Search for weak components in pulsar radiation

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Resumo

The search for weak components outside the main pulse (MP) in the radiation of pulsars at a frequency of 110 MHz observed on the LPA LPI telescope in the Pushchino Multibeam Pulsar Search (PUMPS) has been carried out. The sample included 96 pulsars, for which the signal-to-noise ratio ( S/N) in the main pulse of the average profile during accumulation over 10 years was more than 40. It was found that PSR J1543+0929 has radiation for almost the entire period. The profile is three-component. The relative amplitudes of the lateral weak components are 0.013 and 0.025. For PSR J2234+2114, a precursor was detected that is 53◦ away from the MP.

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Sobre autores

T. Smirnova

Lebedev Physical Institute

Email: serg@prao.ru

Astro space center, Pushchino radio astronomy observatory

Rússia, Pushchino, Moscow reg.

M. Toropov

LLC TEK Inform

Email: serg@prao.ru
Rússia, Moscow

S. Tyul’bashev

Lebedev Physical Institute

Autor responsável pela correspondência
Email: serg@prao.ru

Astro space center, Pushchino radio astronomy observatory

Rússia, Pushchino, Moscow reg.

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2. Fig. 1. Average profiles (2883 sessions) of the pulsar J1543+0929 accumulated over 10 years are shown with a double period. The original profile is at the bottom, the same profile with the amplitude increased by 1000 times is at the top. The precursor and postcursor are clearly visible in the upper part of the figure. The arrow shows the minimum of radiation, which occupies several points in the profile. The x-axis is time in ms, the y-axis is the profile amplitude in relative units.

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3. Fig. 2. Average profiles of J1543+0929 accumulated for each of the four years. The x and axes correspond to the designations in Fig. 1.

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4. Fig. 3. Average profiles of J1543+0929 at 139.2 MHz (bottom) and 327 MHz (top), taken from the pulsar profile database (see text). The x-axis is time in ms, the y-axis is amplitude in relative units.

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5. Fig. 4. Average profiles accumulated over 10 years (3101 sessions) of J2234+2114. The x-axis is time in ms, the y-axis is profile amplitude in relative units.

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Declaração de direitos autorais © The Russian Academy of Sciences, 2024