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Simultaneous low- and high-mass star formation in a massive protocluster : ALMA observations of G11.92-0.61
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dc.contributor.author | Cyganowski, C. J. | |
dc.contributor.author | Brogan, C. L. | |
dc.contributor.author | Hunter, T. R. | |
dc.contributor.author | Smith, R. | |
dc.contributor.author | Kruijssen, J. M. D. | |
dc.contributor.author | Bonnell, I. A. | |
dc.contributor.author | Zhang, Q. | |
dc.date.accessioned | 2017-02-07T15:30:10Z | |
dc.date.available | 2017-02-07T15:30:10Z | |
dc.date.issued | 2017-07-01 | |
dc.identifier | 249093846 | |
dc.identifier | e2bd67e2-57eb-432b-9607-f3ad6efb49db | |
dc.identifier | 000402808700093 | |
dc.identifier | 85020944265 | |
dc.identifier.citation | Cyganowski , C J , Brogan , C L , Hunter , T R , Smith , R , Kruijssen , J M D , Bonnell , I A & Zhang , Q 2017 , ' Simultaneous low- and high-mass star formation in a massive protocluster : ALMA observations of G11.92-0.61 ' , Monthly Notices of the Royal Astronomical Society , vol. 468 , no. 3 , pp. 3694-3708 . https://doi.org/10.1093/mnras/stx043 | en |
dc.identifier.issn | 0035-8711 | |
dc.identifier.other | ArXiv: http://arxiv.org/abs/1701.02802v2 | |
dc.identifier.uri | https://hdl.handle.net/10023/10245 | |
dc.description.abstract | We present 1.05 mm ALMA observations of the deeply embedded high-mass protocluster G11.92−0.61, designed to search for low-mass cores within the accretion reservoir of the massive protostars. Our ALMA mosaic, which covers an extent of ∼0.7 pc at sub-arcsecond (∼1400 au) resolution, reveals a rich population of 16 new millimetre continuum sources surrounding the three previously-known millimetre cores. Most ofthe new sources are located in the outer reaches of the accretion reservoir: the median projected separation from the central, massive (proto)star MM1 is ∼0.17 pc. The derived physical properties of the new millimetre continuum sources are consistent with those of low-mass prestellar and protostellar cores in nearby star-forming regions:the median mass, radius, and density of the new sources are 1.3 M⊙, 1600 au, and nH2 ∼107 cm−3. At least three of the low-mass cores in G11.92−0.61 drive molecular outflows, traced by high-velocity 12CO(3-2) (observed with the SMA) and/or by H2CO and CH3OH emission (observed with ALMA). This finding, combined with the known outflow/accretion activity of MM1, indicates that high- and low-mass stars are forming (accreting) simultaneously within this protocluster. Our ALMA results are consistent with the predictions of competitive-accretion-type models in which high-mass stars form along with their surrounding clusters. | |
dc.format.extent | 17 | |
dc.format.extent | 740760 | |
dc.language.iso | eng | |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society | en |
dc.subject | ISM: individual objects (G11.92-0.61) | en |
dc.subject | ISM: molecules | en |
dc.subject | Stars: formation | en |
dc.subject | Stars: protostars | en |
dc.subject | Submillimetre: ISM | en |
dc.subject | QB Astronomy | en |
dc.subject | QC Physics | en |
dc.subject | Astronomy and Astrophysics | en |
dc.subject | DAS | en |
dc.subject.lcc | QB | en |
dc.subject.lcc | QC | en |
dc.title | Simultaneous low- and high-mass star formation in a massive protocluster : ALMA observations of G11.92-0.61 | en |
dc.type | Journal article | en |
dc.contributor.sponsor | Science & Technology Facilities Council | en |
dc.contributor.sponsor | European Research Council | en |
dc.contributor.institution | University of St Andrews. School of Physics and Astronomy | en |
dc.identifier.doi | 10.1093/mnras/stx043 | |
dc.description.status | Peer reviewed | en |
dc.identifier.grantnumber | ST/M001296/1 | en |
dc.identifier.grantnumber | en |
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