{"status":"OK","data":{"id":679773,"identifier":"VFKWLJ","persistentUrl":"https://doi.org/10.34894/VFKWLJ","protocol":"doi","authority":"10.34894","separator":"/","publisher":"DataverseNL","publicationDate":"2026-09-24","storageIdentifier":"surf://10.34894/VFKWLJ","effectiveDatasetFileCountLimit":10000,"datasetFileUploadsAvailable":9999,"datasetType":"dataset","locks":[],"latestVersion":{"id":35421,"datasetId":679773,"datasetPersistentId":"doi:10.34894/VFKWLJ","datasetType":"dataset","storageIdentifier":"surf://10.34894/VFKWLJ","versionNumber":1,"internalVersionNumber":7,"versionMinorNumber":0,"versionState":"RELEASED","latestVersionPublishingState":"RELEASED","lastUpdateTime":"2026-09-24T21:02:32Z","releaseTime":"2026-09-24T21:02:32Z","createTime":"2026-09-24T00:15:01Z","publicationDate":"2026-09-24","citationDate":"2026-09-24","effectiveDatasetFileCountLimit":10000,"datasetFileUploadsAvailable":9999,"license":{"name":"CC-BY-4.0","uri":"http://creativecommons.org/licenses/by/4.0","iconUri":"https://i.creativecommons.org/l/by/4.0/88x31.png"},"fileAccessRequest":true,"metadataBlocks":{"citation":{"displayName":"Citation Metadata","name":"citation","fields":[{"typeName":"title","multiple":false,"typeClass":"primitive","value":"Chabrier+2019/2021 hydrogen and helium EOS tables in PALEOS format for PROTEUS"},{"typeName":"author","multiple":true,"typeClass":"compound","value":[{"authorName":{"typeName":"authorName","multiple":false,"typeClass":"primitive","value":"Lichtenberg, Tim"},"authorAffiliation":{"typeName":"authorAffiliation","multiple":false,"typeClass":"primitive","value":"University of Groningen"}}]},{"typeName":"datasetContact","multiple":true,"typeClass":"compound","value":[{"datasetContactName":{"typeName":"datasetContactName","multiple":false,"typeClass":"primitive","value":"PROTEUS Framework"}}]},{"typeName":"dsDescription","multiple":true,"typeClass":"compound","value":[{"dsDescriptionValue":{"typeName":"dsDescriptionValue","multiple":false,"typeClass":"primitive","value":"<p>Hydrogen, helium, and hydrogen-helium mixture equation of state (EOS) tables converted to the PALEOS column format used by the PROTEUS planetary evolution framework. The original EOS data are from Chabrier, Mazevet &amp; Soubiran (2019, ApJ 872, 51) and Chabrier &amp; Debras (2021, ApJ 917, 4), available at http://perso.ens-lyon.fr/gilles.chabrier/DirEOS/DirEOS2021</p>\n<p>Each table provides pressure, temperature, density, internal energy, entropy, heat capacity at constant pressure (cp), heat capacity at constant volume (cv), thermal expansivity (alpha), and the adiabatic&nbsp;gradient (nabla_ad) on a regular grid in log10(P) and log10(T). The tables cover temperatures from 100 to 10^8 K, pressures from 1 Pa to 10^22 Pa, spanning the full range from giant planet envelopes to stellar interiors.</p>\n<p>Converted tables (PALEOS format, used by Zalmoxis and SPIDER):<br>- chabrier2021_H.dat: Pure hydrogen<br>- chabrier2021_HE.dat: Pure helium<br>- chabrier2021_HHe_Y0275.dat: H/He mixture, Y = 0.275 (protosolar)<br>- chabrier2021_HHe_Y0292.dat: H/He mixture, Y = 0.292 (DUSTY/COND models)<br>- chabrier2021_HHe_Y0297.dat: H/He mixture, Y = 0.297 (BHAC2015 models)</p>\n<p>Original tables from Chabrier are included in the original_tables/ subdirectory for reproducibility.</p>\n<p>Columns directly from the Chabrier tables: P, T, rho, u, s, nabla_ad. Derived columns: cp (from nabla_ad and alpha), cv (from the Mayer relation), alpha (from the logarithmic density derivative). Full derivation details and reliability assessment are documented in the conversion script available in Zalmoxis/src/tools.</p>\n<p>Known limitations:<br>- cp is unreliable in the H2 dissociation zone (T ~ 3000-30000 K, &nbsp; P ~ 0.1-1000 GPa) where nabla_ad is clamped at 0.100 in the &nbsp; original tables. These points are flagged as phase_id = \"dissociating\".<br>- cv may be numerically unreliable near phase transitions due to cancellation in the Mayer relation. Flagged points have<br>&nbsp; \":cv_unreliable\" appended to the phase_id column.</p>\n<p>The \"effective\" hydrogen table (TABLE_H_TP_effective) is included in not_used_in_zalmoxis/ but must NOT be used as a standalone pure H EOS. It is designed only for computing H/He mixtures beyond the ideal volume law, following Eqs. 8-11 of Chabrier et al. (2019).</p>"}},{"dsDescriptionValue":{"typeName":"dsDescriptionValue","multiple":false,"typeClass":"primitive","value":"Mirror of Zenodo deposit 10.5281/zenodo.19135021. Zenodo is the primary source."}}]},{"typeName":"subject","multiple":true,"typeClass":"controlledVocabulary","value":["Astronomy and Astrophysics"]}]},"dansDataVaultMetadata":{"displayName":"Data Vault Metadata","name":"dansDataVaultMetadata","fields":[{"typeName":"dansDataversePid","multiple":false,"typeClass":"primitive","value":"doi:10.34894/VFKWLJ"},{"typeName":"dansDataversePidVersion","multiple":false,"typeClass":"primitive","value":"1.0"},{"typeName":"dansBagId","multiple":false,"typeClass":"primitive","value":"urn:uuid:bef770c3-4816-4100-abc8-63dcb46600f2"},{"typeName":"dansNbn","multiple":false,"typeClass":"primitive","value":"urn:nbn:nl:ui:13-3b1c377b-4a14-4cab-88d5-327b1cee7ff8"}]}},"files":[{"description":"","label":"EOS_Chabrier2021_HHe.tar.gz","restricted":false,"version":1,"datasetVersionId":35421,"dataFile":{"id":679774,"persistentId":"","filename":"EOS_Chabrier2021_HHe.tar.gz","contentType":"application/gzip","friendlyType":"Gzip Archive","filesize":22747679,"description":"","storageIdentifier":"surf://store:1a0d0c40d40-88d847d07d76","rootDataFileId":-1,"checksum":{"type":"SHA-1","value":"6d28c42c6bdd1ff1f9a7c014a6c65a0c1c55d39c"},"tabularData":false,"creationDate":"2026-09-24","publicationDate":"2026-09-24","lastUpdateTime":"2026-09-24T21:02:32Z","fileAccessRequest":true}}]}}}