The Origin of Jets: Observational Constraints vs. Theoretical Predictions

Details The Origin of Jets: Observational Constraints vs. Theoretical Predictions The Origin of Jets: Observational Constraints vs. Theoretical Predictions

Aug 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007jena.confe..22c&link_type=abstract

"JENAM-2007, "Our non-stable Universe", held 20-25 August 2007 in Yerevan, Armenia. Abstract book, p. 22-22"

Computer Science

Scientific paper

Outflows from young accreting stars possibly include contributions from several components: (1) an inner coronal stellar wind, (2) an episodic flow from reconnection sites in the star-disk magnetopause, (3) an outer centrifugally-driven MHD disk wind. In order to investigate which of these mechanisms is the dominant source of the jets, I will review theoretical predictions for steady pressure-driven and centrifugally-driven MHD winds, and compare them with observational measurements of jet properties (poloidal speeds, rotation velocities, ejection/accretion ratio, jet widths...). It will be shown that centrifugally-driven disk winds are favored over pressure-driven winds on energetic grounds, although the range of launch radii remains uncertain. Possible clues to this issue, including comparison of jet properties across various evolutionary stages, will be also discussed.

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