Observational Constraints on the Conservation of Momentum and Energy in Jet-Driven Molecular Outflows
- Author(s)
- Odysseas Dionatos
- Abstract
One of the longest-standing theoretical questions aiming to characterize the main outflow driving mechanisms is whether flows are driven in a momentum or energy-conserving manner. We here present a set of consistent and complete measurements of both momentum and energy for jets and outflows driven from seven protostars in the NGC 1333 star-forming region. While our observations clearly point toward an energy conservation mechanism, conservation of momentum can still be valid alternative given that jets become detectable through emission in shock interfaces, while most of the mass along the jet propagation axis is not excited and therefore remains “dark”, that is, unobserved. Recent episodic accretion/ejection models of a nested jet/outflow configuration, where the jet morphology is linked to the episodic accretion and the large scale outflow carries the bulk of the momentum from the system, may also provide convincing solutions to the observed deficit between the jet and outflow momentum.
- Organisation(s)
- Department of Astrophysics
- Volume
- 55
- Pages
- 139-143
- No. of pages
- 5
- DOI
- https://doi.org/10.1007/978-3-030-14128-8_20
- Publication date
- 01-2019
- Austrian Fields of Science 2012
- 103003 Astronomy, 103004 Astrophysics
- Keywords
- ASJC Scopus subject areas
- Nuclear and High Energy Physics, General Physics and Astronomy, Spectroscopy, Computer Science Applications, Space and Planetary Science
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/fb3c09ab-ac70-4d21-b763-8cbd3eba7690