CRIMSONS: An Online Tool for Modeling Chemical Enrichment with Stochastic IMF Sampling

@misc{rossi2026crimsons,
  title = {{CRIMSONS: An Online Tool for Modeling Chemical Enrichment with Stochastic IMF Sampling}},
  author = {Martina Rossi and Lapo Querci and Stefano Ciabattini and Stefania Salvadori and Irene Vanni and Davide Massari and Edoardo Ceccarelli and Donatella Romano and Viola Gelli and Raffaele Pascale and Alice Mori and Elka Rusta and Ioanna Koutsouridou and Ása Skúladóttir and Laura Magrini and Riano Giribaldi and Jose Schiappacasse-Ulloa},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.25200},
  eprint = {2609.25200},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.25200},
  note = {CC BY 4.0},
}

TY  - UNPB
TI  - CRIMSONS: An Online Tool for Modeling Chemical Enrichment with Stochastic IMF Sampling
AU  - Martina Rossi
AU  - Lapo Querci
AU  - Stefano Ciabattini
AU  - Stefania Salvadori
AU  - Irene Vanni
AU  - Davide Massari
AU  - Edoardo Ceccarelli
AU  - Donatella Romano
AU  - Viola Gelli
AU  - Raffaele Pascale
AU  - Alice Mori
AU  - Elka Rusta
AU  - Ioanna Koutsouridou
AU  - Ása Skúladóttir
AU  - Laura Magrini
AU  - Riano Giribaldi
AU  - Jose Schiappacasse-Ulloa
PY  - 2026
DA  - 2026/09/21
PB  - arXiv
DO  - 10.48550/arxiv.2609.25200
UR  - https://arxiv.org/abs/2609.25200
AB  - Chemical enrichment is a universal process shaped by several interconnected factors, including stellar feedback, the nature of chemical polluters, and the underlying distribution of stellar masses. Three key ingredients are often difficult to treat simultaneously in chemical-evolution models: the stochastic sampling of the stellar IMF, uncertainties in stellar nucleosynthesis yields, and pre-enrichment from primordial PopIII stars. In low star-formation rate environments, incomplete IMF sampling makes enrichment sensitive to the random presence or absence of massive supernova progenitors. Here, we present CRIMSONS, the first online tool designed to model chemical enrichment while self-consistently incorporating these three ingredients. The framework allows users to explore different IMFs, stellar population masses and metallicities, and multiple stellar yield sets. It follows the evolution of individual stars and tracks 30 elements(H-Zn), including contributions from SN, AGB stars, and TypeIa SNe. The current implementation adopts a closed-box framework, neglecting gas flows and spatial mixing, thus providing a controlled setup to isolate the effects of IMF sampling, stellar yields, and PopIII pre-enrichment. With CRIMSONS, we show that incomplete IMF sampling produces large abundance scatter, particularly in low-mass stellar populations. Different yield prescriptions introduce element-dependent variations, while some abundance ratios remain comparatively robust across models. Finally, comparison between models including primordial enrichment and those adopting only a metallicity floor shows that PopIII pre-enrichment can significantly affect subsequent chemical evolution. CRIMSONS therefore provides a controlled framework for quantifying the relative impact of stochastic IMF sampling, nucleosynthetic uncertainties, and primordial pre-enrichment on predicted abundance patterns
ER  -