The JCMT Gould Belt Survey: first results from SCUBA-2 observations of the Cepheus Flare region

被引：22

作者：

Pattle, K. ^{[1
]}

Ward-Thompson, D. ^{[1
]}

Kirk, J. M. ^{[1
]}

Di Francesco, J. ^{[2
,3
]}

Kirk, H. ^{[2
]}

Mottram, J. C. ^{[4
,5
]}

Keown, J. ^{[3
]}

Buckle, J. ^{[6
,7
]}

Beaulieu, S. F. ^{[8
]}

Berry, D. S. ^{[9
]}

Broekhoven-Fiene, H. ^{[3
]}

Currie, M. J.

Fich, M. ^{[8
]}

Hatchell, J. ^{[10
]}

Jenness, T. ^{[9
,11
]}

Johnstone, D. ^{[2
,3
,9
]}

Nutter, D. ^{[12
]}

Pineda, J. E. ^{[13
,14
,15
]}

Quinn, C.

Salji, C. ^{[6
,7
]}

Tisi, S. ^{[8
]}

Walker-Smith, S. ^{[6
,7
]}

Hogerheijde, M. R. ^{[4
]}

Bastien, P. ^{[16
,17
]}

Bresnahan, D.

Butner, H. ^{[18
]}

Chen, M. ^{[3
]}

Chrysostomou, A. ^{[19
]}

Coude, S.

Davis, C. J. ^{[20
]}

Drabek-Maunder, E. ^{[21
]}

Duarte-Cabral, A.

Fiege, J. ^{[22
]}

Friberg, P.

Friesen, R. ^{[23
]}

Fuller, G. A.

Graves, S. ^{[12
]}

Greaves, J. ^{[9
]}

Gregson, J. ^{[24
,25
]}

Holland, W. ^{[26
,27
]}

Joncas, G. ^{[28
,29
]}

Knee, L. B. G. ^{[2
]}

Mairs, S. ^{[3
]}

Marsh, K. ^{[12
]}

Matthews, B. C. ^{[2
,3
]}

Moriarty-Schieven, G. ^{[2
]}

Mowat, C.

Rawlings, J. ^{[30
]}

Richer, J. ^{[6
,7
]}

Robertson, D. ^{[31
]}

机构：

[1] Univ Cent Lancashire, Jeremiah Horrocks Inst, Preston PR1 2HE, Lancs, England

[2] NRC Herzberg Astron & Astrophys, 5071 West Saanich Rd, Victoria, BC V9E 2E7, Canada

[3] Univ Victoria, Dept Phys & Astron, Victoria, BC V8P 1A1, Canada

[4] Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands

[5] Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany

[6] Cavendish Lab, Astrophys Grp, J J Thomson Ave, Cambridge CB3 0HE, England

[7] Univ Cambridge, Inst Astron, Kavli Inst Cosmol, Madingley Rd, Cambridge CB3 0HA, England

[8] Univ Waterloo, Dept Phys & Astron, Waterloo, ON N2L 3G1, Canada

[9] Joint Astron Ctr, 660 N A Ohoku Pl,Univ Pk, Hilo, HI 96720 USA

[10] Univ Exeter, Phys & Astron, Stocker Rd, Exeter EX4 4QL, Devon, England

[11] LSST Project Off, 933 N Cherry Ave, Tucson, AZ 85719 USA

[12] Cardiff Univ, Sch Phys & Astron, Cardiff CF24 3AA, S Glam, Wales

[13] ESO, D-85748 Garching, Germany

[14] Univ Manchester, Sch Phys & Astron, Jodrell Bank Ctr Astrophys, Oxford Rd,Alan Turing Bldg, Manchester M13 9PL, Lancs, England

[15] ETH, Inst Astron, Wolfgang Pauli Str 27, CH-8093 Zurich, Switzerland

[16] Univ Montreal, Ctr Rech Astrophys Quebec, C P 6128,Succ Centre Ville, Montreal, PQ H3C 3J7, Canada

[17] Univ Montreal, Dept Phys, C P 6128,Succ Centre Ville, Montreal, PQ H3C 3J7, Canada

[18] James Madison Univ, Harrisonburg, VA 22807 USA

[19] Univ Hertfordshire, Sch Phys Astron & Math, Coll Lane, Hatfield AL10 9AB, Herts, England

[20] Liverpool John Moores Univ, Astrophys Res Inst, Birkenhead CH41 1LD, Merseyside, England

[21] Imperial Coll London, Blackett Lab, Prince Consort Rd, London SW7 2BB, England

[22] Univ Manitoba, Dept Phys & Astron, Winnipeg, MB R3T 2N2, Canada

[23] Univ Toronto, Dunlap Inst Astron & Astrophys, 50 St George St, Toronto, ON M5S 3H4, Canada

[24] Open Univ, Dept Phys Sci, Milton Keynes MK7 6AA, Bucks, England

[25] Rutherford Appleton Lab, Chilton OX11 0NL, Didcot, England

[26] Royal Observ, UK Astron Technol Ctr, Blackford Hill, Edinburgh EH9 3HJ, Midlothian, Scotland

[27] Univ Edinburgh, Royal Observ, Inst Astron, Blackford Hill, Edinburgh EH9 3HJ, Midlothian, Scotland

[28] Univ Laval, Ctr Rech Astrophys Quebec, 1045 Ave Med, Quebec City, PQ G1V 0A6, Canada

[29] Univ Laval, Dept Phys Genie Phys & Opt, 1045 Ave Med, Quebec City, PQ G1V 0A6, Canada

[30] UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England

[31] McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada

[32] Univ Alberta, Dept Phys, Edmonton, AB T6G 2E1, Canada

[33] Univ Western Sydney, Locked Bag 1797, Penrith, NSW 2751, Australia

[34] Natl Astron Observ China, 20A Datun Rd, Beijing 100012, Peoples R China

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2017年 / 464卷 / 04期

基金：

加拿大创新基金会;

关键词：

stars: formation; dust; extinction; submillimetre: ISM; CLERK MAXWELL TELESCOPE; YOUNG STELLAR OBJECTS; INITIAL MASS FUNCTION; OPHIUCHI MAIN CLOUD; STAR-FORMATION; DENSE CORES; MOLECULAR CLOUDS; SPITZER C2D; INTERSTELLAR CLOUDS; CASSIOPEIA REGION;

D O I：

10.1093/mnras/stw2648

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present observations of the Cepheus Flare obtained as part of the James Clerk Maxwell Telescope (JCMT) Gould Belt Legacy Survey (GBLS) with the SCUBA-2 instrument. We produce a catalogue of sources found by SCUBA-2, and separate these into starless cores and protostars. We determine masses and densities for each of our sources, using source temperatures determined by the Herschel Gould Belt Survey. We compare the properties of starless cores in four different molecular clouds: L1147/58, L1172/74, L1251 and L1228. We find that the core mass functions for each region typically show shallower-than-Salpeter behaviour. We find that L1147/58 and L1228 have a high ratio of starless cores to Class II protostars, while L1251 and L1174 have a low ratio, consistent with the latter regions being more active sites of current star formation, while the former are forming stars less actively. We determine that if modelled as thermally supported Bonnor-Ebert spheres, most of our cores have stable configurations accessible to them. We estimate the external pressures on our cores using archival 13(CO) velocity dispersion measurements and find that our cores are typically pressure confined, rather than gravitationally bound. We perform a virial analysis on our cores, and find that they typically cannot be supported against collapse by internal thermal energy alone, due primarily to the measured external pressures. This suggests that the dominant mode of internal support in starless cores in the Cepheus Flare is either non-thermal motions or internal magnetic fields.

引用

页码：4255 / 4281

页数：27

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