dispersion measure

(DM) The number of electrons per unit volume, n _e, integrated along the line of sight to a source: DM = n _e dl

where dl is an element of the path. It is the factor that determines, for example, the time delay (i.e. dispersion) between the arrival of radio pulses from a pulsar at two different frequencies. The value of n _e in the plane of our Galaxy is typically 0.03 cm^–3.

dispersion measure

[də′spər·zhən ‚mezh·ər] (astronomy) A quantity that describes the dispersion of a radio signal, proportional to the product of the density of interstellar electrons and the distance to the source.

单词	dispersion measure
释义	dispersion measure dispersion measure (DM) The number of electrons per unit volume, n _e, integrated along the line of sight to a source: DM = n _e dl where dl is an element of the path. It is the factor that determines, for example, the time delay (i.e. dispersion) between the arrival of radio pulses from a pulsar at two different frequencies. The value of n _e in the plane of our Galaxy is typically 0.03 cm^–3. dispersion measure [də′spər·zhən ‚mezh·ər] (astronomy) A quantity that describes the dispersion of a radio signal, proportional to the product of the density of interstellar electrons and the distance to the source. AcronymsSeedemister
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