Radio pulse search of a transitional millisecond pulsar and candidate

Millisecond pulsars exhibit diverse radiation characteristics at different evolutionary stages. Studying the radio emission phenomena of tMSPs (transitional millisecond pulsars) is of great significance for understanding the formation mechanisms and evolutionary paths of millisecond pulsars. In this study, we used the 500-m Aperture Spherical radio Telescope to observe the tMSP PSR J1023+0038 and the tMSPs candidate 3FGL J1544.6-1125, aiming to search for their radio pulse signals. The observational results show that no significant radio pulse emission was detected from either source, with the flux density upper limits being constrained to 6.5 and 5.3 upmu Jy, respectively. The research results indicate that these two sources are likely still in the accretion-powered state at present.