ZTF SN Ia DR2: Exploring SN Ia properties in the vicinity of under-dense environments
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
- C. Ravoux (ORCID: https://orcid.org/0000-0002-3500-6635)
- Reed Riddle (ORCID: https://orcid.org/0000-0002-0387-370X)
- J. Terwel (ORCID: https://orcid.org/0000-0001-9834-3439)
- G. Dimitriadis (ORCID: https://orcid.org/0000-0001-9494-179X)
- F. Ruppin (ORCID: https://orcid.org/0000-0002-0955-8954)
- L. Galbany (ORCID: https://orcid.org/0000-0002-1296-6887)
- M Ginolin (ORCID: https://orcid.org/0009-0004-5311-9301)
- Young-Lo Kim (ORCID: https://orcid.org/0000-0002-1031-0796)
- M. R. Smith (ORCID: https://orcid.org/0000-0002-3321-1432)
- T. E. Müller-Bravo (ORCID: https://orcid.org/0000-0003-3939-7167)
- M. Aubert
- A. Goobar (ORCID: https://orcid.org/0000-0002-4163-4996)
- F. Feinstein (ORCID: https://orcid.org/0000-0001-5548-3466)
- Alice Townsend (ORCID: https://orcid.org/0000-0001-6343-3362)
- J. Sollerman (ORCID: https://orcid.org/0000-0003-1546-6615)
- P. Rosnet (ORCID: https://orcid.org/0000-0002-6099-7565)
- M. Rigault (ORCID: https://orcid.org/0000-0002-8121-2560)
- D. Fouchez (ORCID: https://orcid.org/0000-0002-7496-3796)
- Frank J. Masci (ORCID: https://orcid.org/0000-0002-8532-9395)
- Thomas de Jaeger (ORCID: https://orcid.org/0000-0001-6069-1139)
- Leander Lacroix (ORCID: https://orcid.org/0000-0003-0629-5746)
- Bastien Carreres (ORCID: https://orcid.org/0000-0002-7234-844X)
- J. Johansson (ORCID: https://orcid.org/0000-0001-5975-290X)
- B. Rusholme (ORCID: https://orcid.org/0000-0001-7648-4142)
- B Popovic (ORCID: https://orcid.org/0000-0002-8012-6978)
- U. Burgaz (ORCID: https://orcid.org/0000-0003-0126-3999)
- C Barjou-Delayre
- Roger M. Smith (ORCID: https://orcid.org/0000-0001-7062-9726)
- M. M. Kasliwal (ORCID: https://orcid.org/0000-0002-5619-4938)
- B. Racine (ORCID: https://orcid.org/0000-0001-8861-3052)
- N. Regnault (ORCID: https://orcid.org/0000-0001-7029-7901)
- D. Rosselli (ORCID: https://orcid.org/0000-0001-6839-1421)
Institutions
- Université Claude Bernard Lyon 1 (FR)
- California Institute of Technology (US)
- Centre National de la Recherche Scientifique (FR)
- Institute of Space Sciences (ES)
- Stockholm University (SE)
- Duke University (US)
- Lyon College (US)
- Université Clermont Auvergne (FR)
- Université Paris Cité (FR)
- Trinity College Dublin (IE)
- Aix-Marseille Université (FR)
- Humboldt-Universität zu Berlin (DE)
- Sorbonne Université (FR)
- Institut d'Estudis Espacials de Catalunya (ES)
- Centre de physique des particules de Marseille (FR)
- Laboratoire de Physique Nucléaire et de Hautes Énergies (FR)
- Nordic Optical Telescope (ES)
- Institut National de Physique Nucléaire et de Physique des Particules (FR)
- AlbaNova (SE)
- Institute of Nuclear Physics of Lyon (FR)
- Infrared Processing and Analysis Center (US)
- Institut de Physique des 2 Infinis de Lyon (FR)
- Lancaster University (GB)
Publication Details
- Journal
- Astronomy and Astrophysics
- Published
- 2025-02-01
- DOI
- https://doi.org/10.1051/0004-6361/202450951
- Citations
- 1
- Primary Topic
- Gamma-ray bursts and supernovae
- Type
- article
- Field-Weighted Citation Impact
- 1.15
Funders
- Science and Technology Facilities Council