Simulations of evolving or outbursting molecular protostellar jets

Rosen, A. and Smith, M.D. (2003) Simulations of evolving or outbursting molecular protostellar jets. Monthly Notices of the Royal Astronomical Society, 343 (1). pp. 181-191. ISSN 0035-8711. (doi:https://doi.org/10.1046/j.1365-8711.2003.06654.x) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Official URL
http://dx.doi.org/10.1046/j.1365-8711.2003.06654.x

Abstract

The kinematic and radiative power of molecular jets is expected to change as a protostar undergoes permanent or repeated changes in the rate at which it accretes. We study here the consequences of evolving jet power on the spatial and velocity structure, as well as the fluxes, of molecular emission from the bipolar outflow. We consider a jet of rapidly increasing density and a jet in which the mass input is abruptly cut off. We perform three-dimensional hydrodynamic simulations with atomic and molecular cooling and chemistry. In this work, highly collimated and sheared jets are assumed. We find that position-velocity diagrams, velocity-channel maps and the relative H 2 and CO fluxes are potentially the best indicators of the evolutionary stage. In particular, the velocity width of the CO lines may prove most reliable, although the oftenquoted mass-velocity power-law index is probably not. We demonstrate how the relative H2 1-0 S(1) and CO J = 1-0 fluxes evolve and apply this to interpret the phase of several outflows.

Item Type: Article
Uncontrolled keywords: Hydrodynamics, ISM: clouds, ISM: jets and outflows, ISM: molecules, Shock waves
Subjects: Q Science > QB Astronomy > QB460 Astrophysics
Divisions: Faculties > Sciences > School of Physical Sciences > Centre for Astrophysics and Planetary Sciences
Depositing User: Giles Tarver
Date Deposited: 11 Aug 2015 09:58 UTC
Last Modified: 12 Aug 2015 14:16 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/50127 (The current URI for this page, for reference purposes)
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