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The JCMT gould belt survey : evidence for radiative heating in serpens MWC 297 and its influence on local star formation

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Date
01/04/2015
Author
Rumble, D.
Hatchell, J.
Gutermuth, R.A.
Kirk, H.
Buckle, J.
Beaulieu, S.F.
Berry, D.S.
Broekhoven-Fiene, H.
Currie, M.J.
Fich, M.
Jenness, T.
Johnstone, D.
Mottram, J.C.
Nutter, D.
Pattle, K.
Pineda, J.E.
Quinn, C.
Salji, C.
Tisi, S.
Walker-Smith, S.
Di Francesco, J.
Hogerheijde, M.R.
Ward-Thompson, D.
Allen, L.E.
Cieza, L.A.
Dunham, M.M.
Harvey, P.M.
Stapelfeldt, K.R.
Bastien, P.
Butner, H.
Chen, M.
Chrysostomou, A.
Coude, S.
Davis, C.J.
Drabek-Maunder, E.
Duarte-Cabral, A.
Fiege, J.
Friberg, P.
Friesen, R.
Fuller, G.A.
Graves, S.
Greaves, J.
Gregson, J.
Holland, W.
Joncas, G.
Kirk, J.M.
Knee, L.B.G.
Mairs, S.
Marsh, K.
Matthews, B.C.
Moriarty-Schieven, G.
Rawlings, J.
Richer, J.
Robertson, D.
Rosolowsky, E.
Sadavoy, S.
Thomas, H.
Tothill, N.
Viti, S.
White, G.J.
Wilson, C.D.
Wouterloot, J.
Yates, J.
Zhu, M.
Keywords
Radiative transfer
Catalogues
Stars: formation
Stars: protostars
HII regions
Submillimetre: general
QC Physics
QB Astronomy
3rd-DAS
Metadata
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Abstract
We present SCUBA-2 450 and 850 μm observations of the Serpens MWC 297 region, part of the James Clerk Maxwell Telescope (JCMT) Gould Belt Survey of nearby star-forming regions. Simulations suggest that radiative feedback influences the star formation process and we investigate observational evidence for this by constructing temperature maps. Maps are derived from the ratio of SCUBA-2 fluxes and a two-component model of the JCMTbeam for a fixed dust opacity spectral index of β = 1.8.Within 40 arcsec of the B1.5Ve Herbig star MWC 297, the submillimetre fluxes are contaminated by free-free emission with a spectral index of 1.03 ± 0.02, consistent with an ultracompact HII region and polar winds/jets. Contamination accounts for 73 ± 5 per cent and 82 ± 4 per cent of peak flux at 450 μm and 850 μm, respectively. The residual thermal disc of the star is almost undetectable at these wavelengths. Young stellar objects (YSOs) are confirmed where SCUBA-2 850 μm clumps identified by the FELLWALKER algorithm coincide with Spitzer Gould Belt Survey detections. We identify 23 objects and use Tbol to classify nine YSOs with masses 0.09 to 5.1M⊙. We find two Class 0, one Class 0/I, three Class I and three Class II sources. The mean temperature is 15 ± 2 K for the nine YSOs and 32 ± 4 K for the 14 starless clumps. We observe a starless clump with an abnormally high mean temperature of 46 ± 2 K and conclude that it is radiatively heated by the star MWC 297. Jeans stability provides evidence that radiative heating by the star MWC 297 may be suppressing clump collapse.
Citation
Rumble , D , Hatchell , J , Gutermuth , R A , Kirk , H , Buckle , J , Beaulieu , S F , Berry , D S , Broekhoven-Fiene , H , Currie , M J , Fich , M , Jenness , T , Johnstone , D , Mottram , J C , Nutter , D , Pattle , K , Pineda , J E , Quinn , C , Salji , C , Tisi , S , Walker-Smith , S , Di Francesco , J , Hogerheijde , M R , Ward-Thompson , D , Allen , L E , Cieza , L A , Dunham , M M , Harvey , P M , Stapelfeldt , K R , Bastien , P , Butner , H , Chen , M , Chrysostomou , A , Coude , S , Davis , C J , Drabek-Maunder , E , Duarte-Cabral , A , Fiege , J , Friberg , P , Friesen , R , Fuller , G A , Graves , S , Greaves , J , Gregson , J , Holland , W , Joncas , G , Kirk , J M , Knee , L B G , Mairs , S , Marsh , K , Matthews , B C , Moriarty-Schieven , G , Rawlings , J , Richer , J , Robertson , D , Rosolowsky , E , Sadavoy , S , Thomas , H , Tothill , N , Viti , S , White , G J , Wilson , C D , Wouterloot , J , Yates , J & Zhu , M 2015 , ' The JCMT gould belt survey : evidence for radiative heating in serpens MWC 297 and its influence on local star formation ' , Monthly Notices of the Royal Astronomical Society , vol. 448 , no. 2 , pp. 1551-1573 . https://doi.org/10.1093/mnras/stu2695
Publication
Monthly Notices of the Royal Astronomical Society
Status
Peer reviewed
DOI
https://doi.org/10.1093/mnras/stu2695
ISSN
0035-8711
Type
Journal article
Rights
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society, © 2015 The Authors, Published by Oxford University Press on behalf of the Royal Astronomical Society
Collections
  • University of St Andrews Research
URL
http://mnras.oxfordjournals.org/content/448/2/1551/suppl/DC1
URI
http://hdl.handle.net/10023/6489

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