期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 507, 期 1, 页码 L57-L61出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnrasl/slab098
关键词
pulsars: general; pulsars: individual: (PSR J1713+0747)
资金
- European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme [694745]
- Department of Atomic Energy, Government of India [RTI4002, 12-RD-TFR-5.02-0700]
- Women's Scientist scheme (WOS-A), Department of Science & Technology, India
- Department of Science & Technology, Government of India [SR/WOS-A/PM-1031/2014]
- JSPS KAKENHI [20J20509, 20H00180, 21H01130, 21H04467]
- Bilateral Joint Research Projects of JSPS
- ISM Cooperative Research Program [2021-ISMCRP-2017]
- Grants-in-Aid for Scientific Research [20J20509, 21H04467, 21H01130] Funding Source: KAKEN
PSR J1713+0747 is one of the most precisely timed pulsars in the international pulsar timing array experiment, with recent observations showing an abrupt profile shape change. The study indicates that the disturbance accompanying this pulsar's change is followed by a recovery on a timescale of approximately 159 days.
PSR J1713+0747 is one of the most precisely timed pulsars in the international pulsar timing array experiment. This pulsar showed an abrupt profile shape change between 2021 April 16, (MJD 59320) and 2021 April 17 (MJD 59321). In this paper, we report the results from multi-frequency observations of this pulsar carried out with the upgraded Giant Metrewave Radio Telescope (uGMRT) before and after the event. We demonstrate the profile change seen in Band 5 (1260 MHz-1460 MHz) and Band 3 (300 MHz-500 MHz). The timing analysis of this pulsar shows a disturbance accompanying this profile change followed by a recovery with a time-scale of similar to 159 days. Our data suggest that a model with chromatic index as a free parameter is preferred over models with combinations of achromaticity with DM bump or scattering bump. We determine the frequency dependence to be similar to nu(+1.34).
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