Special Issue for Stars and interstellar medium

Radio pulsars with expected gamma radiation and gamma-ray pulsars as pulsating radio emitters

Igor Fedorovich Malov, Maria Andreevna Timirkeeva


Abstract Pulsars play a crucial astrophysical role as highly energetic compact radio, X-ray and gamma-ray sources. Our previous works show that radio pulsars identified as pulsing gamma-ray sources by the Large Area Telescope (LAT) on board the Fermi Gamma-Ray Space Telescope have high values of magnetic field near the light cylinder, two-three orders of magnitude stronger compared with the magnetic fields of radio pulsars: log Blc (G) are 3.60–3.95 and 1.75 correspondingly. Moreover, their losses of rotational energy are also three orders higher than the corresponding values for the main group of radio pulsars on average: log Ė (erg s−1) = 35.37–35.53 and 32.64. The correlation between gamma-ray luminosities and radio luminosities is found. It allows us to select those objects from all sets of known radio pulsars that can be detected as gamma-ray pulsars with high probability. We provide a list of such radio pulsars and propose to search for gamma emission from these objects. On the other hand, the known catalog of gamma-ray pulsars contains some sources which are not currently identified as radio pulsars. Some of them have large values of gamma-ray luminosities and according to the obtained correlation, we can expect marked radio emission from these objects. We give the list of such pulsars and expected flux densities to search for radiation at frequencies 1400 and 111 MHz.


Keywords pulsars: individual — gamma-ray bursts: individual — stars: magnetic field

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