Evidence for profile changes in PSR J1713+0747 using the uGMRT-Reference-Cited by-同舟云学术

Evidence for profile changes in PSR J1713+0747 using the uGMRT

Published:2021-08-23 Issue:1 Volume:507 Page:L57-L61
ISSN:1745-3925
Container-title:Monthly Notices of the Royal Astronomical Society: Letters
language:en
Short-container-title:

Author:

Singha Jaikhomba¹^ORCID,Surnis Mayuresh P²^ORCID,Joshi Bhal Chandra³^ORCID,Tarafdar Pratik⁴^ORCID,Rana Prerna⁵^ORCID,Susobhanan Abhimanyu⁵^ORCID,Girgaonkar Raghav⁶^ORCID,Kolhe Neel⁷^ORCID,Agarwal Nikita⁸^ORCID,Desai Shantanu⁶^ORCID,Prabu T⁹^ORCID,Bathula Adarsh¹⁰^ORCID,Dandapat Subhajit⁵^ORCID,Dey Lankeswar⁵^ORCID,Hisano Shinnosuke¹¹^ORCID,Kato Ryo¹²^ORCID,Kharbanda Divyansh⁶^ORCID,Kikunaga Tomonosuke¹¹^ORCID,Marmat Piyush¹^ORCID,Susarla Sai Chaitanya¹³^ORCID,Bagchi Manjari⁴¹⁴^ORCID,Dhanda Batra Neelam¹⁵^ORCID,Choudhury Arpita⁴^ORCID,Gopakumar A⁵^ORCID,Gupta Yashwant³^ORCID,Krishnakumar M A¹⁶^ORCID,Maan Yogesh³^ORCID,Manoharan P K¹⁷^ORCID,Nobleson K¹⁸^ORCID,Pandian Arul⁹^ORCID,Pathak Dhruv⁴¹⁴^ORCID,Takahashi Keitaro¹¹¹⁹²⁰^ORCID

Affiliation:

1. Department of Physics, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India

2. Jodrell Bank Centre for Astrophysics, Department of Physics and Astronomy, The University of Manchester, Manchester, M13 9PL, UK

3. National Centre for Radio Astrophysics, Tata Institute of Fundamental Research, Pune 411007, Maharashtra, India

4. The Institute of Mathematical Sciences, CIT Campus, Taramani, Chennai 600113, Tamil Nadu, India

5. Department of Astronomy and Astrophysics, Tata Institute of Fundamental Research, Mumbai 400005, Maharashtra, India

6. Department of Physics, Indian Institute of Technology Hyderabad, Kandi, Telangana 502285, India

7. Department of Physics, St. Xavier’s College (Autonomous), Mumbai 400001, Maharashtra, India

8. Department of Electronics and Communication Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India

9. Raman Research Institute, Bengaluru 560080, Karnataka, India

10. Department of Physics, Indian Institute of Science Education and Research Mohali, Sector 81, Punjab 140306, India

11. Kumamoto University, Graduate School of Science and Technology, Kumamoto, 860-8555, Japan

12. Osaka City University Advanced Mathematical Institute, 3-3-138, Sugimoto, Sumiyoshi-ku, Osaka, 558-8585, Japan

13. School of Physics, Indian Institute of Science Education and Research Thiruvananthapuram, Vithura, Thiruvananthapuram 695551, Kerala, India

14. Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, Maharashtra, India

15. Department of Physics, Indian Institute of Technology Delhi, New Delhi-110016, India

16. Fakultät für Physik, Universität Bielefeld, Postfach 100131, D-33501 Bielefeld, Germany

17. Arecibo Observatory, University of Central Florida, Arecibo, PR 00612, USA

18. Department of Physics, BITS Pilani Hyderabad Campus, Hyderabad 500078, Telangana, India

19. International Research Organization for Advanced Science and Technology, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan

20. National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan

Abstract

ABSTRACT 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 ∼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 ∼ν+1.34.

Funder

European Research Council

Department of Atomic Energy, Government of India

Department of Science & Technology

JSPS

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

Link

http://academic.oup.com/mnrasl/advance-article-pdf/doi/10.1093/mnrasl/slab098/39849591/slab098.pdf

Reference43 articles.