Chen, Michael Chun-Yuan, Di Francesco, J., Johnstone, D., Sadavoy, S., Hatchell, J., Mottram, J. C., Kirk, H., Buckle, J., Berry, D. S., Broekhoven-Fiene, H., Currie, M. J., Fich, M., Jenness, T., Nutter, D., Pattle, K., Pineda, J. E., Quinn, C., Salji, C., Tisi, S., Hogerheijde, M. R., Ward-Thompson, D., Bastien, P., Bresnahan, D., Butner, H., 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., Mowat, C., Pezzuto, S., Rawlings, J., Richer, J., Robertson, D., Rosolowsky, E., Rumble, D., Schneider-Bontemps, N., Thomas, H., Tothill, N., Viti, S., White, G. J., Wouterloot, J., Yates, J. and Zhu, M. (2016). THE JCMT GOULD BELT SURVEY: EVIDENCE FOR DUST GRAIN EVOLUTION IN PERSEUS STAR-FORMING CLUMPS. Astrophys. J., 826 (1). BRISTOL: IOP PUBLISHING LTD. ISSN 1538-4357

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Abstract

The dust emissivity spectral index, beta, is a critical parameter for deriving the mass and temperature of star-forming structures and, consequently, their gravitational stability. The beta value is dependent on various dust grain properties, such as size, porosity, and surface composition, and is expected to vary as dust grains evolve. Here we present beta, dust temperature, and optical depth maps of the star-forming clumps in the Perseus Molecular Cloud determined from fitting spectral energy distributions to combined Herschel and JCMT observations in the 160, 250, 350, 500, and 850 mu m bands. Most of the derived beta and dust temperature values fall within the ranges of 1.0-2.7 and 8-20 K, respectively. In Perseus, we find the beta distribution differs significantly from clump to clump, indicative of grain growth. Furthermore, we also see significant localized beta variations within individual clumps and find low-beta regions correlate with local temperature peaks, hinting at the possible origins of low-beta grains. Throughout Perseus, we also see indications of heating from B stars and embedded protostars, as well evidence of outflows shaping the local landscape.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Chen, Michael Chun-YuanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Di Francesco, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Johnstone, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sadavoy, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hatchell, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mottram, J. C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kirk, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Buckle, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Berry, D. S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Broekhoven-Fiene, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Currie, M. J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fich, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jenness, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nutter, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pattle, K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pineda, J. E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Quinn, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Salji, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Tisi, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hogerheijde, M. R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ward-Thompson, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bastien, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bresnahan, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Butner, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Chrysostomou, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Coude, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Davis, C. J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Drabek-Maunder, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Duarte-Cabral, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fiege, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Friberg, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Friesen, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fuller, G. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Graves, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Greaves, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gregson, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Holland, W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Joncas, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kirk, J. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Knee, L. B. G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mairs, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Marsh, K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Matthews, B. C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Moriarty-Schieven, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mowat, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pezzuto, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rawlings, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Richer, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Robertson, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rosolowsky, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rumble, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schneider-Bontemps, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Thomas, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Tothill, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Viti, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
White, G. J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wouterloot, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Yates, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Zhu, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-269736
DOI: 10.3847/0004-637X/826/1/95
Journal or Publication Title: Astrophys. J.
Volume: 826
Number: 1
Date: 2016
Publisher: IOP PUBLISHING LTD
Place of Publication: BRISTOL
ISSN: 1538-4357
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
SPECTRAL ENERGY-DISTRIBUTIONS; TEMPERATURE-DEPENDENCE; ABSORPTION-COEFFICIENT; PROTOSTELLAR ENVELOPES; YOUNGEST PROTOSTARS; MOLECULAR CLOUD; DENSE CORES; MAP-MAKING; HERSCHEL; SUBMILLIMETERMultiple languages
Astronomy & AstrophysicsMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/26973

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