Year: 2025
Type: article
Abstract: Context. The unprecedented statistics of detected Type Ia supernovae (SNe Ia) brought by the Zwicky Transient Facility (ZTF) enable us to probe the impact of the large-scale structure (LSS) on the properties of these objects. Aims. The goal of this paper is to explore the possible impact of the under-dense part of the LSS on the intrinsic SALT2 light-curve properties of SNe Ia and uncover possible biases in SN Ia analyses. Methods. With a volume-limited selection of ZTF-Cosmo-DR2 SNe Ia overlapping with the SDSS-DR7 survey footprint, we investigated the distribution of their properties with regard to voids detected in the SDSS-DR7 galaxy sample. We further used Voronoi volumes as a proxy for local density environments within the LSS. Results. We find a moderate dependency of the stretch on the localisation around the void centre and none when considering colour. The local Voronoi volumes mostly affect the fraction of low- and high-stretch supernovae. Conclusions. With the presently available statistics, we consider that the impact of high- or low-local-density environment can be considered as a proxy for the colour of the host galaxy. Under-dense environments should not cause any biases in analyses of supernova.
Authors: M. Aubert, P. Rosnet, B. Popovic, F. Ruppin, M. Smith, M. Rigault, G. Dimitriadis, A. Goobar, J. Johansson, C. Barjou-Delayre, U. Burgaz, B. Carreres, F. Feinstein, D. Fouchez, L. Galbany, M. Ginolin, T. de Jaeger, M. M. Kasliwal, Y.-L. Kim, L. Lacroix, F. J. Masci, T. E. Müller-Bravo, B. Racine, C. Ravoux, N. Regnault, R. L. Riddle, D. Rosselli, B. Rusholme, R. Smith, J. Sollerman, J. H. Terwel, A. Townsend
Institutions: Centre National de la Recherche Scientifique, Université Clermont Auvergne, Laboratoire de Physique de Clermont Auvergne, Institut National de Physique Nucléaire et de Physique des Particules, Lyon 1 Université, Institut de Physique des 2 Infinis de Lyon, Lancaster University, Trinity College Dublin, Stockholm University, Duke University, Aix-Marseille Université, Centre de physique des particules de Marseille, Institute of Space Sciences, Institut d'Estudis Espacials de Catalunya, Université Paris Cité, Sorbonne Université, Laboratoire de Physique Nucléaire et de Hautes Énergies, California Institute of Technology, Infrared Processing and Analysis Center, AlbaNova, Nordic Optical Telescope, Humboldt-Universität zu Berlin
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, Alfred P. Sloan Foundation, Gordon and Betty Moore Foundation, California Institute of Technology, European Commission, Trinity College Dublin, Agence Nationale de la Recherche, Weizmann Institute of Science, Knut och Alice Wallenbergs Stiftelse, Max-Planck-Gesellschaft, Vetenskapsrådet, Ministerio de Ciencia e Innovación, Stockholms Universitet, Horizon 2020 Framework Programme, Science and Technology Facilities Council, Deutsches Elektronen-Synchrotron, Agència de Gestió d'Ajuts Universitaris i de Recerca, Agencia Estatal de Investigación, Institut National de Physique Nucléaire et de Physique des Particules, H2020 European Research Council
Awards: G1175115578, Charting new physics with time-domain astronomy, G1530525900, G1855990336, The SED Machine: an Efficient Transient Classifier, G1938211519, G2018370741, G2262748287, G2309174360, G2601397997, Exploring & Exploiting the Dynamic Optical Sky, G2849891921, G288263039, G2998051782, G300979063, G3439265645, G3459355364, G3480869486, G3518538256, G3681454997, G4019291869, G4042783231, G425668148, G430777504, G4655338613, Type Ia supernovae: from explosions to cosmology, G4881091899, G5080475149, G5195188938, G5421974903, Understanding Type Ia SuperNovae for Accurate Cosmology, G5805502524, Lancaster University Observational Astrophysics 2021-2024, G5852091828, G617610489, G7001747737, G7099350353, G7169023097, G7297159037, G7441047379, G7476612352, G8324017279, G8775481269, A golden nearby SN sample from the Zwicky Transient Facility-II Survey (ZTF-II), G8924351487, G917015191, G99296377
OpenAlex ID: W7125269285
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