Russeil, D., Figueira, M., Zavagno, A., Motte, F., Schneider, N., Men'shchikov, A., Bontemps, S., Andre, P., Anderson, L. D., Benedettini, M., Didelon, P., Di Francesco, J., Elia, D., Konyves, V., Luong, Q. Nguyen, Nony, T., Pezzuto, S., Rygl, K. L. J., Schisano, E., Spinoglio, L., Tige, J. and White, G. J. (2019). Herschel-HOBYS study of the earliest phases of high-mass star formation in NGC 6357. Astron. Astrophys., 625. LES ULIS CEDEX A: EDP SCIENCES S A. ISSN 1432-0746

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Abstract

Aims. To constrain models of high-mass star formation it is important to identify the massive dense cores (MDCs) that are able to form high-mass star(s). This is one of the purposes of the Herschel/HOBYS key programme. Here, we carry out the census and characterise of the properties of the MDCs population of the NGC 6357 H II region. Methods. Our study is based on the Herschel/PACS and SPIRE 70 500 mu m images of NGC 6357 complemented with (sub-)millimetre and mid-infrared data. We followed the procedure established by the Herschel/HOBYS consortium to extract similar to 0.1 pc massive dense cores using the get sources software. We estimated their physical parameters (temperatures, masses, luminosities) from spectral energy distribution (SED) fitting. Results. We obtain a complete census of 23 massive dense cores, amongst which one is found to be IR-quiet and twelve are starless, representing very early stages of the star-formation process. Focussing on the starless MDCs, we have considered their evolutionary status, and suggest that only five of them are likely to form a high-mass star. Conclusions. We find that, contrarily to the case in NGC 6334, the NGC 6357 region does not exhibit any ridge or hub features that are believed to be crucial to the massive star formation process. This study adds support for an empirical model in which massive dense cores and protostars simultaneously accrete mass from the surrounding filaments. In addition, the massive star formation in NGC 6357 seems to have stopped and the hottest stars in Pismis 24 have disrupted the filaments.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Russeil, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Figueira, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Zavagno, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Motte, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schneider, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Men'shchikov, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bontemps, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Andre, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Anderson, L. D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Benedettini, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Didelon, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Di Francesco, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Elia, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Konyves, V.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Luong, Q. NguyenUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nony, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pezzuto, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rygl, K. L. J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schisano, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Spinoglio, L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Tige, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
White, G. J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-147776
DOI: 10.1051/0004-6361/201833870
Journal or Publication Title: Astron. Astrophys.
Volume: 625
Date: 2019
Publisher: EDP SCIENCES S A
Place of Publication: LES ULIS CEDEX A
ISSN: 1432-0746
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
INITIAL CONDITIONS; INFALL MOTIONS; CONTINUUM; CLUSTERS; CATALOG; REGIONS; DUST; FRAGMENTATION; ATLASGAL; GLIMPSEMultiple languages
Astronomy & AstrophysicsMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/14777

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