Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/26555
Title: | ALMA survey of massive cluster progenitors from ATLASGAL. Limited fragmentation at the early evolutionary stage of massive clumps | Authors: | Csengeri, T. Bontemps, S. Wyrowski, F. Motte, F. Menten, K. M. Beuther, H. Bronfman, L. Commerçon, B. Chapillon, E. Duarte-Cabral, A. Fuller, G. A. Henning, Th. Leurini, Silvia Longmore, S. Palau, A. Peretto, N. Schuller, F. Tan, J. C. Testi, L. TRAFICANTE, ALESSIO Urquhart, J. S. |
Issue Date: | 2017 | Journal: | ASTRONOMY & ASTROPHYSICS | Number: | 600 | First Page: | L10 | Abstract: | The early evolution of massive cluster progenitors is poorly understood. We investigate the fragmentation properties from 0.3 pc to 0.06 pc scales of a homogenous sample of infrared-quiet massive clumps within 4.5 kpc selected from the ATLASGAL survey. Using the ALMA 7 m array we detect compact dust continuum emission towards all targets and find that fragmentation, at these scales, is limited. The mass distribution of the fragments uncovers a large fraction of cores above 40 M<SUB>☉</SUB>, corresponding to massive dense cores (MDCs) with masses up to 400 M<SUB>☉</SUB>. Seventy-seven percent of the clumps contain at most 3 MDCs per clump, and we also reveal single clumps/MDCs. The most massive cores are formed within the more massive clumps and a high concentration of mass on small scales reveals a high core formation efficiency. The mass of MDCs highly exceeds the local thermal Jeans mass, and we lack the observational evidence of a sufficiently high level of turbulence or strong enough magnetic fields to keep the most massive MDCs in equilibrium. If already collapsing, the observed fragmentation properties with a high core formation efficiency are consistent with the collapse setting in at parsec scales. <P />Full Table A.1 is only available at the CDS via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr">http://cdsarc.u-strasbg.fr</A> (<A href="http://130.79.128.5">http://130.79.128.5</A>) or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/600/L10">http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/600/L10</A> | URI: | http://hdl.handle.net/20.500.12386/26555 | URL: | https://www.aanda.org/articles/aa/abs/2017/04/aa29754-16/aa29754-16.html | ISSN: | 0004-6361 | DOI: | 10.1051/0004-6361/201629754 | Bibcode ADS: | 2017A&A...600L..10C | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
1703.03273.pdf | 8.42 MB | Adobe PDF | View/Open | |
aa29754 16.pdf | Pdf editoriale | 1.71 MB | Adobe PDF | View/Open |
Page view(s)
96
checked on Sep 19, 2024
Download(s)
48
checked on Sep 19, 2024
Google ScholarTM
Check
Altmetric
Altmetric
Items in DSpace are published in Open Access, unless otherwise indicated.