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astro-ph1997
Hydrodynamical instability of extragalactic stratified jets
M. Hanasz, H. Sol
The recent development of tomographic analysis of radio data shows the presence of sheaths around several extragalactic jets. We have studied the Kelvin-Helmholtz instability of su…
astro-ph1997
Oxygen-rich Mira variables: near-infrared luminosity calibrations. Populations and period-luminosity relations
R. Alvarez, M-O. Mennessier, D. Barthes +2
HIPPARCOS astrometric and kinematical data of oxygen-rich Mira variables are used to calibrate absolute near-infrared magnitudes and kinematic parameters. Two sets of near-infrared…