2 v 1 1 M ay 2 00 3 The issue of aliasing in PSR B 0943 + 10 I Limitations of the physical model
نویسنده
چکیده
Deshpande & Rankin (1999, 2001) claim that the frequency of the very narrow feature, in the spectrum of radio flux variations of PSR B0943+10, is an alias of its actual value. For this, they need to interpret the narrow feature as a very stable pattern of drifting sub pulses on the polar cap of this pulsar, within the framework of the Ruderman & Sutherland (1975) model. This paper discusses several factors within the same framework, that may perturb a very steady pattern of drifting sub pulses, leading to a broadening of the spectral feature. One should be cautious in (1) identifying such very narrow spectral features with a very stable pattern of drifting sub pulses, and (2) use this picture to resolve the issue of aliasing in PSR B0943+10.
منابع مشابه
ar X iv : a st ro - p h / 03 05 01 3 v 1 1 M ay 2 00 3 The issue of aliasing in PSR B 0943 + 10 II Signal processing arguments
Deshpande & Rankin (1999, 2001) claim that the frequency of the very narrow feature, in the spectrum of radio flux variations of PSR B0943+10, is an alias of its actual value. They also claim to have detected an amplitude modulation on the above phase modulation. This paper argues that both these claims are unjustified.
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