ZTF SN Ia DR2: Exploring SN Ia properties in the vicinity of under-dense environments
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arXiv
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| Natura: | Preprint |
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2024
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| author | Aubert, M. Rosnet, P. Popovic, B. Ruppin, F. Smith, M. Rigault, M. Dimitriadis, G. Goobar, A. Johansson, J. Barjou-Delayre, C. Burgaz, U. Carreres, B. Feinstein, F. Fouchez, D. Galbany, L. Ginolin, M. de Jaeger, T. Kasliwal, M. M. Kim, Y. -L. Lacroix, L. Masci, F. J. Müller-Bravo, T. E. Racine, B. Ravoux, C. Regnault, N. Riddle, R. L. Rosselli, D. Rusholme, B. Smith, R. Sollerman, J. Terwel, J. H. Townsend, A. |
| author_facet | Aubert, M. Rosnet, P. Popovic, B. Ruppin, F. Smith, M. Rigault, M. Dimitriadis, G. Goobar, A. Johansson, J. Barjou-Delayre, C. Burgaz, U. Carreres, B. Feinstein, F. Fouchez, D. Galbany, L. Ginolin, M. de Jaeger, T. Kasliwal, M. M. Kim, Y. -L. Lacroix, L. Masci, F. J. Müller-Bravo, T. E. Racine, B. Ravoux, C. Regnault, N. Riddle, R. L. Rosselli, D. Rusholme, B. Smith, R. Sollerman, J. Terwel, J. H. Townsend, A. |
| contents | The unprecedented statistics of detected Type Ia supernovae (SNe Ia) brought by the Zwicky Transient Facility enables us to probe the impact of the Large-Scale Structure on the properties of these objects. The goal of this paper is to explore the possible impact of the under-dense part of the large-scale structure on the intrinsic SALT2 light curve properties of SNe Ia and uncover possible biases in SN Ia analyses. With a volume-limited selection of ZTF-Cosmo-DR2 Type Ia supernovae overlapping with the SDSS-DR7 survey footprint, we investigate the distribution of their properties with regard to voids detected in the SDSS-DR7 galaxy sample. We further use Voronoi volumes as proxy for local density environments within the large-scale structure. We find a moderate dependency of the stretch toward the localisation around the void centre and none when considering colour. The local Voronoi volumes mostly affect the fraction of low/high stretch supernovae. With the current statistics available, 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 supernova analyses. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_11680 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | ZTF SN Ia DR2: Exploring SN Ia properties in the vicinity of under-dense environments Aubert, M. Rosnet, P. Popovic, B. Ruppin, F. Smith, M. Rigault, M. Dimitriadis, G. Goobar, A. Johansson, J. Barjou-Delayre, C. Burgaz, U. Carreres, B. Feinstein, F. Fouchez, D. Galbany, L. Ginolin, M. de Jaeger, T. Kasliwal, M. M. Kim, Y. -L. Lacroix, L. Masci, F. J. Müller-Bravo, T. E. Racine, B. Ravoux, C. Regnault, N. Riddle, R. L. Rosselli, D. Rusholme, B. Smith, R. Sollerman, J. Terwel, J. H. Townsend, A. Cosmology and Nongalactic Astrophysics The unprecedented statistics of detected Type Ia supernovae (SNe Ia) brought by the Zwicky Transient Facility enables us to probe the impact of the Large-Scale Structure on the properties of these objects. The goal of this paper is to explore the possible impact of the under-dense part of the large-scale structure on the intrinsic SALT2 light curve properties of SNe Ia and uncover possible biases in SN Ia analyses. With a volume-limited selection of ZTF-Cosmo-DR2 Type Ia supernovae overlapping with the SDSS-DR7 survey footprint, we investigate the distribution of their properties with regard to voids detected in the SDSS-DR7 galaxy sample. We further use Voronoi volumes as proxy for local density environments within the large-scale structure. We find a moderate dependency of the stretch toward the localisation around the void centre and none when considering colour. The local Voronoi volumes mostly affect the fraction of low/high stretch supernovae. With the current statistics available, 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 supernova analyses. |
| title | ZTF SN Ia DR2: Exploring SN Ia properties in the vicinity of under-dense environments |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2406.11680 |