The structure of knots in variable stellar jets. I - Symmetric knots

Details The structure of knots in variable stellar jets. I - Symmetric knots The structure of knots in variable stellar jets. I - Symmetric knots

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.261..573f&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 261, no. 3, p. 573-583.

Astronomy and Astrophysics

Astronomy

57

Herbig-Haro Objects, Plasma Jets, Stellar Mass Ejection, Stellar Structure, Gas Flow, Interstellar Matter

Scientific paper

Jets associated with young stars (Herbig-Haro jets) are usually composed of a series of well-aligned knots of optical emission. Recent observations show that these knots move at speeds of about 200-300 km/s, which is of the same order as the inferred fluid speed in the jets. The most obvious explanation for this is that the velocity of the jet at the source varies with time and that this leads to a series of internal working surfaces traveling down the jet (Raga et al., 1990). In this paper we present numerical simulations of the flow in one of these internal working surfaces and show that there are indeed conditions under which the knots behave as assumed by Raga et al.

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