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Grain growth and its chemical impact in the first hydrostatic core phase

hal.structure.identifierAstrophysique Interprétation Modélisation [AIM (UMR_7158 / UMR_E_9005 / UM_112)]
dc.contributor.authorNAVARRO-ALMAIDA, D.
hal.structure.identifierAstrophysique Interprétation Modélisation [AIM (UMR_7158 / UMR_E_9005 / UM_112)]
dc.contributor.authorLEBREUILLY, U.
hal.structure.identifierAstrophysique Interprétation Modélisation [AIM (UMR_7158 / UMR_E_9005 / UM_112)]
dc.contributor.authorHENNEBELLE, P.
hal.structure.identifierCentro de Astrobiología, Consejo Superior de Investigaciones Científicas (CSIC)/Instituto Nacional de Técnica Aeroespacial (INTA) [CAB]
dc.contributor.authorFUENTE, A.
hal.structure.identifierCentre de Recherche Astrophysique de Lyon [CRAL]
dc.contributor.authorCOMMERÇON, B.
hal.structure.identifierInstitut de Planétologie et d'Astrophysique de Grenoble [IPAG]
dc.contributor.authorLE GAL, R.
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorWAKELAM, V.
hal.structure.identifierLaboratoire d'Etude du Rayonnement et de la Matière en Astrophysique et Atmosphères = Laboratory for Studies of Radiation and Matter in Astrophysics and Atmospheres [LERMA]
dc.contributor.authorGERIN, M.
hal.structure.identifierOAN, Madrid
dc.contributor.authorRIVIÉRE-MARICHALAR, P.
hal.structure.identifierUniversidad Complutense de Madrid = Complutense University of Madrid [Madrid] [UCM]
dc.contributor.authorBEITIA-ANTERO, L.
hal.structure.identifierUniversidad Autónoma de Madrid [UAM]
dc.contributor.authorASCASIBAR, Y.
dc.date.issued2024
dc.identifier.issn0004-6361
dc.description.abstractEnContext. The first hydrostatic core (FHSC) phase is a brief stage in the protostellar evolution that is difficult to detect. Its chemical composition determine that of later evolutionary stages. Numerical simulations are the tool of choice to study these objects.Aims. Our goal is to characterize the chemical evolution of gas and dust during the formation of the FHSC. Moreover, we are interested in analyzing, for the first time with 3D magnetohydrodynamic (MHD) simulations, the role of grain growth in its chemistry.Methods. We postprocessed 2 × 105 tracer particles from a RAMSES non-ideal MHD simulation using the codes NAUTILUS and SHARK to follow the chemistry and grain growth throughout the simulation.Results. Gas-phase abundances of most of the C, O, N, and S reservoirs in the hot corino at the end of the simulation match the ice-phase abundances from the prestellar phase. Interstellar complex organic molecules such as methyl formate, acetaldehyde, and formamide are formed during the warm-up process. Grain size in the hot corino (nH > 1011 cm−3) increases forty-fold during the last 30 kyr, with negligible effects on its chemical composition. At moderate densities (1010 < nH < 1011 cm−3) and cool temperatures 15 < T < 50 K, increasing grain sizes delay molecular depletion. At low densities (nH ~ 107 cm−3), grains do not grow significantly. To assess the need to perform chemo-MHD calculations, we compared our results with a two-step model that reproduces well the abundances of C and O reservoirs, but not the N and S reservoirs.Conclusions. The chemical composition of the FHSC is heavily determined by that of the parent prestellar core. Chemo-MHD computations are needed for an accurate prediction of the abundances of the main N and S elemental reservoirs. The impact of grain growth in moderately dense areas delaying depletion permits the use of abundance ratios as grain growth proxies.
dc.description.sponsorshipProcessus de formation planétaire pendant l'assemblage de la nébuleuse solaire - ANR-20-CE49-0006
dc.language.isoen
dc.publisherEDP Sciences
dc.subject.enISM: abundances
dc.subject.endust, extinction
dc.subject.enastrochemistry
dc.subject.enmethods: numerical
dc.subject.enstars: evolution
dc.subject.enstars: formation
dc.title.enGrain growth and its chemical impact in the first hydrostatic core phase
dc.typeArticle de revue
dc.identifier.doi10.1051/0004-6361/202347847
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]
dc.description.sponsorshipEuropeUnderstanding our Galactic ecosystem: From the disk of the Milky Way to the formation sites of stars and planets
bordeaux.journalAstronomy and Astrophysics - A&A
bordeaux.pageA112
bordeaux.volume685
bordeaux.peerReviewedoui
hal.identifiercea-04577065
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//cea-04577065v1
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