Abstract

RAGA, C.; CANTO, J.  and  CASTELLANOS-RAMIREZ, A.. Asymptotic internal working surfaces of periodically variable jets. Rev. mex. astron. astrofis [online]. 2021, vol.57, n.1, pp.147-155.  Epub Sep 30, 2021. ISSN 0185-1101.  https://doi.org/10.22201/ia.01851101p.2021.57.01.10.

We present a derivation based on the “center of mass formalism” of the asymptotic behaviour of internal working surfaces produced in a variable Herbig- Haro (HH) jet. We obtain the general solution for an arbitrary periodic ejection time-variability, and then show examples for a limited set of functional forms for the velocity and density time-evolutions. Finally, we derive a prescription for obtaining the time-averaged mass loss rate from observations of knots along an HH jet (based on the asymptotic solution), and apply it to derive the mass loss rate of the HH 1 jet.

Keywords : Herbig-Haro objects; outflows.