Search for interpulses in a complete sample of pulsars at a frequency of 111 MHz

Abstract

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.

7 pages, 1 figure, 2 tables. Published in Astronomy Reports, translated by Yandex translator with correction of scientific lexis

References in corpus (7)

• 45 Years of Rotation of the Crab Pulsar
• The population of pulsars with interpulses and the implications for beam evolution
• Detection of new pulsars at the frequency 111 MHz
• On the pulse--width statistics in radio pulsars. I. Importance of the interpulse emission
• Orthogonal pulsars as a key test for pulsar evolution
• Statistics of interpulse radio pulsars - the key to solving the alignment/counter-alignment problem
• Pushchino multibeams pulsar search. IV. Detection of new pulsars at declinations -9o < δ< +55o