학술논문
Search for long-period pulsars with the GMRT: Discovery of nulling in two pulsars
Document Type
Conference
Source
2023 XXXVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS) General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS), 2023 XXXVth. :1-4 Aug, 2023
Subject
Language
ISSN
2642-4339
Abstract
The process of coherent radio emission from pulsars poses many important questions in the field of astrophysics that are not fully understood yet. Features seen in the pulsed emission are the main probes to the actual physics of radio emission from these objects. Nulling is one of these important emission features in which radio emission from pulsars stops for a duration ranging between a few periods to a few tens of minutes or even hours and then starts again. Any emission model that attempts to explain pulsar radio emission has to explain this peculiar phenomenon of stopping and restarting radio emission. In this paper, we present nulling in two long period pulsars discovered in the GHRSS survey with the uGMRT. One of these pulsars, PSRJ1937-2937 shows long nulls. We test the effciency of periodicity search methods to find pulsars with long nulls using several epochs of observation of PSR J1937-2937. We also present the nulling properties of pulsar J1244-4708.