Poster Presentation
Giant pulses of the Crab pulsar at dual radio frequencies
Presenter: Sujin Eie (Academia Sinica Institute of Astronomy and Astrophysics/ASIAA)
The Crab pulsar is one of the best sources for studying giant pulses of radio pulsars. In this study, we investigate giant pulses from the Crab pulsar at frequencies of 2.3 GHz and 8.4 GHz through ~98-hr observations using Usuda 64-m and Kashima 34-m telescopes located in Japan. Our findings include significant numbers of giant pulses at different phases and frequencies, with negative spectral indices observed across the frequency range. Both the main pulses and interpulses at 2.3 and 8.4 GHz have power-law intensity distributions that are consistent with earlier studies. However, the power-law slopes of the intensity distributions are different between the main pulse and the interpulse at 8.4 GHz. Given that the interpulses at 8.4 GHz are mostly high-frequency interpulses, our results suggest the presence of a potential different emission mechanism for interpulses at different phases. Lastly, we present our preliminary results on the comparison of spectral indices and pulse luminosity for giant pulses, magnetar radio pulses, and fast radio bursts.
asiaa.sinica.edu.tw