The velocity of pulsars and interstellar irregularities in the scintillation pattern |
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| Authors: | N A Lotova I V Chashey |
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| Institution: | (1) P. N. Lebedev Physical Institute of the U.S.S.R. Academy of Sciences, Moscow, USSR |
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| Abstract: | The scintillation theory is developed for application to the interstellar medium taking into account both the movement of the pulsars and the movement of the interstellar irregularities.It is shown that the velocity of the drifting pattern differs essentially from that for the pulsars. This difference is due to the medium extent effect and to the motion of the irregularities. The pulsar velocityv
0 and the parameters of the motion of the irregularities (
,  ) can be derived from the obtained formulae, using the known parameters of the cross-correlation function of scintillations (V
ef,  1,S).In contrast with the interplanetary scintillation, the asymmetry of the form of the cross-correlation function of the interstellar scintillations is caused not only by the motion of the interstellar irregularities, but also by the movement of the source itself. |
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