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Statistical Properties of Pulsars with the Gigahertz-Peaked Spectra

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Abstract

Pulsars with the Gigahertz-Peaked Spectra (GPS) are named GPS pulsars, which means that spectra of the pulsars in the radio band turn over near 1 GHz. These pulsars are also called high-frequency inversion spectra pulsars. There are total 33 GPS pulsars discovered so far. The reason causing the turned-over spectra may be due to the free–free absorption of radio emission by the interstellar medium. We carry out the statistical research on the peak frequencies of inversion spectra, spectral indices, dispersion measure, and magnetic fields of these GPS pulsars. We find that the peak frequencies of most GPS pulsars are mainly in 0.5–1.0 GHz, the spectral indices of these GPS pulsars seems to have a bimodal distribution, which means that these GPS pulsars are possibly composed by two types of pulsars. A strong positive correlation between the periods and dispersion measure (DM) of GPS pulsars is first found.

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Authors and Affiliations

  1. JSNU SPBPU Institute of Engineering and SINO RUSSIAN Institute, Jiangsu Normal University, Xuzhou, China

    Jinyi Li, Hongbing Cai & Beibei Wang

  2. School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou, China

    Li Chen

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  1. Jinyi Li
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  2. Hongbing Cai
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  3. Li Chen
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Correspondence to Hongbing Cai or Li Chen.

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Li, J., Cai, H., Chen, L. et al. Statistical Properties of Pulsars with the Gigahertz-Peaked Spectra. Astron. Rep. 67, 837–845 (2023). https://doi.org/10.1134/S1063772923080061

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