The TOP-SCOPE Survey of Planck Galactic Cold Clumps: Survey Overview and Results of an Exemplar Source, PGCC G26.53+0.17

Tie Liu; Kee Tae Kim; Mika Juvela; Ke Wang; Ken'Ichi Tatematsu; James Di Francesco; Sheng Yuan Liu; Yuefang Wu; Mark Thompson; Gary Fuller; David Eden; Di Li; I. Ristorcelli; Sung Ju Kang; Yuxin Lin; D. Johnstone; J. H. He; P. M. Koch; Patricio Sanhueza; Sheng Li Qin; Q. Zhang; N. Hirano; Paul F. Goldsmith; Neal J. Evans; Glenn J. White; Minho Choi; Chang Won Lee; L. V. Toth; Steve Mairs; H. W. Yi; Mengyao Tang; Archana Soam; N. Peretto; Manash R. Samal; Michel Fich; Harriet Parsons; Jinghua Yuan; Chuan Peng Zhang; Johanna Malinen; George J. Bendo; A. Rivera-Ingraham; Hong Li Liu; Jan Wouterloot; Pak Shing Li; Lei Qian; Jonathan Rawlings; Mark G. Rawlings; Siyi Feng; Yuri Aikawa; S. Akhter; Dana Alina; Graham Bell; J. P. Bernard; Andrew Blain; Rebeka Bogner; L. Bronfman; D. Y. Byun; Scott Chapman; Huei Ru Chen; M. Chen; Wen Ping Chen; X. Chen; Xuepeng Chen; A. Chrysostomou; Giuliana Cosentino; M. R. Cunningham; K. Demyk; Emily Drabek-Maunder; Yasuo Doi; C. Eswaraiah; Edith Falgarone; O. Fehér; Helen Fraser; Per Friberg; G. Garay; J. X. Ge; W. K. Gear; Jane Greaves; X. Guan; Lisa Harvey-Smith; Tetsuo Hasegawa; J. Hatchell; Yuxin He; C. Henkel; T. Hirota; W. Holland; A. Hughes; E. Jarken; Tae Geun Ji; Izaskun Jimenez-Serra; Miju Kang; Koji S. Kawabata; Gwanjeong Kim; Jungha Kim; Jongsoo Kim; Shinyoung Kim; B. C. Koo; Woojin Kwon; Yi Jehng Kuan; K. M. Lacaille; Shih Ping Lai; C. F. Lee; J. E. Lee; Y. U. Lee; Dalei Li; Hua Bai Li; N. Lo; John A.P. Lopez; Xing Lu; A. Ran Lyo; D. Mardones; A. Marston; P. McGehee; F. Meng; L. Montier; Julien Montillaud; T. Moore; O. Morata; Gerald H. Moriarty-Schieven; S. Ohashi; Soojong Pak; Geumsook Park; R. Paladini; Kate M. Pattle; Gerardo Pech; V. M. Pelkonen; K. Qiu; Zhi Yuan Ren; John Richer; M. Saito; Takeshi Sakai; H. Shang; Hiroko Shinnaga; Dimitris Stamatellos; Y. W. Tang; Alessio Traficante; Charlotte Vastel; S. Viti; Andrew Walsh; Bingru Wang; Hongchi Wang; Junzhi Wang; D. Ward-Thompson; Anthony Whitworth; Ye Xu; J. Yang; Yao Lun Yang; Lixia Yuan; A. Zavagno; Guoyin Zhang; H. W. Zhang; Chenlin Zhou; Jianjun Zhou; Lei Zhu; Pei Zuo; Chao Zhang

doi:10.3847/1538-4365/aaa3dd

The TOP-SCOPE Survey of Planck Galactic Cold Clumps: Survey Overview and Results of an Exemplar Source, PGCC G26.53+0.17

Tie Liu, Kee Tae Kim, Mika Juvela, Ke Wang, Ken'Ichi Tatematsu, James Di Francesco, Sheng Yuan Liu, Yuefang Wu, Mark Thompson, Gary Fuller, David Eden, Di Li, I. Ristorcelli, Sung Ju Kang, Yuxin Lin, D. Johnstone, J. H. He, P. M. Koch, Patricio Sanhueza, Sheng Li QinQ. Zhang, N. Hirano, Paul F. Goldsmith, Neal J. Evans, Glenn J. White, Minho Choi, Chang Won Lee, L. V. Toth, Steve Mairs, H. W. Yi, Mengyao Tang, Archana Soam, N. Peretto, Manash R. Samal, Michel Fich, Harriet Parsons, Jinghua Yuan, Chuan Peng Zhang, Johanna Malinen, George J. Bendo, A. Rivera-Ingraham, Hong Li Liu, Jan Wouterloot, Pak Shing Li, Lei Qian, Jonathan Rawlings, Mark G. Rawlings, Siyi Feng, Yuri Aikawa, S. Akhter, Dana Alina, Graham Bell, J. P. Bernard, Andrew Blain, Rebeka Bogner, L. Bronfman, D. Y. Byun, Scott Chapman, Huei Ru Chen, M. Chen, Wen Ping Chen, X. Chen, Xuepeng Chen, A. Chrysostomou, Giuliana Cosentino, M. R. Cunningham, K. Demyk, Emily Drabek-Maunder, Yasuo Doi, C. Eswaraiah, Edith Falgarone, O. Fehér, Helen Fraser, Per Friberg, G. Garay, J. X. Ge, W. K. Gear, Jane Greaves, X. Guan, Lisa Harvey-Smith, Tetsuo Hasegawa, J. Hatchell, Yuxin He, C. Henkel, T. Hirota, W. Holland, A. Hughes, E. Jarken, Tae Geun Ji, Izaskun Jimenez-Serra, Miju Kang, Koji S. Kawabata, Gwanjeong Kim, Jungha Kim, Jongsoo Kim, Shinyoung Kim, B. C. Koo, Woojin Kwon, Yi Jehng Kuan, K. M. Lacaille, Shih Ping Lai, C. F. Lee, J. E. Lee, Y. U. Lee, Dalei Li, Hua Bai Li, N. Lo, John A.P. Lopez, Xing Lu, A. Ran Lyo, D. Mardones, A. Marston, P. McGehee, F. Meng, L. Montier, Julien Montillaud, T. Moore, O. Morata, Gerald H. Moriarty-Schieven, S. Ohashi, Soojong Pak, Geumsook Park, R. Paladini, Kate M. Pattle, Gerardo Pech, V. M. Pelkonen, K. Qiu, Zhi Yuan Ren, John Richer, M. Saito, Takeshi Sakai, H. Shang, Hiroko Shinnaga, Dimitris Stamatellos, Y. W. Tang, Alessio Traficante, Charlotte Vastel, S. Viti, Andrew Walsh, Bingru Wang, Hongchi Wang, Junzhi Wang, D. Ward-Thompson, Anthony Whitworth, Ye Xu, J. Yang, Yao Lun Yang, Lixia Yuan, A. Zavagno, Guoyin Zhang, H. W. Zhang, Chenlin Zhou, Jianjun Zhou, Lei Zhu, Pei Zuo, Chao Zhang

地球科學系(含海洋環境研究所)

研究成果: 雜誌貢獻 › 期刊論文 › 同行評審

53 引文斯高帕斯（Scopus）

摘要

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 Mpc^-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.

原文	英語
文章編號	28
期刊	Astrophysical Journal, Supplement Series
卷	234
發行號	2
DOIs	https://doi.org/10.3847/1538-4365/aaa3dd
出版狀態	已發佈 - 2018 2月

ASJC Scopus subject areas

天文和天體物理學
空間與行星科學

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10.3847/1538-4365/aaa3dd

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引用此

Liu, T., Kim, K. T., Juvela, M., Wang, K., Tatematsu, KI., Francesco, J. D., 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., ... Zhang, C. (2018). The TOP-SCOPE Survey of Planck Galactic Cold Clumps: Survey Overview and Results of an Exemplar Source, PGCC G26.53+0.17. Astrophysical Journal, Supplement Series, 234(2), 文章 28. https://doi.org/10.3847/1538-4365/aaa3dd

Liu, T, Kim, KT, Juvela, M, Wang, K, Tatematsu, KI, Francesco, JD, Liu, SY, Wu, Y, Thompson, M, Fuller, G, Eden, D, Li, D, Ristorcelli, I, Kang, SJ, Lin, Y, Johnstone, D, He, JH, Koch, PM, Sanhueza, P, Qin, SL, Zhang, Q, Hirano, N, Goldsmith, PF, Evans, NJ, White, GJ, Choi, M, Lee, CW, Toth, LV, Mairs, S, Yi, HW, Tang, M, Soam, A, Peretto, N, Samal, MR, Fich, M, Parsons, H, Yuan, J, Zhang, CP, Malinen, J, Bendo, GJ, Rivera-Ingraham, A, Liu, HL, Wouterloot, J, Li, PS, Qian, L, Rawlings, J, Rawlings, MG, Feng, S, Aikawa, Y, Akhter, S, Alina, D, Bell, G, Bernard, JP, Blain, A, Bogner, R, Bronfman, L, Byun, DY, Chapman, S, Chen, HR, Chen, M, Chen, WP, Chen, X, Chen, X, Chrysostomou, A, Cosentino, G, Cunningham, MR, Demyk, K, Drabek-Maunder, E, Doi, Y, Eswaraiah, C, Falgarone, E, Fehér, O, Fraser, H, Friberg, P, Garay, G, Ge, JX, Gear, WK, Greaves, J, Guan, X, Harvey-Smith, L, Hasegawa, T, Hatchell, J, He, Y, Henkel, C, Hirota, T, Holland, W, Hughes, A, Jarken, E, Ji, TG, Jimenez-Serra, I, Kang, M, Kawabata, KS, Kim, G, Kim, J, Kim, J, Kim, S, Koo, BC, Kwon, W, Kuan, YJ, Lacaille, KM, Lai, SP, Lee, CF, Lee, JE, Lee, YU, Li, D, Li, HB, Lo, N, Lopez, JAP, Lu, X, Lyo, AR, Mardones, D, Marston, A, McGehee, P, Meng, F, Montier, L, Montillaud, J, Moore, T, Morata, O, Moriarty-Schieven, GH, Ohashi, S, Pak, S, Park, G, Paladini, R, Pattle, KM, Pech, G, Pelkonen, VM, Qiu, K, Ren, ZY, Richer, J, Saito, M, Sakai, T, Shang, H, Shinnaga, H, Stamatellos, D, Tang, YW, Traficante, A, Vastel, C, Viti, S, Walsh, A, Wang, B, Wang, H, Wang, J, Ward-Thompson, D, Whitworth, A, Xu, Y, Yang, J, Yang, YL, Yuan, L, Zavagno, A, Zhang, G, Zhang, HW, Zhou, C, Zhou, J, Zhu, L, Zuo, P & Zhang, C 2018, 'The TOP-SCOPE Survey of Planck Galactic Cold Clumps: Survey Overview and Results of an Exemplar Source, PGCC G26.53+0.17', Astrophysical Journal, Supplement Series, 卷 234, 編號 2, 28. https://doi.org/10.3847/1538-4365/aaa3dd

@article{bfe4aa17cc104fce9ae32ed990a2b5e8,

title = "The TOP-SCOPE Survey of Planck Galactic Cold Clumps: Survey Overview and Results of an Exemplar Source, PGCC G26.53+0.17",

abstract = "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 Mpc-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.",

keywords = "ISM: abundances, ISM: clouds, ISM: kinematics and dynamics, stars: formation, surveys",

author = "Tie Liu and Kim, {Kee Tae} and Mika Juvela and Ke Wang and Ken'Ichi Tatematsu and Francesco, {James Di} and Liu, {Sheng Yuan} and Yuefang Wu and Mark Thompson and Gary Fuller and David Eden and Di Li and I. Ristorcelli and Kang, {Sung Ju} and Yuxin Lin and D. Johnstone and He, {J. H.} and Koch, {P. M.} and Patricio Sanhueza and Qin, {Sheng Li} and Q. Zhang and N. Hirano and Goldsmith, {Paul F.} and Evans, {Neal J.} and White, {Glenn J.} and Minho Choi and Lee, {Chang Won} and Toth, {L. V.} and Steve Mairs and Yi, {H. W.} and Mengyao Tang and Archana Soam and N. Peretto and Samal, {Manash R.} and Michel Fich and Harriet Parsons and Jinghua Yuan and Zhang, {Chuan Peng} and Johanna Malinen and Bendo, {George J.} and A. Rivera-Ingraham and Liu, {Hong Li} and Jan Wouterloot and Li, {Pak Shing} and Lei Qian and Jonathan Rawlings and Rawlings, {Mark G.} and Siyi Feng and Yuri Aikawa and S. Akhter and Dana Alina and Graham Bell and Bernard, {J. P.} and Andrew Blain and Rebeka Bogner and L. Bronfman and Byun, {D. Y.} and Scott Chapman and Chen, {Huei Ru} and M. Chen and Chen, {Wen Ping} and X. Chen and Xuepeng Chen and A. Chrysostomou and Giuliana Cosentino and Cunningham, {M. R.} and K. Demyk and Emily Drabek-Maunder and Yasuo Doi and C. Eswaraiah and Edith Falgarone and O. Feh{\'e}r and Helen Fraser and Per Friberg and G. Garay and Ge, {J. X.} and Gear, {W. K.} and Jane Greaves and X. Guan and Lisa Harvey-Smith and Tetsuo Hasegawa and J. Hatchell and Yuxin He and C. Henkel and T. Hirota and W. Holland and A. Hughes and E. Jarken and Ji, {Tae Geun} and Izaskun Jimenez-Serra and Miju Kang and Kawabata, {Koji S.} and Gwanjeong Kim and Jungha Kim and Jongsoo Kim and Shinyoung Kim and Koo, {B. C.} and Woojin Kwon and Kuan, {Yi Jehng} and Lacaille, {K. M.} and Lai, {Shih Ping} and Lee, {C. F.} and Lee, {J. E.} and Lee, {Y. U.} and Dalei Li and Li, {Hua Bai} and N. Lo and Lopez, {John A.P.} and Xing Lu and Lyo, {A. Ran} and D. Mardones and A. Marston and P. McGehee and F. Meng and L. Montier and Julien Montillaud and T. Moore and O. Morata and Moriarty-Schieven, {Gerald H.} and S. Ohashi and Soojong Pak and Geumsook Park and R. Paladini and Pattle, {Kate M.} and Gerardo Pech and Pelkonen, {V. M.} and K. Qiu and Ren, {Zhi Yuan} and John Richer and M. Saito and Takeshi Sakai and H. Shang and Hiroko Shinnaga and Dimitris Stamatellos and Tang, {Y. W.} and Alessio Traficante and Charlotte Vastel and S. Viti and Andrew Walsh and Bingru Wang and Hongchi Wang and Junzhi Wang and D. Ward-Thompson and Anthony Whitworth and Ye Xu and J. Yang and Yang, {Yao Lun} and Lixia Yuan and A. Zavagno and Guoyin Zhang and Zhang, {H. W.} and Chenlin Zhou and Jianjun Zhou and Lei Zhu and Pei Zuo and Chao Zhang",

year = "2018",

month = feb,

doi = "10.3847/1538-4365/aaa3dd",

language = "English",

volume = "234",

journal = "Astrophysical Journal, Supplement Series",

issn = "0067-0049",

publisher = "IOP Publishing Ltd.",

number = "2",

}

TY - JOUR

T1 - The TOP-SCOPE Survey of Planck Galactic Cold Clumps

T2 - Survey Overview and Results of an Exemplar Source, PGCC G26.53+0.17

AU - Liu, Tie

AU - Kim, Kee Tae

AU - Juvela, Mika

AU - Wang, Ke

AU - Tatematsu, Ken'Ichi

AU - Francesco, James Di

AU - Liu, Sheng Yuan

AU - Wu, Yuefang

AU - Thompson, Mark

AU - Fuller, Gary

AU - Eden, David

AU - Li, Di

AU - Ristorcelli, I.

AU - Kang, Sung Ju

AU - Lin, Yuxin

AU - Johnstone, D.

AU - He, J. H.

AU - Koch, P. M.

AU - Sanhueza, Patricio

AU - Qin, Sheng Li

AU - Zhang, Q.

AU - Hirano, N.

AU - Goldsmith, Paul F.

AU - Evans, Neal J.

AU - White, Glenn J.

AU - Choi, Minho

AU - Lee, Chang Won

AU - Toth, L. V.

AU - Mairs, Steve

AU - Yi, H. W.

AU - Tang, Mengyao

AU - Soam, Archana

AU - Peretto, N.

AU - Samal, Manash R.

AU - Fich, Michel

AU - Parsons, Harriet

AU - Yuan, Jinghua

AU - Zhang, Chuan Peng

AU - Malinen, Johanna

AU - Bendo, George J.

AU - Rivera-Ingraham, A.

AU - Liu, Hong Li

AU - Wouterloot, Jan

AU - Li, Pak Shing

AU - Qian, Lei

AU - Rawlings, Jonathan

AU - Rawlings, Mark G.

AU - Feng, Siyi

AU - Aikawa, Yuri

AU - Akhter, S.

AU - Alina, Dana

AU - Bell, Graham

AU - Bernard, J. P.

AU - Blain, Andrew

AU - Bogner, Rebeka

AU - Bronfman, L.

AU - Byun, D. Y.

AU - Chapman, Scott

AU - Chen, Huei Ru

AU - Chen, M.

AU - Chen, Wen Ping

AU - Chen, X.

AU - Chen, Xuepeng

AU - Chrysostomou, A.

AU - Cosentino, Giuliana

AU - Cunningham, M. R.

AU - Demyk, K.

AU - Drabek-Maunder, Emily

AU - Doi, Yasuo

AU - Eswaraiah, C.

AU - Falgarone, Edith

AU - Fehér, O.

AU - Fraser, Helen

AU - Friberg, Per

AU - Garay, G.

AU - Ge, J. X.

AU - Gear, W. K.

AU - Greaves, Jane

AU - Guan, X.

AU - Harvey-Smith, Lisa

AU - Hasegawa, Tetsuo

AU - Hatchell, J.

AU - He, Yuxin

AU - Henkel, C.

AU - Hirota, T.

AU - Holland, W.

AU - Hughes, A.

AU - Jarken, E.

AU - Ji, Tae Geun

AU - Jimenez-Serra, Izaskun

AU - Kang, Miju

AU - Kawabata, Koji S.

AU - Kim, Gwanjeong

AU - Kim, Jungha

AU - Kim, Jongsoo

AU - Kim, Shinyoung

AU - Koo, B. C.

AU - Kwon, Woojin

AU - Kuan, Yi Jehng

AU - Lacaille, K. M.

AU - Lai, Shih Ping

AU - Lee, C. F.

AU - Lee, J. E.

AU - Lee, Y. U.

AU - Li, Dalei

AU - Li, Hua Bai

AU - Lo, N.

AU - Lopez, John A.P.

AU - Lu, Xing

AU - Lyo, A. Ran

AU - Mardones, D.

AU - Marston, A.

AU - McGehee, P.

AU - Meng, F.

AU - Montier, L.

AU - Montillaud, Julien

AU - Moore, T.

AU - Morata, O.

AU - Moriarty-Schieven, Gerald H.

AU - Ohashi, S.

AU - Pak, Soojong

AU - Park, Geumsook

AU - Paladini, R.

AU - Pattle, Kate M.

AU - Pech, Gerardo

AU - Pelkonen, V. M.

AU - Qiu, K.

AU - Ren, Zhi Yuan

AU - Richer, John

AU - Saito, M.

AU - Sakai, Takeshi

AU - Shang, H.

AU - Shinnaga, Hiroko

AU - Stamatellos, Dimitris

AU - Tang, Y. W.

AU - Traficante, Alessio

AU - Vastel, Charlotte

AU - Viti, S.

AU - Walsh, Andrew

AU - Wang, Bingru

AU - Wang, Hongchi

AU - Wang, Junzhi

AU - Ward-Thompson, D.

AU - Whitworth, Anthony

AU - Xu, Ye

AU - Yang, J.

AU - Yang, Yao Lun

AU - Yuan, Lixia

AU - Zavagno, A.

AU - Zhang, Guoyin

AU - Zhang, H. W.

AU - Zhou, Chenlin

AU - Zhou, Jianjun

AU - Zhu, Lei

AU - Zuo, Pei

AU - Zhang, Chao

PY - 2018/2

Y1 - 2018/2

N2 - 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 Mpc-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.

AB - 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 Mpc-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.

KW - ISM: abundances

KW - ISM: clouds

KW - ISM: kinematics and dynamics

KW - stars: formation

KW - surveys

UR - http://www.scopus.com/inward/record.url?scp=85042529579&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85042529579&partnerID=8YFLogxK

U2 - 10.3847/1538-4365/aaa3dd

DO - 10.3847/1538-4365/aaa3dd

M3 - Article

AN - SCOPUS:85042529579

SN - 0067-0049

VL - 234

JO - Astrophysical Journal, Supplement Series

JF - Astrophysical Journal, Supplement Series

IS - 2

M1 - 28

ER -

The TOP-SCOPE Survey of Planck Galactic Cold Clumps: Survey Overview and Results of an Exemplar Source, PGCC G26.53+0.17

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ASJC Scopus subject areas

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