{"doi":"10.3847/1538-4357/adce82","title":"COZMIC. III. Cosmological Zoom-in Simulations of Self-interacting Dark Matter with Suppressed Initial Conditions","abstract":"Abstract We present eight cosmological dark matter (DM)-only zoom-in simulations of a Milky Way–like system that include suppression of the linear matter power spectrum P ( k ), and/or velocity-dependent DM self-interactions, as the third installment of the COZMIC suite. We consider a model featuring a massive dark photon that mediates DM self-interactions and decays into massless dark fermions. The dark photon and dark fermions suppress linear matter perturbations, resulting in dark acoustic oscillations in P ( k ), which ultimately affect dwarf galaxy scales. The model also features a velocity-dependent elastic self-interaction between DM particles (SIDM), with a cross section that can alleviate small-scale structure anomalies. For the first time, our simulations test the impact of P ( k ) suppression on gravothermal evolution in an SIDM scenario that leads to core collapse in (sub)halos with present-day virial masses below ≈10 9 M ⊙ . In simulations with P ( k ) suppression and self-interactions, the lack of low-mass (sub)halos and the delayed growth of structure reduce the fraction of core-collapsed systems relative to SIDM simulations without P ( k ) suppression. In particular, P ( k ) suppression that saturates current warm DM constraints almost entirely erases core collapse in isolated halos. Models with less extreme P ( k ) suppression produce core collapse in ≈20% of subhalos and ≈5% of isolated halos above 10 8 M ⊙ , and also increase the abundance of extremely low-concentration isolated low-mass halos relative to SIDM. These results reveal a complex interplay between early and late-Universe DM physics, revealing new discovery scenarios in the context of upcoming small-scale structure measurements.","journal":"The Astrophysical Journal","year":2025,"id":538369,"datarank":0.0,"base_score":0.0,"endowment":0.0,"self_citation_contribution":0.0,"citation_network_contribution":0.0,"self_endowment_contribution":0.0,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":3,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":0.8832,"is_data_producer":false,"deposit_databanks":null,"is_oa":true,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":"2025-01-01","fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":1360900,"name":"Rui An","orcid":"0000-0001-9543-5012","position":1,"is_corresponding":false},{"id":1356360,"name":"Daneng Yang","orcid":"0000-0002-5421-3138","position":2,"is_corresponding":false},{"id":1366679,"name":"Hai-Bo Yu","orcid":"0000-0002-8421-8597","position":3,"is_corresponding":false},{"id":548607,"name":"Andrew Benson","orcid":"0000-0001-5501-6008","position":4,"is_corresponding":false},{"id":1360930,"name":"Vera Gluscevic","orcid":"0000-0002-3589-8637","position":5,"is_corresponding":false},{"id":1356361,"name":"Ethan O. Nadler","orcid":"0000-0002-1182-3825","position":0,"is_corresponding":true}],"reference_count":121,"raw_metadata":null,"created_at":"2026-07-19T02:52:21.389196Z","pmid":null,"pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}