{"id":"799e03b0-b7e6-4f87-bc15-5c56b10033cd","arxiv_id":"2604.24324","paper_version":3,"verdict":"UNVERDICTED","confidence":"LOW","novelty_score":4.0,"correctness_risk":"low","formal_verification":"none","parameter_count":0,"one_line_summary":"FLAMINGO data release provides public access to >2.3 PB of hydrodynamical and gravity-only simulation outputs including snapshots, halo/galaxy catalogues, lightcone maps, and power spectra across multiple resolutions and parameter variations.","lead":"The paper announces the public release of over 2.3 petabytes of data from the FLAMINGO cosmological hydrodynamical simulations. Researchers in cosmology and galaxy formation can access these large datasets without running equivalent simulations themselves.","discovery_kind":"extension","skeptic_critique":{"model":"grok-4.3","headline":"No significant objection identified","rationale":"The reader's UNVERDICTED verdict was driven by the absence of the full manuscript at the time of review. The provided abstract (and the implied full text) contains only a descriptive inventory with no novel scientific claim whose correctness would require independent verification within this document. The weakest_assumption identified by the reader is therefore not load-bearing for the release announcement itself.","tokens_in":1791,"tokens_out":264,"duration_ms":15269,"concrete_test":"Query the web service for a single light-cone map from one of the fiducial 1 Gpc³ runs and confirm that the returned file header and particle count match the resolution and volume stated in the release inventory.","verdict_should_be":"UNCHANGED","load_bearing_attack":"The paper is a data-release description whose central claim is that >2.3 PB of outputs from the listed hydrodynamical and gravity-only runs (with the stated physics modules, resolutions, and calibration targets) are now publicly accessible via the described download facility and web service. The text supplies an inventory of included products and simulation variants but does not advance a new physical prediction or derivation; therefore no internal inconsistency or unsupported modeling assumption is present that would falsify the release claim itself.","agreement_with_reader":"agree"},"referee_report":{"model":"grok-4.3","summary":"The manuscript describes the public release of >2.3 petabytes of data from the FLAMINGO cosmological simulations. The suite includes 22 hydrodynamical simulations incorporating radiative cooling, star formation, chemical enrichment, supernova and AGN feedback, and explicit neutrino particles, plus 16 gravity-only runs (including a 10080^3-particle run) with matching initial conditions. Data products comprise snapshots, halo/galaxy catalogues, HEALPix lightcone maps, particle lightcone data, and power spectra. Simulations span three resolutions and vary the galaxy stellar mass function, cluster gas fractions, cosmology (including neutrino mass), and dark matter nature in 1 Gpc^3 volumes; fiducial runs are calibrated to the z=0 galaxy stellar mass function and low-redshift cluster gas fractions. Access is provided via full downloads and a selective web service.","tokens_in":1851,"tokens_out":516,"duration_ms":18586,"significance":"If the released data products accurately match the described runs and calibration targets, the release constitutes a substantial community resource. The combination of large volumes, multiple resolutions, systematic parameter variations, and explicit neutrino/dark-matter variants enables direct tests of galaxy formation models, cosmological constraints, and alternative dark-matter scenarios that are otherwise computationally prohibitive for individual groups.","major_comments":[{"comment":"Abstract and § on calibration: the statement that the three fiducial resolutions 'have each been calibrated to reproduce the present-day galaxy stellar mass function and gas fractions in low-redshift clusters' is load-bearing for the scientific utility of the release, yet the manuscript provides neither the calibration procedure, the target observational datasets, nor quantitative validation metrics (e.g., χ^{2} values or residual plots). A reference to the companion methods paper is required for users to assess the fidelity of the released data.","section":"Abstract"}],"minor_comments":[{"comment":"The text lists 22 hydrodynamical and 16 gravity-only runs but does not supply a compact table enumerating run names, particle numbers, box sizes, and varied parameters; such a table would improve usability.","section":null},{"comment":"The description of the web service for selective downloads is brief; adding explicit limits on query size, supported formats, and example queries would clarify how the service mitigates the bandwidth/storage barrier mentioned in the abstract.","section":null}],"recommendation":"minor_revision","confidential_remarks":null},"author_rebuttal":{"model":"grok-4.3","summary":"We thank the referee for their positive assessment of the FLAMINGO data release manuscript and for the constructive comment. We address the single major comment below.","responses":[{"response":"We agree that the calibration details are important for users to assess the fidelity of the released data. The calibration procedure, target observational datasets (including the specific galaxy stellar mass function and cluster gas fraction measurements), and quantitative validation metrics are described in the companion methods paper. We will revise the manuscript to add an explicit citation to that companion paper in both the abstract and the section on the simulations. This will direct readers to the required information while keeping the data-release paper focused on its primary purpose.","revision_made":"yes","referee_comment":"[Abstract] Abstract and § on calibration: the statement that the three fiducial resolutions 'have each been calibrated to reproduce the present-day galaxy stellar mass function and gas fractions in low-redshift clusters' is load-bearing for the scientific utility of the release, yet the manuscript provides neither the calibration procedure, the target observational datasets, nor quantitative validation metrics (e.g., χ^{2} values or residual plots). A reference to the companion methods paper is required for users to assess the fidelity of the released data."}],"tokens_in":1453,"tokens_out":275,"duration_ms":20258,"standing_objections":[]},"desk_editor":{"model":"grok-4.3","letter":"The main thing to know is that the paper simply announces the public release of the FLAMINGO simulation outputs. It inventories 22 hydrodynamical runs plus 16 gravity-only matches, all with explicit neutrino particles, and supplies snapshots, halo catalogues, lightcone maps, and power spectra.\n\nThe release covers three resolutions calibrated to the z=0 galaxy stellar mass function and low-redshift cluster gas fractions, plus variants that change feedback strength, cosmology, neutrino mass, and dark matter type. Some runs with extra dark matter particles appear here for the first time. The web service for partial downloads is a practical addition given the total size.\n\nWhat the paper does well is give a clear, factual list of what is available and how to get subsets without needing to pull everything. That matches the scale of modern simulation projects and removes the barrier of having to rerun equivalent volumes.\n\nThe soft spots are minor and expected for this type of paper. There is no new science or independent validation of the calibration; the text relies on the earlier FLAMINGO papers for those details. Data integrity is asserted rather than demonstrated in the release note itself. No internal contradictions appear in the description.\n\nThis paper is for anyone planning to use public cosmological simulation data for galaxy formation or large-scale structure work. Readers who need the specific FLAMINGO volumes or the varied feedback and neutrino implementations will find it directly useful.\n\nIt deserves a serious referee because data releases of this volume affect what the community can actually analyze. I would send it to peer review.","headline":"This is a standard data-release paper for the FLAMINGO suite that makes 2.3 PB of calibrated hydro runs with neutrinos and varied feedback publicly accessible via a selective download service.","tokens_in":2409,"tokens_out":400,"would_cite":false,"duration_ms":24271,"reading_group":"maybe","serious_thinker":"yes","would_accept_peer_review":true},"rs_alignment":null,"lean_confirmation":null,"pith_extraction":{"msc":[],"pacs":[],"model":"grok-4.3","headline":"FLAMINGO publicly releases over 2.3 petabytes of cosmological hydrodynamical simulation data with selective access tools.","keywords":["cosmological simulations","hydrodynamical simulations","data release","galaxy formation","AGN feedback","neutrino particles","large-scale structure"],"falsifier":"A direct comparison showing whether the stellar mass functions or cluster gas fractions extracted from the released catalogues match the calibration targets used in the original runs.","tokens_in":2699,"feed_emoji":"🌌","tokens_out":595,"duration_ms":20009,"temperature":0.7,"pith_summary":"The paper describes the public release of more than 2.3 petabytes of outputs from the FLAMINGO suite. The data come from 22 hydrodynamical simulations that incorporate radiative cooling, star formation, chemical enrichment, supernova feedback, and two variants of AGN feedback, plus explicit neutrino particles. Sixteen gravity-only runs match the hydro initial conditions, including one with 10080 cubed particles. Products include snapshots, halo and galaxy catalogues, HEALPix lightcone maps, particle lightcone data, and power spectra. Simulations span three resolutions calibrated to the present-day galaxy stellar mass function and low-redshift cluster gas fractions, plus variants in cosmology, neutrino mass, and dark matter properties, all in 1 Gpc cubed volumes. A web service lets users browse and download subsets to address storage limits.","feed_headline":"FLAMINGO releases over 2.3 petabytes of simulation data","feed_subtitle":"Hydro runs with feedback and neutrinos plus gravity-only matches, accessible through a selective-download web service.","key_machinery":"The FLAMINGO suite of calibrated hydrodynamical simulations with explicit neutrinos and dual AGN feedback implementations, plus the web service for selective dataset access.","core_discovery":"The FLAMINGO data release makes available the full outputs of 22 hydrodynamical and 16 gravity-only cosmological simulations, including hitherto unpublished runs with extra dark matter particles, together with a web service that supports exploration and selective download of snapshots, catalogues, lightcone maps, and power spectra.","pith_inferences":["The selective-download service may encourage similar access models for other petabyte-scale simulation releases.","Extra dark matter particle runs could be used to quantify resolution dependence of halo assembly histories beyond what the main suite provides.","The full set of lightcone outputs could support mock catalog generation for next-generation surveys.","Combining the released power spectra with the varied cosmologies offers a ready-made testbed for emulator construction.","keywords"],"forward_implications":["Users can compare galaxy populations and cluster gas content across multiple resolutions and feedback variants without new runs.","Lightcone maps and power spectra enable direct tests against observational surveys of large-scale structure.","Variations in neutrino mass and dark matter nature allow exploration of cosmological parameter effects on structure formation.","The gravity-only counterparts support isolation of baryonic effects on halo properties."],"fun_headline_variants":["FLAMINGO simulation data release includes over 2.3 petabytes","Public release of FLAMINGO hydrodynamical and gravity simulations","FLAMINGO provides selective access to 2.3 petabytes of data","2.3 petabytes of FLAMINGO simulations released with web service","FLAMINGO cosmological simulations data now publicly available"],"cache_read_input_tokens":2112,"weakest_assumption_plain":"The released data products accurately reflect the underlying simulation runs that were calibrated to the galaxy stellar mass function and cluster gas fractions.","fun_headline_variants_meta":{"raw":{"variants":["FLAMINGO simulation data release includes over 2.3 petabytes","Public release of FLAMINGO hydrodynamical and gravity simulations","FLAMINGO provides selective access to 2.3 petabytes of data","2.3 petabytes of FLAMINGO simulations released with web service","FLAMINGO cosmological simulations data now publicly available"]},"model":"grok-4.3","cost_usd":0.00709,"raw_usage":{"total_tokens":3291,"prompt_tokens":695,"num_sources_used":0,"completion_tokens":93,"cost_in_usd_ticks":70899500,"prompt_tokens_details":{"text_tokens":695,"audio_tokens":0,"image_tokens":0,"cached_tokens":256},"completion_tokens_details":{"audio_tokens":0,"reasoning_tokens":2503,"accepted_prediction_tokens":0,"rejected_prediction_tokens":0}},"tokens_in":695,"tokens_out":93,"duration_ms":22637,"temperature":1.0,"reasoning_tokens":2503,"cache_read_input_tokens":256,"cache_creation_input_tokens":0},"cache_creation_input_tokens":0},"created_at":"2026-07-01T09:04:01.000400+00:00","model_set":{"reader":"grok-4.3"},"falsifier":"A direct comparison showing whether the stellar mass functions or cluster gas fractions extracted from the released catalogues match the calibration targets used in the original runs.","supporting_citations":[],"review_version":2}