Lightcurve Modelling of 2,205 ZTF DR2 Type Ia Supernovae: Implications for SN Ia Physics and Cosmology

Clicks: 15
ID: 328872
2026
Free PDF
Article Quality & Performance Metrics
Overall Quality
Not rated
Combines reader engagement with the AI quality analysis. This article has not been analysed, so there is no overall score — reader engagement is measured and shown alongside.
AI Quality Assessment
Not analyzed
Readership in this journal
Emerging

Ranked #894 of 1,339 articles by views in monthly notices of the royal astronomical society

Most read Least read

Bar heights use a square-root scale. Only the 120 most-read articles are drawn; the journal has 1,339 in total.

Mint this article as an NFT
Not yet minted

Create a permanent, verifiable on-chain record of this article on the Scimatic Network. The NFT is held in your Journament account, and you can withdraw it to your own wallet at any time.

5 SUSD one-off · no wallet required
Sign in to mint
Abstract
Abstract We fit the multi-band light curves of 2,205 Type Ia supernovae (SNe Ia) from the Zwicky Transient Facility DR2 with a one-zone radioactive decay model with a phenomenological addition to include Fe recombination physics. We find a strong correlation between inferred nickel mass and SALT2 stretch, which our simplified modelling links to longer diffusion times in more massive ejecta, offering a physical basis for the brighter-slower relation. SNe Ia in low-mass hosts (log10(M*/M⊙) < 10) produce ≈12% more 56Ni than those in high-mass hosts, linking the host-galaxy mass step to ejecta properties and hinting at metallicity or age-dependent burning efficiencies. A pseudo-bolometric comparison provides lower limits on the nickel masses, highlighting their sensitivity to SED-level assumptions. Injection-and-recovery tests with realistic ZTF sampling and the same model recover the nickel scale but show significant sensitivity to distance and opacity assumptions; individual-event point estimates are therefore model-dependent. Accounting for selection biases and broad individual-event posteriors, hierarchical modelling of 902 SNe (z ≤ 0.06) gives Gaussian population distributions with μej = 1.26 ± 0.01 M⊙ (σej = 0.33 ± 0.01 M⊙) and μNi = 0.64 ± 0.06 M⊙ (σNi = 0.42 ± 0.02 M⊙). This work provides a step towards physical characterization of the local SN Ia population while quantifying diversity and environmental dependencies relevant to progenitor physics and precision cosmology.
Reference Key
openalex_W7127596453 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Nikhil Sarin, Ellen Lindsjö, L Kelsey, Matthew Grayling, Jesper Sollerman, Steve Ray Schulze, Adam Miller, Madeleine Ginolin, Erin E. Hayesn, Conor Omand, Kaisey Mandel, Aaron Do, Suhail Dhawan, Joel Johansson
Are you one of these authors? Claim your profile
Journal monthly notices of the royal astronomical society
Year 2026
DOI
10.1093/mnras/stag1739
URL
https://doi.org/10.1093/mnras/stag1739
Keywords Keywords not found

Citations

No citations found. To add a citation, contact the admin at info@scimatic.org

Comments

No comments yet. Be the first to comment on this article.