From filamentary clouds to prestellar cores to the stellar IMF: Initial highlights from the<i>Herschel</i>Gould Belt Survey
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Abstract
We summarize the first results from the Gould Belt Survey, obtained toward the Aquila rift and Polaris Flare regions during the science demonstration phase of <i>Herschel<i/>. Our 70–500 <i>μ<i/>m images taken in parallel mode with the SPIRE and PACS cameras reveal a wealth of filamentary structure, as well as numerous dense cores embedded in the filaments. Between ~350 and 500 prestellar cores and ~45–60 Class 0 protostars can be identified in the Aquila field, while ~300 unbound starless cores and no protostars are observed in the Polaris field. The prestellar core mass function (CMF) derived for the Aquila region bears a strong resemblance to the stellar initial mass function (IMF), already confirming the close connection between the CMF and the IMF with much better statistics than earlier studies. Comparing and contrasting our <i>Herschel<i/> results in Aquila and Polaris, we propose an observationally-driven scenario for core formation according to which complex networks of long, thin filaments form first within molecular clouds, and then the densest filaments fragment into a number of prestellar cores via gravitational instability.
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The record
- Venue
- Astronomy and Astrophysics
- Topic
- Astrophysics and Star Formation Studies
- Field
- Physics and Astronomy
- Canadian institutions
- Canadian Institute for Theoretical AstrophysicsMcMaster UniversityHerzberg Institute of Astrophysics
- Funders
- National Astronomical Observatories, Chinese Academy of SciencesMax-Planck-Institut für AstronomieScience and Technology Facilities CouncilBundesministerium für Verkehr, Innovation und TechnologieCentre National de la Recherche ScientifiqueKU LeuvenNational Aeronautics and Space AdministrationCalifornia Institute of TechnologyImperial College LondonCentre National d’Etudes Spatiales
- Keywords
- ProtostarStar formationCore (optical fiber)Molecular cloudInitial mass functionYoung stellar objectFlareCircumstellar disk
- Has abstract in OpenAlex
- yes