2018ApJS..234...28L

Query : 2018ApJS..234...28L

2018ApJS..234...28L - Astrophys. J., Suppl. Ser., 234, 28-28 (2018/February-0)

The TOP-SCOPE survey of Planck Galactic cold clumps: survey overview and results of an exemplar source, PGCC G26.53+0.17.

LIU T., KIM K.-T., JUVELA M., WANG K., TATEMATSU K., DI FRANCESCO J., LIU S.-Y., WU Y., THOMPSON M., FULLER G., EDEN D., LI D., RISTORCELLI I., KANG S.-J., LIN Y., JOHNSTONE D., HE J.H., KOCH P.M., SANHUEZA P., QIN S.-L., ZHANG Q., HIRANO N., GOLDSMITH P.F., EVANS II N.J., WHITE G.J., CHOI M., LEE C.W., TOTH L.V., MAIRS S., YI H.-W., TANG M., SOAM A., PERETTO N., SAMAL M.R., FICH M., PARSONS H., YUAN J., ZHANG C.-P., MALINEN J., BENDO G.J., RIVERA-INGRAHAM A., LIU H.-L., WOUTERLOOT J., LI P.S., QIAN L., RAWLINGS J., RAWLINGS M.G., FENG S., AIKAWA Y., AKHTER S., ALINA D., BELL G., BERNARD J.-P., BLAIN A., BOGNER R., BRONFMAN L., BYUN D.-Y., CHAPMAN S., CHEN H.-R., CHEN M., CHEN W.-P., CHEN X., CHEN X., CHRYSOSTOMOU A., COSENTINO G., CUNNINGHAM M.R., DEMYK K., DRABEK-MAUNDER E., DOI Y., ESWARAIAH C., FALGARONE E., FEHER O., FRASER H., FRIBERG P., GARAY G., GE J.X., GEAR W.K., GREAVES J., GUAN X., HARVEY-SMITH L., HASEGAWA T., HATCHELL J., HE Y., HENKEL C., HIROTA T., HOLLAND W., HUGHES A., JARKEN E., JI T.-G., JIMENEZ-SERRA I., KANG M., KAWABATA K.S., KIM G., KIM J., KIM J., KIM S., KOO B.-C., KWON W., KUAN Y.-J., LACAILLE K.M., LAI S.-P., LEE C.F., LEE J.-E., LEE Y.-U., LI D., LI H.-B., LO N., LOPEZ J.A.P., LU X., LYO A.-R., MARDONES D., MARSTON A., McGEHEE P., MENG F., MONTIER L., MONTILLAUD J., MOORE T., MORATA O., MORIARTY-SCHIEVEN G.H., OHASHI S., PAK S., PARK G., PALADINI R., PATTLE K.M., PECH G., PELKONEN V.-M., QIU K., REN Z.-Y., RICHER J., SAITO M., SAKAI T., SHANG H., SHINNAGA H., STAMATELLOS D., TANG Y.-W., TRAFICANTE A., VASTEL C., VITI S., WALSH A., WANG B., WANG H., WANG J., WARD-THOMPSON D., WHITWORTH A., XU Y., YANG J., YANG Y.-L., YUAN L., ZAVAGNO A., ZHANG G., ZHANG H.-W., ZHOU C., ZHOU J., ZHU L., ZUO P. and ZHANG C.

Abstract (from CDS):

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 ∼2000 PGCCs in J = 1-0 transitions of CO isotopologues and ∼1000 PGCCs in 850 µm 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 ∼6200 M☉, ∼12 pc, and ∼500 M☉ 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 (β) 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.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): ISM: abundances - ISM: clouds - ISM: kinematics and dynamics - stars: formation - surveys

Nomenclature: Fig. 6, Table 1: [LKJ2018] NN (Nos 1-10).

Simbad objects: 26

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Number of rows : 26
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 Barnard 211 DNe 04 17 35 +27 43.1           ~ 141 0
2 Barnard 213 DNe 04 20 51 +27 16.3           ~ 249 0
3 GAL 174.20-00.08 Cld 05 30 45.9 +33 47 56           ~ 210 2
4 NAME lam Ori Complex SFR 05 35 06 +09 56.0           ~ 86 0
5 NAME Ori A MoC 05 38 -07.1           ~ 3187 0
6 NAME Musca Cld 12 23 -71.3           ~ 258 0
7 NAME Upper Sco-Cen As* 16 15 -24.2           ~ 1497 1
8 NAME the Pipe Nebula DNe 17 30 -25.0           ~ 442 1
9 W 31c HII 18 10 29.1 -19 56 05           ~ 357 0
10 [CCE98b] 011.11-0.12 Cld 18 10.5 -19 23           ~ 119 2
11 SDC G14.225-0.506 DNe 18 18 11.49 -16 49 29.6           ~ 26 0
12 [LKJ2018] 10 PoC 18 36 57.84 -05 26 56.4           ~ 1 0
13 [LKJ2018] 9 PoC 18 37 00.48 -05 25 40.8           ~ 1 0
14 [LKJ2018] 8 PoC 18 37 00.72 -05 25 01.2           ~ 1 0
15 [LKJ2018] 7 PoC 18 37 02.64 -05 24 39.6           ~ 1 0
16 [LKJ2018] 5 PoC 18 37 07.44 -05 23 09.6           ~ 1 0
17 [LKJ2018] 6 PoC 18 37 07.68 -05 23 56.4           ~ 1 0
18 [LKJ2018] 2 PoC 18 37 08.40 -05 20 27.6           ~ 1 0
19 [LKJ2018] 4 PoC 18 37 09.12 -05 21 54.0           ~ 1 0
20 [LKJ2018] 3 PoC 18 37 09.36 -05 21 03.6           ~ 1 0
21 PGCC G026.53+00.71 MoC 18 37 10.159 -05 22 20.84           ~ 4 0
22 [LKJ2018] 1 PoC 18 37 12.00 -05 19 12.0           ~ 1 0
23 NAME Dragon Nebula DNe 18 42 50.6 -04 03 30           ~ 177 0
24 MSXDC G028.23-00.19 DNe 18 43 31.3 -04 13 18           ~ 27 0
25 [ABJ2009] U33.92+0.11 MoC 18 52 51 +00 55.8           ~ 4 0
26 NAME Gould Belt PoG ~ ~           ~ 956 1

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