Speaker
Description
Rotating Radio Transients (RRATS) are a class of pulsars that were identified in 2006 by McLaughlin et al. Unlike canonical pulsars, which are characterized by regular pulses that are detectable by Fourier transform periodicity searches, RRATs emit pulses sporadically and are best detected by single-pulse searches.
J1819-1458, a galactic RRAT with a dispersion measure (DM) of 196, is the brightest and best-studied such object. It has a period of 4.9 s and an average burst rate of one every 4 minutes, with peak flux densities of 0.1 - 3.6 Jy. It has three distinct emission phases within a single period, which may be related to the different emission zones of the star. It is the only RRAT that has exhibited glitches, resulting in sudden changes to its period. However, this has not been observed since 2009.
In this poster, I will present results from my Master’s research findings on J1819-1458, using data from the MeerTRAP commensal survey on the MeerKAT telescope. This includes a refined timing solution, an analysis of the distribution of the timing residuals, and the flux intensity distribution of the observed bursts. The timing solution spans multiple years and shows that the RRAT has been stable for over 17 years. The pulses are also highly variable; I investigate relationships between variations in pulse energy, pulse width, time-of-arrival, spectral index, and morphology that are suggestive of RRAT emission mechanisms.
| Consent on use of personal information: Abstract Submission | Yes, I ACCEPT |
|---|