Afficher la notice abrégée

ALMA-IMF. III. Investigating the origin of stellar masses: top-heavy core mass function in the W43-MM2&MM3 mini-starburst

hal.structure.identifierInstitut de Planétologie et d'Astrophysique de Grenoble [IPAG]
dc.contributor.authorPOUTEAU, Yohan
hal.structure.identifierInstitut de Planétologie et d'Astrophysique de Grenoble [IPAG]
dc.contributor.authorMOTTE, Frédérique
hal.structure.identifierInstituto de Radioastronomía y Astrofísica [Mexico] [IRyA]
dc.contributor.authorNONY, Thomas
hal.structure.identifierInstituto de Radioastronomía y Astrofísica [Mexico] [IRyA]
dc.contributor.authorGALVÁN-MADRID, Roberto
hal.structure.identifierAstrophysique Interprétation Modélisation [AIM (UMR_7158 / UMR_E_9005 / UM_112)]
hal.structure.identifierInstitut de Recherches sur les lois Fondamentales de l'Univers [IRFU]
dc.contributor.authorMEN’SHCHIKOV, Alexander
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorBONTEMPS, Sylvain
hal.structure.identifierInstitut de Planétologie et d'Astrophysique de Grenoble [IPAG]
dc.contributor.authorROBITAILLE, Jean-François
hal.structure.identifierUniversidad de Chile = University of Chile [Santiago] [UCHILE]
hal.structure.identifierInstitut de Planétologie et d'Astrophysique de Grenoble [IPAG]
dc.contributor.authorLOUVET, Fabien
hal.structure.identifierUniversity of Florida [Gainesville] [UF]
dc.contributor.authorGINSBURG, Adam
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorHERPIN, Fabrice
hal.structure.identifierInstitut de Planétologie et d'Astrophysique de Grenoble [IPAG]
hal.structure.identifierInstitut de RadioAstronomie Millimétrique [IRAM]
dc.contributor.authorLÓPEZ-SEPULCRE, Ana
hal.structure.identifierAstrophysique
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.authorDELL'OVA, Pierre
hal.structure.identifierAstrophysique
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.authorGUSDORF, Antoine
hal.structure.identifierNational Astronomical Observatory of Japan [NAOJ]
hal.structure.identifierGraduate University for Advanced Studies [Hayama] [SOKENDAI]
dc.contributor.authorSANHUEZA, Patricio
hal.structure.identifierUniversidad de Concepción = University of Concepción [Chile] [UdeC]
hal.structure.identifierMax Planck Institute for Astronomy [MPIA]
dc.contributor.authorSTUTZ, Amelia
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorBROUILLET, Nathalie
hal.structure.identifierInstitut de Planétologie et d'Astrophysique de Grenoble [IPAG]
dc.contributor.authorTHOMASSON, Benjamin
hal.structure.identifierAstrophysique
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.authorARMANTE, Mélanie
hal.structure.identifierS. N. Bose National Centre for Basic Sciences
dc.contributor.authorBAUG, Tapas
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorBONFAND, Melisse
hal.structure.identifierInstitut de Ciencies del Cosmos [ICCUB]
hal.structure.identifierInstitut de Planétologie et d'Astrophysique de Grenoble [IPAG]
dc.contributor.authorBUSQUET, Gemma
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorCSENGERI, Timéa
hal.structure.identifierInstitut de Planétologie et d'Astrophysique de Grenoble [IPAG]
dc.contributor.authorCUNNINGHAM, Nichol
hal.structure.identifierInstituto Argentino de Radioastronomia [IAR]
dc.contributor.authorFERNÁNDEZ-LÓPEZ, Manuel
hal.structure.identifierUniversidad de Concepción = University of Concepción [Chile] [UdeC]
hal.structure.identifierYunnan University
dc.contributor.authorLIU, Hong-Li
hal.structure.identifierNational Tsing Hua University [Hsinchu] [NTHU]
dc.contributor.authorOLGUIN, Fernando
hal.structure.identifierUniversity of Florida [Gainesville] [UF]
dc.contributor.authorTOWNER, Allison
hal.structure.identifierDepartment of Astrophysical and Planetary Sciences [Boulder]
dc.contributor.authorBALLY, John
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorBRAINE, Jonathan
hal.structure.identifierUniversidad de Chile = University of Chile [Santiago] [UCHILE]
dc.contributor.authorBRONFMAN, Leonardo
hal.structure.identifierInstitut de Planétologie et d'Astrophysique de Grenoble [IPAG]
dc.contributor.authorJONCOUR, Isabelle
hal.structure.identifierInstitut de Planétologie et d'Astrophysique de Grenoble [IPAG]
hal.structure.identifierUniversitat de València = University of Valencia [UV]
dc.contributor.authorGONZÁLEZ, Marta
hal.structure.identifierAstrophysique Interprétation Modélisation [AIM (UMR_7158 / UMR_E_9005 / UM_112)]
hal.structure.identifierInstitut de Recherches sur les lois Fondamentales de l'Univers [IRFU]
dc.contributor.authorHENNEBELLE, Patrick
hal.structure.identifierShanghai Astronomical Observatory [Shanghai] [SHAO]
dc.contributor.authorLU, Xing
hal.structure.identifierMax Planck Institute for Radio Astronomy
dc.contributor.authorMENTEN, Karl
hal.structure.identifierInstitut de Planétologie et d'Astrophysique de Grenoble [IPAG]
dc.contributor.authorMORAUX, Estelle
hal.structure.identifierNational Astronomical Observatory of Japan [NAOJ]
hal.structure.identifierGraduate University for Advanced Studies [Hayama] [SOKENDAI]
dc.contributor.authorTATEMATSU, Ken'Ichi
hal.structure.identifierUniversity of Connecticut [UCONN]
dc.contributor.authorWALKER, Daniel
hal.structure.identifierSchool of Physics and Astronomy [Cardiff]
dc.contributor.authorWHITWORTH, Anthony
dc.date.issued2022
dc.identifier.issn0004-6361
dc.description.abstractEnAims. The processes that determine the stellar initial mass function (IMF) and its origin are critical unsolved problems, with profound implications for many areas of astrophysics. The W43-MM2&MM3 mini-starburst ridge hosts a rich young protocluster, from which it is possible to test the current paradigm on the IMF origin.Methods. The ALMA-IMF Large Program observed the W43-MM2&MM3 ridge, whose 1.3 mm and 3 mm ALMA 12 m array continuum images reach a ~2500 au spatial resolution. We used both the best-sensitivity and the line-free ALMA-IMF images, reduced the noise with the multi-resolution segmentation technique MnGSeg, and derived the most complete and most robust core catalog possible. Using two different extraction software packages, getsf and GExt2D, we identified ~200 compact sources, whose ~100 common sources have, on average, fluxes consistent to within 30%. We filtered sources with non-negligible free-free contamination and corrected fluxes from line contamination, resulting in a W43-MM2&MM3 catalog of 205 getsf cores. With a median deconvolved FWHM size of 3400 au, core masses range from ~0.1 M⊙ to ~70 M⊙ and the getsf catalog is 90% complete down to 0.8 M⊙. Results. The high-mass end of the core mass function (CMF) of W43-MM2&MM3 is top-heavy compared to the canonical IMF. Fitting the cumulative CMF with a single power-law of the form N(> log M) ∝ Mα, we measured α = −0.95 ± 0.04, compared to the canonical α = −1.35 Salpeter IMF slope. The slope of the CMF is robust with respect to map processing, extraction software packages, and reasonable variations in the assumptions taken to estimate core masses. We explore several assumptions on how cores transfer their mass to stars (assuming a mass conversion efficiency) and subfragment (defining a core fragment mass function) to predict the IMF resulting from the W43-MM2&MM3 CMF. While core mass growth should flatten the high-mass end of the resulting IMF, core fragmentation could steepen it.Conclusions. In stark contrast to the commonly accepted paradigm, our result argues against the universality of the CMF shape. More robust functions of the star formation efficiency and core subfragmentation are required to better predict the resulting IMF, here suggested to remain top-heavy at the end of the star formation phase. If confirmed, the IMFs emerging from starburst events could inherit their top-heavy shape from their parental CMFs, challenging the IMF universality.
dc.description.sponsorshipGENeration et Evolution des Structures du milieu InterStellaire - ANR-16-CE92-0035
dc.description.sponsorshipL'origine de la masse des étoiles dans des nuages hiérarchiques en effondrement - ANR-20-CE31-0009
dc.language.isoen
dc.publisherEDP Sciences
dc.subject.enstars: formation
dc.subject.enstars: massive
dc.subject.enISM: clouds
dc.subject.ensubmillimeter: ISM
dc.subject.endust
dc.subject.enextinction
dc.subject.enstars: luminosity function
dc.subject.enmass function
dc.title.enALMA-IMF. III. Investigating the origin of stellar masses: top-heavy core mass function in the W43-MM2&MM3 mini-starburst
dc.typeArticle de revue
dc.identifier.doi10.1051/0004-6361/202142951
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]
bordeaux.journalAstronomy and Astrophysics - A&A
bordeaux.pageA26
bordeaux.volume664
bordeaux.peerReviewedoui
hal.identifierhal-03746157
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03746157v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Astronomy%20and%20Astrophysics%20-%20A&A&rft.date=2022&rft.volume=664&rft.spage=A26&rft.epage=A26&rft.eissn=0004-6361&rft.issn=0004-6361&rft.au=POUTEAU,%20Yohan&MOTTE,%20Fr%C3%A9d%C3%A9rique&NONY,%20Thomas&GALV%C3%81N-MADRID,%20Roberto&MEN%E2%80%99SHCHIKOV,%20Alexander&rft.genre=article


Fichier(s) constituant ce document

FichiersTailleFormatVue

Il n'y a pas de fichiers associés à ce document.

Ce document figure dans la(les) collection(s) suivante(s)

Afficher la notice abrégée