Kinematics of the HH 111 Jet from the Space Telescope Imaging Spectrograph

Details Kinematics of the HH 111 Jet from the Space Telescope Imaging Spectrograph Kinematics of the HH 111 Jet from the Space Telescope Imaging Spectrograph

Jan 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002apj...565l..29r&link_type=abstract

The Astrophysical Journal, Volume 565, Issue 1, pp. L29-L33.

Astronomy and Astrophysics

Astronomy

16

Ism: Herbig-Haro Objects, Ism: Individual: Alphanumeric: Hh 111, Ism: Jets And Outflows, Ism: Kinematics And Dynamics, Shock Waves

Scientific paper

We present a long-slit spectrum of the Herbig-Haro object HH 111, obtained with the Space Telescope Imaging Spectrograph on board the Hubble Space Telescope. This spectrum has a spectral resolution of ~50 km s-1, so it gives a good picture of the kinematical properties of the observed object at very high angular resolution. We find that some of the knots along the jet are associated with sudden drops in the radial velocity (modulus), confirming that the emission from the knots is formed in shocks. We interpret the observed position-velocity diagrams in terms of a model of a jet from a variable source, and we attempt to carry out a reconstruction of the ejection velocity variability necessary for reproducing the observed kinematical structure. Based on observations made with the NASA/ESA Hubble Space Telescope obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research, Inc., under NASA contract NAS 5-26555.

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