Assessing Molecular Outflows and Turbulence in the Protostellar Cluster Serpens SouthReportar como inadecuado




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Resumen

Molecular outflows driven by protostellar cluster members likely impact their surroundings and contribute toturbulence, affecting subsequent star formation. The very young Serpens South cluster consists of a particularlyhigh density and fraction of protostars, yielding a relevant case study for protostellar outflows and their impact onthe cluster environment. We combined CO J = -1 0 observations of this region using the Combined Array forResearch in Millimeter-wave Astronomy and the Institut de Radioastronomie Millimétrique 30 m single-dishtelescope. The combined map allows us to probe CO outflows within the central, most active region at size scalesof 0.01–0.8 pc. We account for effects of line opacity and excitation temperature variations by incorporating 12COand 13CO data for the J = 1 − 0 and J = 3 − 2 transitions using Atacama Pathfinder Experiment and CaltechSubmillimeter Observatory observations for the higher CO transitions, and we calculate mass, momentum, andenergy of the molecular outflows in this region. The outflow mass-loss rate, force, and luminosity, compared withdiagnostics of turbulence and gravity, suggest that outflows drive a sufficient amount of energy to sustainturbulence, but not enough energy to substantially counter the gravitational potential energy and disrupt the clump.Further, we compare Serpens South with the slightly more evolved cluster NGC 1333, and we propose anempirical scenario for outflow-cluster interaction at different evolutionary stages.Nota general

Artículo de publicación ISI



Autor: Garay Brignardello, Guido; - Mardones Pérez, Diego; - Plunkett, Adele L.; - Arce, Héctor G.; - Corder, Stuartt A.; - Dunham, Mi

Fuente: http://repositorio.uchile.cl/



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