Afficher la notice abrégée

ALMA-IMF. XIV. Free–Free Templates Derived from H41α and Ionized Gas Content in 15 Massive Protoclusters

hal.structure.identifierInstituto de Radioastronomía y Astrofísica, Universidad Nacional Autónoma de México, Morelia, Michoacán 58089, México
dc.contributor.authorGALVÁN-MADRID, Roberto
hal.structure.identifierInstituto de Radioastronomía y Astrofísica, Universidad Nacional Autónoma de México, Morelia, Michoacán 58089, México
dc.contributor.authorDÍAZ-GONZÁLEZ, Daniel
hal.structure.identifierInstitut de Planétologie et d'Astrophysique de Grenoble [IPAG]
dc.contributor.authorMOTTE, Frédérique
hal.structure.identifierDepartment of Astronomy, University of Florida, PO Box 112055, USA
dc.contributor.authorGINSBURG, Adam
hal.structure.identifierSKA Observatory, Jodrell Bank, Lower Withington, Maccles eld SK11 9FT, UK
dc.contributor.authorCUNNINGHAM, Nichol
hal.structure.identifierMax-Planck-Institut für Radioastronomie [MPIFR]
dc.contributor.authorMENTEN, Karl
hal.structure.identifierLaboratoire de physique de l'ENS - ENS Paris [LPENS]
dc.contributor.authorARMANTE, Mélanie
hal.structure.identifierDepartments of Astronomy and Chemistry, University of Virginia, Charlottesville, VA 22904, USA
dc.contributor.authorBONFAND, Mélisse
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorBRAINE, Jonathan
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorCSENGERI, Timea
hal.structure.identifierLaboratoire de physique de l'ENS - ENS Paris [LPENS]
dc.contributor.authorDELL’OVA, Pierre
hal.structure.identifierInstitut de Planétologie et d'Astrophysique de Grenoble [IPAG]
dc.contributor.authorLOUVET, Fabien
hal.structure.identifierInstituto de Radioastronomía y Astrofísica, Universidad Nacional Autónoma de México, Morelia, Michoacán 58089, México
dc.contributor.authorNONY, Thomas
hal.structure.identifierInstituto de Radioastronomía y Astrofísica, Universidad Nacional Autónoma de México, Morelia, Michoacán 58089, México
dc.contributor.authorRIVERA-SOTO, Rudy
hal.structure.identifierNational Astronomical Observatory of Japan, National Institutes of Natural Sciences, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
dc.contributor.authorSANHUEZA, Patricio
hal.structure.identifierDepartamento de Astronomía, Universidad de Concepción, Casilla 160-C, 4030000 Concepción, Chile
dc.contributor.authorSTUTZ, Amelia
hal.structure.identifierMax-Planck-Institut für Radioastronomie [MPIFR]
dc.contributor.authorWYROWSKI, Friedrich
hal.structure.identifierDepartamento de Astronomía, Universidad de Concepción, Casilla 160-C, 4030000 Concepción, Chile
dc.contributor.authorÁLVAREZ-GUTIÉRREZ, Rodrigo
hal.structure.identifierS. N. Bose National Centre for Basic Sciences, Sector-III, Salt Lake, Kolkata 700106, India
dc.contributor.authorBAUG, Tapas
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorBONTEMPS, Sylvain
hal.structure.identifierDepartamento de Astronomía, Universidad de Chile, Las Condes, 7591245 Santiago, Chile
dc.contributor.authorBRONFMAN, Leonardo
hal.structure.identifierInstituto Argentino de Radioastronomía (CCT-La Plata, CONICET; CICPBA), C.C. No. 5, 1894, Villa Elisa, Buenos Aires, Argentina
dc.contributor.authorFERNÁNDEZ-LÓPEZ, Manuel
hal.structure.identifierLaboratoire de physique de l'ENS - ENS Paris [LPENS]
dc.contributor.authorGUSDORF, Antoine
hal.structure.identifierDepartamento de Astronomía, Universidad de Concepción, Casilla 160-C, 4030000 Concepción, Chile
dc.contributor.authorKOLEY, Atanu
dc.contributor.authorLIU, Hong-Li
hal.structure.identifierDepartamento de Astronomía, Universidad de Concepción, Casilla 160-C, 4030000 Concepción, Chile
dc.contributor.authorSALINAS, Javiera
hal.structure.identifierUniversity of Arizona Department of Astronomy and Steward Observatory, 933 North Cherry Avenue, Tucson, AZ 85721, USA
dc.contributor.authorTOWNER, Allison
hal.structure.identifierSchool of Physics and Astronomy, Cardiff University, Cardiff CF24 3AA, UK
dc.contributor.authorWHITWORTH, Anthony
dc.date.issued2024-09-04
dc.description.abstractEnAbstract We use the H41 α recombination line to create templates of the millimeter free–free emission in the ALMA-IMF continuum maps, which allows us to separate it from dust emission. This method complements spectral-index information and extrapolation from centimeter-wavelength maps. We use the derived maps to estimate the properties of up to 34 H ii regions across the ALMA-IMF protoclusters. The hydrogen ionizing photon rate Q 0 and spectral types follow the evolutionary trend proposed by Motte et al. The youngest protoclusters lack detectable ionized gas, followed by protoclusters with increasing numbers of OB stars. The total Q 0 increases from ∼10 45 s −1 to >10 49 s −1 . We used the adjacent He41 α line to measure the relative number abundances of helium, finding values consistent with the Galactic interstellar medium, although a few outliers are discussed. A search for sites of maser amplification of the H41 α line returned negative results. We looked for possible correlations between the electron densities, emission measures, and Q 0 with H ii region size D . The latter is the best correlated, with Q 0 ∝ D 2.49 ± 0.18 . This favors interpretations in which smaller ultracompact H ii regions are not necessarily the less dynamically evolved versions of larger ones but rather are ionized by less massive stars. Moderate correlations were found between the dynamical width Δ V dyn with D and Q 0 . Δ V dyn increases from about 1 to 2 times the ionized-gas sound speed. Finally, an outlier H ii region south of W43-MM2 is discussed. We suggest that this source could harbor an embedded stellar or disk wind.
dc.language.isoen
dc.publisherIOPscience
dc.rights.urihttp://creativecommons.org/licenses/by/
dc.title.enALMA-IMF. XIV. Free–Free Templates Derived from H41α and Ionized Gas Content in 15 Massive Protoclusters
dc.typeArticle de revue
dc.identifier.doi10.3847/1538-4365/ad61e6
dc.subject.halPlanète et Univers [physics]
bordeaux.journalThe Astrophysical Journal Supplement Series
bordeaux.page15
bordeaux.volume274
bordeaux.issue1
bordeaux.peerReviewedoui
hal.identifierhal-04780165
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-04780165v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=The%20Astrophysical%20Journal%20Supplement%20Series&rft.date=2024-09-04&rft.volume=274&rft.issue=1&rft.spage=15&rft.epage=15&rft.au=GALV%C3%81N-MADRID,%20Roberto&D%C3%8DAZ-GONZ%C3%81LEZ,%20Daniel&MOTTE,%20Fr%C3%A9d%C3%A9rique&GINSBURG,%20Adam&CUNNINGHAM,%20Nichol&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