Primordial mass and density segregation in a young molecular cloud
| Autor: | Emilio J. Alfaro, Carlos Román-Zúñiga |
|---|---|
| Přispěvatelé: | Ministerio de Economía y Competitividad (España), European Commission, Universidad Nacional Autónoma de México |
| Rok vydání: | 2018 |
| Předmět: |
ISM: individual objects: Pipe Nebula
Physics 010308 nuclear & particles physics Stars: formation Molecular cloud FOS: Physical sciences Astronomy Astronomy and Astrophysics ISM: clouds Astrophysics - Astrophysics of Galaxies 01 natural sciences individual objects: Pipe Nebula [ISM] Work (electrical) Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) 0103 physical sciences clouds [ISM] 010303 astronomy & astrophysics formation [Stars] Astrophysics::Galaxy Astrophysics |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| ISSN: | 1745-3933 1745-3925 |
| DOI: | 10.1093/mnrasl/sly075 |
| Popis: | We analyse the geometry of the Pipe Nebula, drawn by the distribution (Q spatial parameter) and hierarchy (Λ spatial segregation) of column density peaks previously detected and catalogued. By analysing the mass and volume density of the cores, we determine that both variables show spatial segregation with a high degree of substructure. In view of the early evolutionary state of the Pipe Nebula, our results suggest that segregation both by mass and by volume density may be primordial, in the sense of appearing early in the chain of physical processes that lead to cluster formation. We propose that volume density, and not mass, is the parameter that most clearly determines the initial spatial distribution of pre-stellar cores.© 2018 The Author(s). This work has been partially funded by the Spanish MINECO project AYA2016-75931-C2-1-P. CRZ acknowledges support from the research programme UNAM-DGAPA-PAPIIT IN108117, Mexico |
| Databáze: | OpenAIRE |
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