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Nanohertz gravitational wave astronomy during SKA era: An InPTA perspective
BHAL CHANDRA JOSHI ACHAMVEEDU GOPAKUMAR ARUL PANDIAN THIAGARAJ PRABU LANKESWAR DEY MANJARI BAGCHI SHANTANU DESAI PRATIK TARAFDAR PRERNA RANA YOGESH MAAN NEELAM DHANDA BATRA RAGHAV GIRGAONKAR NIKITA AGARWAL PARAMASIVAN ARUMUGAM AVISHEK BASU ADARSH BATHULA SUBHAJIT DANDAPAT YASHWANT GUPTA SHINNOSUKE HISANO RYO KATO DIVYANSH KHARBANDA TOMONOSUKE KIKUNAGA NEEL KOLHE M. A. KRISHNAKUMAR P. K. MANOHARAN PIYUSH MARMAT ARUN NAIDU SARMISTHA BANIK K. NOBLESON AVINASH KUMAR PALADI DHRUV PATHAK JAIKHOMBA SINGHA AMAN SRIVASTAVA MAYURESH SURNIS SAI CHAITANYA SUSARLA ABHIMANYU SUSOBHANAN1 KEITARO TAKAHASHI
SCIENTIFIC REVIEW Volume 43 Published: 8 December 2022 Article ID 0098
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Keywords
Gravitational waves ;pulsars: general ;stars: neutron ;ISM: general. -
Abstract
Decades long monitoring of millisecond pulsars, which exhibit highly stable rotational periods in pulsar timing array experiments is on the threshold of discovering nanohertz stochastic gravitational wave background. This paper describes the Indian pulsar timing array (InPTA) experiment, which employs the upgraded Giant Metrewave Radio Telescope (uGMRT) for timing an ensemble of millisecond pulsars for thispurpose. We highlight InPTA’s observation strategies and analysis methods, which are relevant for a future PTA experiment with the more sensitive Square Kilometer Array (SKA) telescope. We show that the unique multi-sub-array multi-band wide-bandwidth frequency coverage of the InPTA, provides dispersion measureestimates with unprecedented precision for PTA pulsars, e.g., $\sim$$2 \times 10^{−5}$ pc cm$^{−3}$ for PSR J1909-3744. Configuring the SKA-low and SKA-mid as two and four sub-arrays, respectively, it is shown that comparable precision is achievable, using observation strategies similar to those pursued by the InPTA, for a larger sample of 62 pulsars, requiring about 26 and 7 h per epoch for the SKA-mid and the SKA-low telescopes, respectively. We also review the ongoing efforts to develop PTA-relevant general relativistic constructs that will be required to search for nanohertz gravitational waves from isolated super-massive black hole binary systems like blazar OJ 287. These efforts should be relevant to pursue persistent multi-messenger gravitational wave astronomy during the forthcoming era of the SKA telescope, the thirty meter telescope, and the next-generation eventhorizon telescope.
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Author Affiliations
BHAL CHANDRA JOSHI1 ACHAMVEEDU GOPAKUMAR2 ARUL PANDIAN3 THIAGARAJ PRABU3 LANKESWAR DEY2 MANJARI BAGCHI4 5 SHANTANU DESAI6 PRATIK TARAFDAR4 PRERNA RANA2 YOGESH MAAN1 NEELAM DHANDA BATRA7 RAGHAV GIRGAONKAR8 NIKITA AGARWAL9 PARAMASIVAN ARUMUGAM10 AVISHEK BASU11 ADARSH BATHULA12 SUBHAJIT DANDAPAT2 YASHWANT GUPTA1 SHINNOSUKE HISANO13 RYO KATO14 15 DIVYANSH KHARBANDA6 TOMONOSUKE KIKUNAGA13 NEEL KOLHE16 M. A. KRISHNAKUMAR17 18 P. K. MANOHARAN19 PIYUSH MARMAT10 ARUN NAIDU20 SARMISTHA BANIK21 K. NOBLESON21 AVINASH KUMAR PALADI22 DHRUV PATHAK23 JAIKHOMBA SINGHA10 AMAN SRIVASTAVA6 MAYURESH SURNIS11 SAI CHAITANYA SUSARLA24 ABHIMANYU SUSOBHANAN125 KEITARO TAKAHASHI26 27
- National Centre for Radio Astrophysics (TIFR), Post Bag 3, Ganeshkhind, Pune 411007, India.
- Tata Institute of Fundamental Research, Mumbai 400005, India.
- Raman Research Institute, Bengaluru 560080, India.
- The Institute of Mathematical Sciences, CIT Campus, Taramani, Chennai 600113, India.
- Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, India.
- Department of Physics, IIT Hyderabad, Sangareddy District 5022085, India.
- Department of Physics and Astrophysics, University of Delhi, Delhi, India.
- Amity Centre of Excellence in Astrobiology, Amity University, Mumbai 410206, India.
- Manipal Institute of Technology, Manipal 576104, India.
- Department of Physics, Indian Insitute of Technology Roorkee, Roorkee 247667, India.
- Jodrell Bank Centre for Astrophysics, University of Manchester, Manchester M13 9PL, UK.
- The Indian Institute of Science Education and Research, Mohali 140306, India.
- Graduate School of Science and Technology, Kumamoto University, Kumamoto 8608555, Japan.
- Faculty of Advanced Science and Technology, Kumamoto University, Kumamoto 8608555, Japan.
- Osaka City University Advanced Mathematical Institute, Osaka 5588585, Japan
- Department of Physics, St.Xavier’s College Autonomous, Mumbai 400001, India.
- Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany.
- Fakultät für Physik, Universität Bielefeld, Universitätsstr. 25, 33615 Bielefeld, Germany.
- Arecibo Observatory, University of Central Florida, Arecibo 00612, USA.
- Department of Physics, University of Oxford, Deny’s Wilkinson Building, Keble Road, Oxford OX1 3RH, UK.
- Department of Physics, BITS Pilani Hyderabad Campus, Hyderabad 500078, India.
- Indian Institute of Space Science and Technology, Thiruvananthapuram 695547, India.
- Inter-University Centre for Astronomy and Astrophysics (IUCAA), Pune 411007, India.
- School of Mathematics, National University of Ireland, Galway University Road, Galway H91TK33, Ireland.
- National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China.
- Faculty of Advanced Science and Technology, Kumamoto University, Kumamoto, Japan.
- International Research Organization for Advanced Science and Technology, Kumamoto University, Kumamoto, Japan.
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Dates
- Published
- 8 December 2022
- Manuscript received
- 1 April 2022
- Accepted
- 17 May 2022
- Final version published online
- 8 December 2022
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Journal of Astrophysics and Astronomy
Volume 44, 2023
All articles
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Journal of Astrophysics and Astronomy | News
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Continuous Article Publication
Posted on January 27, 2016Since January 2016, the Journal of Astrophysics and Astronomy has moved to Continuous Article Publishing (CAP) mode. This means that each accepted article is being published immediately online with DOI and article citation ID with starting page number 1. Articles are also visible in Web of Science immediately. All these have helped shorten the publication time and have improved the visibility of the articles.
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Editorial Note on Continuous Article Publication
Posted on July 25, 2019Click here for Editorial Note on CAP Mode
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