We have performed a statistical analysis of a sample of 408 MHz variable sources with low-frequency VLBI data. The purpose of the investigation is a test of the refractive interstellar scintillation theory and the determination of parameters of the interstellar medium. We found evidence of a galactic modulation of variability events with time-scale of the order of less than one year.
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Mantovani, F., Fanti, R., Gregorini, L. et al. Interstellar medium parameters derived from low-frequency variability. Astrophys Space Sci 171, 247–249 (1990). https://doi.org/10.1007/BF00646858
- Interstellar Medium
- Variable Source
- Medium Parameter
- Variability Event
- VLBI Data