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- TL;DR
- One possible reason for the instability of pulsar radiation is the effect of the interstellar medium on radio wave propagation. Could this factor (the strength of its effect) be an unknown quantitative parameter that determines the radius at which we can detect artificial alien signals?
One possible reason for the instability of pulsar radiation is the effect of the interstellar medium on radio wave propagation: "When pulsar signals propagate through the turbulent, ionized interstellar medium, they scatter, causing the signal to 'twinkle' like starlight. This causes random, time-dependent variations in flux density." The greater the distance, the stronger the influence of the interstellar medium. Could this factor (the strength of its effect) be an unknown quantitative parameter that determines the radius at which we can detect artificial alien signals? Unfortunately, it's difficult to find information on the radiation of specific neutron stars online. But if it turns out that the stability of their radiation pulses is strongly dependent on the distance from the star (decreasing with increasing distance), this could be evidence of significant distortion. I think scientists could study this issue, if it hasn't already been explored.