracia-Carpio, J., Grazian, A., Grupp, F., Hartley, W. G., Haugan, S. V. H., Hemmati, S., Holmes, W., Hook, I. M., Hormuth, F., Hornstrup, A., Huertas-Company, M., Jahnke, K., Jhabvala, M., Joachimi, B., Kermiche, S., Kiessling, A., Kubik, B., Kümmel, M., Kunz, M., Kurki-Suonio, H., Brun, A. M. C. Le, Brun, V. Le, Ligori, S., Lilje, P. B., Lindholm, V., Lloro, I., Magliocchetti, M., Mainetti, G., Mansutti, O., Marggraf, O., Martinelli, M., Martinet, N., Marulli, F., Massey, R. J., Mauri, N., Medinaceli, E., Mei, S., Meneghetti, M., Merlin, E., Meylan, G., Monaco, P., Mora, A., Moresco, M., Moretti, C., Moscardini, L., Neissner, C., Niemi, S. -M., Nightingale, J. W., Padilla, C., Paltani, S., Pasian, F., Pedersen, K., Percival, W. J., Pettorino, V., Pezzotta, A., Pires, S., Polenta, G., Poncet, M., Popa, L. A., Pozzetti, L., Raison, F., Rebolo, R., Renzi, A., Rhodes, J., Riccio, G., Risso, I., Romelli, E., Roncarelli, M., Rusholme, B., Saglia, R., Sakr, Z., Sapone, D., Sartoris, B., Schneider, P., Schrabback, T., Scodeggio, M., Secroun, A., Sihvola, E., Simon, P., Sirignano, C., Sirri, G., Stanco, L., Surace, C., Tallada-Crespí, P., Taylor, A. N., Teplitz, H. I., Tereno, I., Toft, S., Toledo-Moreo, R., Torradeflot, F., Tutusaus, I., Valiviita, J., Vassallo, T., Vibert, D., Wang, Y., Weller, J., Zacchei, A., Zucca, E., Ballardini, M., Bergamini, P., Borgani, S., Bozzo, E., Burigana, C., Cabanac, R., Cappi, A., Castro, T., Vigo, J. A. Escartin, García-Bellido, J., Gasparetto, T., Loureiro, A., Macias-Perez, J., Maoli, R., Metcalf, R. B., Pöntinen, M., Sarpa, E., Scottez, V., Sereno, M., Tenti, M., Tucci, M., Viel, M., Wiesmann, M., Barroso, J. A. Acevedo, Akrami, Y., Andika, I. T., Angora, G., Anselmi, S., Archidiacono, M., Arico, G., Atrio-Barandela, F., Aubourg, E., Baes, M., Baumont, L., Bazzanini, L., Bertacca, D., Bethermin, M., Beutler, F., Bisigello, L., Blanchard, A., Blot, L., Brown, M. L., Bruton, S., Calabro, A., Quevedo, B. Camacho, Caro, F., Carvalho, C. S., Cogato, F., Collett, T. E., Conseil, S., Cooray, A. R., Corcho-Caballero, P., Csizi, B., Cucciati, O., Dannerbauer, H., Davini, S., de Boer, T., De Paolis, F., Desprez, G., Díaz-Sánchez, A., Di Domizio, S., Diego, J. M., Duret, V., Enia, A., Fang, Y., Farina, A., Ferrari, A. G., Finoguenov, A., Fontanot, F., Franco, A., Ganga, K., Gavazzi, R., Gaztanaga, E., Ghaffari, Z., Giacomini, F., Gianotti, F., Gozaliasl, G., Gruppuso, A., Guidi, M., Gutierrez, C. M., Hall, A., Hatch, N. A., Hildebrandt, H., Hjorth, J., Kajava, J. J. E., Kang, Y., Kansal, V., Karagiannis, D., Kim, J., Kirkpatrick, C. C., Kovács, A., Kovačić, I., Koyama, K., Kruk, S., Lam, M. C., Leroy, G., Lesgourgues, J., Linke, L., Liu, S. J., Lopez, X. Lopez, Maggio, G., Mannucci, F., Marleau, F. R., Martins, C. J. A. P., Migliaccio, M., Miluzio, M., Morgante, G., Nadathur, S., Naidoo, K., Navarro-Alsina, A., Nersesian, A., Nesseris, S., Oppizzi, F., Pace, F., Paoletti, D., Passalacqua, F., Paterson, K., Patrizii, L., Pisani, A., Potter, D., Pratt, G. W., Quai, S., Radovich, M., Rodighiero, G., Rojas, K., Roster, W., Sacquegna, S., Sahlén, M., Sanders, D. B., Schneider, A., Sciotti, D., Sellentin, E., Serjeant, S., Sorce, J. G., Talia, M., Tanidis, K., Tao, C., Tarsitano, F., Testera, G., Teyssier, R., Tosi, S., Troja, A., Uhlemann, C., Valieri, C., Venhola, A., Verza, G., Vinciguerra, S., von Wietersheim-Kramsta, M., Wang, L., Wright, A. H.
Institutions: Astronomical Observatory of Capodimonte, Trieste Astronomical Observatory, Arcetri Astrophysical Observatory, National Institute for Astrophysics, University of Trento, University of Florence, Durham University, Roma Tre University, Astronomical Observatory of Rome, Leiden University, University of Groningen, Leiden Observatory, Institute for Space Astrophysics and Planetology, University of Southampton, Osservatorio di Astrofisica e Scienza dello Spazio, University of Geneva, University of Helsinki, Helsinki Institute of Physics, Institut d'Estudis Espacials de Catalunya, Jet Propulsion Laboratory, European Southern Observatory, Max Planck Institute for Astronomy, Universidade do Porto, Institute of Astrophysics and Space Sciences, Centro de Astrofísica da Universidade do Porto, Brera Astronomical Observatory, Scuola Internazionale Superiore di Studi Avanzati, Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, Institute for Fundamental Physics of the Universe, Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, University of Bologna, Istituto Nazionale di Fisica Nucleare, Sezione di Genova, University of Genoa, University of Naples Federico II, Istituto Nazionale di Fisica Nucleare, Sezione di Torino, Osservatorio Astrofisico di Torino, University of Turin, Port d'Informació Científica, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, University of Hawaiʻi at Mānoa, University of Hawaii System, Instituto de Astrofísica de Canarias, Royal Observatory, University of Edinburgh, University of Manchester, European Space Agency, European Space Astronomy Centre, European Space Research Institute, Lyon 1 Université, Centre National de la Recherche Scientifique, Institut National de Physique Nucléaire et de Physique des Particules, Institut de Physique des 2 Infinis de Lyon, Institució Catalana de Recerca i Estudis Avançats, Institute of Space Sciences, Institut de Ciències del Cosmos, University College London, Université Paris-Saclay, Institut d'Astrophysique Spatiale, Istituto Nazionale di Fisica Nucleare, Sezione di Padova, Aix-Marseille Université, Centre de physique des particules de Marseille, University of Bristol, University of Oxford, Ludwig-Maximilians-Universität München, Max Planck Institute for Extraterrestrial Physics, Osservatorio Astronomico di Padova, University of Oslo, California Institute of Technology, Infrared Processing and Analysis Center, Lancaster University, Technical University of Denmark, Université Paris Cité, Université Paris Sciences et Lettres, Observatoire de Paris, Sorbonne Université, Laboratoire d’Etudes du Rayonnement et de la Matière en Astrophysique et Atmosphères, Goddard Space Flight Center, Laboratoire d'Étude de l'Univers et des Phénomènes Extrêmes, SKA Observatory, Centre de Calcul de l’Institut National de Physique Nucléaire et de Physique des Particules, University of Bonn, Istituto Nazionale di Fisica Nucleare, Sezione di Roma I, Centre Pierre Binétruy, University of California, Berkeley, École Polytechnique Fédérale de Lausanne, University of Trieste, Institute for High Energy Physics, European Space Research and Technology Centre, Newcastle University, University of Copenhagen, University of Waterloo, Perimeter Institute, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Astrophysique, Instrumentation et Modélisation, Agenzia Spaziale Italiana, Centre National d'Études Spatiales, Institute of Space Science - INFLPR Subsidiary, Consejo Superior de Investigaciones Científicas, Universidad de La Laguna, University of Padua, Saint Joseph University, Instituto de Física Teórica, Institut de Recherche en Astrophysique et Planétologie, University of Chile, Universität Innsbruck, University of Lisbon, European Union, Universidad Politécnica de Cartagena, University of Ferrara, Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara, Fondazione ICSC Centro Nazionale di Ricerca in High Performance Computing, Big Data e Quantum Computing, Istituto di Radioastronomia di Bologna, Université Côte d'Azur, Lagrange Laboratory, Observatoire de la Côte d’Azur, Stockholm University, Imperial College London, Institut polytechnique de Grenoble, Sapienza University of Rome, Université Catholique de Lille, Institut d'Astrophysique de Paris, JUNIA, Case Western Reserve University, Laboratoire Univers et Théories, University of Milan, Istituto Nazionale di Fisica Nucleare, Sezione di Milano, Universidad de Salamanca, CEA Paris-Saclay, Institut de Recherche sur les Lois Fondamentales de l'Univers, Ghent University, Observatoire astronomique de Strasbourg, Université de Strasbourg, Kavli Institute for the Physics and Mathematics of the Universe, University of Portsmouth, University of California, Irvine, University of Salento, Istituto Nazionale di Fisica Nucleare, Sezione di Lecce, Instituto de Física de Cantabria, Aalto University, University of Nottingham, Ruhr University Bochum, University of Turku, ARC Centre of Excellence for Dark Matter Particle Physics, Swinburne University of Technology, University of the Western Cape, Konkoly Observatory, HUN-REN Research Centre for Astronomy and Earth Sciences, University of Rome Tor Vergata, University of Liège, University of Zurich, FHNW University of Applied Sciences and Arts Northwestern Switzerland, Collurania Teramo Observatory, Uppsala University, The Open University, Université de Lille, Centre de Recherche en Informatique, Signal et Automatique de Lille, Centrale Lille Institut, University of Nova Gorica, ETH Zurich, Institute for Particle Physics and Astrophysics, Kobayashi-Maskawa Institute for the Origin of Particles and the Universe, Nagoya University, Princeton University, Bielefeld University, University of Oulu, The Abdus Salam International Centre for Theoretical Physics (ICTP), Flatiron Institute, Space Research Organisation Netherlands
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: National Science Foundation, U.S. Department of Energy, National Aeronautics and Space Administration, Gordon and Betty Moore Foundation, European Space Agency, European Commission, Magyar Tudományos Akadémia, Agenzia Spaziale Italiana, Università degli Studi di Trento, Ministerio de Ciencia e Innovación, National Astronomical Observatory of Japan, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Agenția Spațială Română, Norsk Romsenter, Office of Science, Science and Technology Facilities Council, Fundação para a Ciência e a Tecnologia, Division of Astronomical Sciences, Lawrence Berkeley National Laboratory
Awards: G1044631029, G1079818582, G1143651532, G1286236842, G1632040200, G1813527838, G1863003419, G1969106598, G2137767461, G3083819904, G3439265645, G419881185, G42916606, G4501827968, G4655338613, G498139845, G526230902, G6652958823, G6876926712, Management and Operations of the National Optical Astronomy Observatory, G7354628648, G8103039852, G8284171658, G969889393
OpenAlex ID: W7213874277