Search for interpulses in a complete sample of pulsars at a frequency of 111 MHz
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| Format: | Preprint |
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2025
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| _version_ | 1866913754273284096 |
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| author | Toropov, M. O. Tyul'bashev, S. A. Beskin, V. S. |
| author_facet | Toropov, M. O. Tyul'bashev, S. A. Beskin, V. S. |
| contents | An interpulse search was carried out in a sample of 96 pulsars observed on the Large Phased Array (LPA) radio telescope in the Pushchino Multibeams Pulsar Search (PUMPS). The pulsar sample is complete for pulsars having a signal-to-noise ratio (S/N) in the main pulse ($MP$) greater than 40. To search for weak interpulses ($IP$), the addition of average profiles over an interval of up to 10 years was used. Interpulses were detected in 12 pulsars (12.5\% of the sample), of which 7 pulsars have an interpulse located near the $180^o$ phase relative to the main pulse (probable orthogonal rotators), and 5 have phases far from $180^o$ (probable coaxial rotators). The amplitude ratios of $IP/MP$ are in the range of 0.004-0.023, the median value is 0.01. Estimates of the observed number of coaxial and orthogonal rotators with $IP/MP \ge 0.01$ do not contradict the model according to which, during evolution, the magnetic axis and the axis of rotation become orthogonal. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2503_18587 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Search for interpulses in a complete sample of pulsars at a frequency of 111 MHz Toropov, M. O. Tyul'bashev, S. A. Beskin, V. S. High Energy Astrophysical Phenomena An interpulse search was carried out in a sample of 96 pulsars observed on the Large Phased Array (LPA) radio telescope in the Pushchino Multibeams Pulsar Search (PUMPS). The pulsar sample is complete for pulsars having a signal-to-noise ratio (S/N) in the main pulse ($MP$) greater than 40. To search for weak interpulses ($IP$), the addition of average profiles over an interval of up to 10 years was used. Interpulses were detected in 12 pulsars (12.5\% of the sample), of which 7 pulsars have an interpulse located near the $180^o$ phase relative to the main pulse (probable orthogonal rotators), and 5 have phases far from $180^o$ (probable coaxial rotators). The amplitude ratios of $IP/MP$ are in the range of 0.004-0.023, the median value is 0.01. Estimates of the observed number of coaxial and orthogonal rotators with $IP/MP \ge 0.01$ do not contradict the model according to which, during evolution, the magnetic axis and the axis of rotation become orthogonal. |
| title | Search for interpulses in a complete sample of pulsars at a frequency of 111 MHz |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2503.18587 |