期刊
ASTROPHYSICAL JOURNAL LETTERS
卷 787, 期 2, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/2041-8205/787/2/L18
关键词
dust, extinction; ISM: individual objects (Perseus); stars: formation; stars: protostars
资金
- Natural Sciences and Engineering Research Council (NSERC) Canadian Graduate Student award
- Canadian Space Agency (CSA) via a Space Science Enhancement Program grant
- NSERC
- National Research Council of Canada (NRC)
- European Research Council under the European Union [291294]
- BMVIT (Austria)
- ESA-PRODEX (Belgium)
- CEA/CNES (France)
- DLR (Germany)
- ASI/INAF (Italy)
- CICYT/MCYT (Spain)
- CSA (Canada)
- NAOC (China)
- CEA (France)
- CNES (France)
- CNRS (France)
- ASI (Italy)
- MCINN (Spain)
- SNSB (Sweden)
- STFC (UK)
- NASA (USA)
- European Research Council (ERC) [291294] Funding Source: European Research Council (ERC)
We use PACS and SPIRE continuum data at 160 mu m, 250 mu m, 350 mu m, and 500 mu m from the Herschel Gould Belt Survey to sample seven clumps in Perseus: B1, B1-E, B5, IC 348, L1448, L1455, and NGC 1333. Additionally, we identify and characterize the embedded Class 0 protostars using detections of compact Herschel sources at 70 mu m as well as archival Spitzer catalogs and SCUBA 850 mu m photometric data. We identify 28 candidate Class 0 protostars, four of which are newly discovered sources not identified with Spitzer. We find that the star formation efficiency of clumps, as traced by Class 0 protostars, correlates strongly with the flatness of their respective column density distributions at high values. This correlation suggests that the fraction of high column density material in a clump reflects only its youngest protostellar population rather than its entire source population. We propose that feedback from either the formation or evolution of protostars changes the local density structure of clumps.
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