The TOP-SCOPE survey of planck galactic cold clumps: survey overview and results of an exemplar source, PGCC G26.53+0.17
Author
dc.contributor.author
Liu, Tie
Author
dc.contributor.author
He, JinHua
Author
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Bronfman Aguiló, Leonardo
Author
dc.contributor.author
Garay Brignardello, Guido
Author
dc.contributor.author
Lo, N.
Author
dc.contributor.author
Mardones Pérez, Diego
Admission date
dc.date.accessioned
2018-07-26T20:50:58Z
Available date
dc.date.available
2018-07-26T20:50:58Z
Publication date
dc.date.issued
2018
Cita de ítem
dc.identifier.citation
Astrophysical Journal Supplement Series 234:28 (31pp), 2018 February
es_ES
Identifier
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10.3847/1538-4365/aaa3dd
Identifier
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https://repositorio.uchile.cl/handle/2250/150355
Abstract
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The low dust temperatures (< 14 K) of Planck Galactic cold clumps (PGCCs) make them ideal targets to probe the initial conditions and very early phase of star formation. "TOP-SCOPE" is a joint survey program targeting similar to 2000 PGCCs in J = 1-0 transitions of CO isotopologues and similar to 1000 PGCCs in 850 mu m continuum emission. The objective of the "TOP-SCOPE" survey and the joint surveys (SMT 10 m, KVN 21 m, and NRO 45 m) is to statistically study the initial conditions occurring during star formation and the evolution of molecular clouds, across a wide range of environments. The observations, data analysis, and example science cases for these surveys are introduced with an exemplar source, PGCC G26.53+0.17 (G26), which is a filamentary infrared dark cloud (IRDC). The total mass, length, and mean line mass (M/L) of the G26 filament are similar to 6200 M-circle dot, similar to 12 pc, and similar to 500 M-circle dot pc(-1), respectively. Ten massive clumps, including eight starless ones, are found along the filament. The most massive clump as a whole may still be in global collapse, while its denser part seems to be undergoing expansion owing to outflow feedback. The fragmentation in the G26 filament from cloud scale to clump scale is in agreement with gravitational fragmentation of an isothermal, nonmagnetized, and turbulent supported cylinder. A bimodal behavior in dust emissivity spectral index (beta) distribution is found in G26, suggesting grain growth along the filament. The G26 filament may be formed owing to large-scale compression flows evidenced by the temperature and velocity gradients across its natal cloud.
es_ES
Patrocinador
dc.description.sponsorship
KASI fellowship
EACOA fellowship
German Research Foundation (DFG)
WA3628-1/1
1573
National Natural Science Foundation of China (NSFC)
U1631237
Chinese Academy of Sciences (CAS)
U1631237
Top Talents Program of Yunnan Province
2015HA030
Academy of Finland
285769
ERC-STG
679852 RADFEEDBACK
National Research Foundation of Korea (NRF) - Ministry of Education, Science, and Technology
NRF-2016R1A2B4012593
National Research Foundation of Korea (NRF) - Ministry of Science, ICT, and Future Planning
NRF-2015R1C1A1A01052160
Chinese Academy of Sciences
XDB09000000
Science and Technology Facilities Council of the United Kingdom
ESO-ARO program
196.C-0999(A)
CONICYT
PFB-06
Ministry of Science and Technology of Taiwan
MOST 105-2119-M-007-024
MOST 106-2119-M-007-021-MY3
National Research Foundation of Korea
NRF-2015R1A2A2A01004769
Korea Astronomy and Space Science Institute
European Research Council
320773 SAEMPL