Molecular analysis of a high-mass prestellar core candidate in W43-MM1
dc.contributor.author | MOLET, J. | |
dc.contributor.author | BROUILLET, N. | |
hal.structure.identifier | Institut de Planétologie et d'Astrophysique de Grenoble [IPAG] | |
dc.contributor.author | NONY, T. | |
hal.structure.identifier | Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique [LERMA (UMR_8112)] | |
hal.structure.identifier | Astrophysique | |
dc.contributor.author | GUSDORF, Antoine | |
hal.structure.identifier | Institut de Planétologie et d'Astrophysique de Grenoble [IPAG] | |
hal.structure.identifier | Commissariat à l'énergie atomique et aux énergies alternatives [CEA] | |
dc.contributor.author | MOTTE, F. | |
dc.contributor.author | DESPOIS, D. | |
hal.structure.identifier | Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)] | |
dc.contributor.author | LOUVET, F. | |
dc.contributor.author | BONTEMPS, Sylvain | |
dc.contributor.author | HERPIN, Fabrice | |
dc.date.issued | 2019 | |
dc.identifier.issn | 0004-6361 | |
dc.description.abstractEn | Context. High-mass analogues of low-mass prestellar cores are searched for to constrain the models of high-mass star formation. Several high-mass cores, at various evolutionary stages, have been recently identified towards the massive star-forming region W43-MM1 and amongst them a high-mass prestellar core candidate.Aims. We aim to characterise the chemistry in this high-mass prestellar core candidate, referred to as W43-MM1 core #6, and its environment.Methods. Using ALMA high-spatial resolution data of W43-MM1, we have studied the molecular content of core #6 and a neighbouring high-mass protostellar core, referred to as #3, which is similar in size and mass to core #6. We first subtracted the continuum emission using a method based on the density distribution of the intensities on each pixel. Then, from the distribution of detected molecules, we identified the molecules centred on the prestellar core candidate (core #6) and those associated to shocks related to outflows and filament formation. Then we constrained the column densities and temperatures of the molecules detected towards the two cores.Results. While core #3 appears to contain a hot core with a temperature of about 190 K, core #6 seems to have a lower temperature in the range from 20 to 90 K from a rotational diagram analysis. We have considered different source sizes for core #6 and the comparison of the abundances of the detected molecules towards the core with various interstellar sources shows that it is compatible with a core of size 1000 au with T = 20−90 K or a core of size 500 au with T ~ 80 K.Conclusions. Core #6 of W43-MM1 remains one of the best high-mass prestellar core candidates even if we cannot exclude that it is at the very beginning of the protostellar phase of high-mass star formation. | |
dc.language.iso | en | |
dc.publisher | EDP Sciences | |
dc.subject.en | stars: formation | |
dc.subject.en | stars: massive | |
dc.subject.en | ISM: abundances | |
dc.subject.en | ISM: molecules | |
dc.subject.en | radio lines: ISM | |
dc.title.en | Molecular analysis of a high-mass prestellar core candidate in W43-MM1 | |
dc.type | Article de revue | |
dc.identifier.doi | 10.1051/0004-6361/201935497 | |
dc.subject.hal | Planète et Univers [physics]/Astrophysique [astro-ph]/Astrophysique stellaire et solaire [astro-ph.SR] | |
dc.identifier.arxiv | 1905.12463 | |
bordeaux.journal | Astronomy and Astrophysics - A&A | |
bordeaux.page | A132 | |
bordeaux.volume | 626 | |
bordeaux.peerReviewed | oui | |
hal.identifier | hal-02144700 | |
hal.version | 1 | |
hal.popular | non | |
hal.audience | Internationale | |
hal.origin.link | https://hal.archives-ouvertes.fr//hal-02144700v1 | |
bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Astronomy%20and%20Astrophysics%20-%20A&A&rft.date=2019&rft.volume=626&rft.spage=A132&rft.epage=A132&rft.eissn=0004-6361&rft.issn=0004-6361&rft.au=MOLET,%20J.&BROUILLET,%20N.&NONY,%20T.&GUSDORF,%20Antoine&MOTTE,%20F.&rft.genre=article |
Files in this item
Files | Size | Format | View |
---|---|---|---|
There are no files associated with this item. |