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Black Hole

Lensing of space time around a black hole. At Oxford we study black holes observationally and theoretically on all size and time scales - it is some of our core work.

Credit: ALAIN RIAZUELO, IAP/UPMC/CNRS. CLICK HERE TO VIEW MORE IMAGES.

Arun Kumar Naidu

Senior Software Architect for Time Domain Radio Astronomy and SKA construction

Sub department

  • Astrophysics
arun.naidu@physics.ox.ac.uk
Telephone: 01865 273364
Denys Wilkinson Building, room 603D
  • About
  • Publications

High-performance computing for SKA transient search: Use of FPGA-based accelerators

Journal of Astrophysics and Astronomy Springer Nature 44:1 (2023) 11

Authors:

R Aafreen, R Abhishek, B Ajithkumar, Arunkumar M Vaidyanathan, Indrajit V Barve, Sahana Bhattramakki, Shashank Bhat, BS Girish, Atul Ghalame, Y Gupta, Harshal G Hayatnagarkar, PA Kamini, A Karastergiou, L Levin, S Madhavi, M Mekhala, M Mickaliger, V Mugundhan, Arun Naidu, J Oppermann, B Arul Pandian, N Patra, A Raghunathan, Jayanta Roy, Shiv Sethi, B Shaw, K Sherwin, O Sinnen, SK Sinha, KS Srivani, B Stappers, CR Subrahmanya, Thiagaraj Prabu, C Vinutha, YG Wadadekar, Haomiao Wang, C Williams
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Erratum: “The First CHIME/FRB Fast Radio Burst Catalog” (2021, ApJS, 257, 59)

The Astrophysical Journal Supplement Series American Astronomical Society 264:2 (2023) 53

Authors:

The CHIME FRB Collaboration, Mandana Amiri, Bridget C Andersen, Kevin Bandura, Sabrina Berger, Mohit Bhardwaj, Michelle M Boyce, PJ Boyle, Charanjot Brar, Daniela Breitman, Tomas Cassanelli, Pragya Chawla, Tianyue Chen, J-F Cliche, Amanda Cook, Davor Cubranic, Alice P Curtin, Meiling Deng, Matt Dobbs, Fengqiu Dong, Gwendolyn Eadie, Mateus Fandino, Emmanuel Fonseca, BM Gaensler, Utkarsh Giri, Deborah C Good, Mark Halpern, Alex S Hill, Gary Hinshaw, Alexander Josephy, Jane F Kaczmarek, Zarif Kader, Joseph W Kania, Victoria M Kaspi, TL Landecker, Dustin Lang, Calvin Leung, Dongzi Li, Hsiu-Hsien Lin, Kiyoshi W Masui, Ryan Mckinven, Juan Mena-Parra, Marcus Merryfield, Bradley W Meyers, Daniele Michilli, Nikola Milutinovic, Arash Mirhosseini, Moritz Münchmeyer, Arun Naidu, Laura Newburgh, Cherry Ng, Chitrang Patel, Ue-Li Pen, Emily Petroff, Tristan Pinsonneault-Marotte, Ziggy Pleunis, Masoud Rafiei-Ravandi, Mubdi Rahman, Scott M Ransom, Andre Renard, Pranav Sanghavi, Paul Scholz, J Richard Shaw, Kaitlyn Shin, Seth R Siegel, Andrew E Sikora, Saurabh Singh, Kendrick M Smith, Ingrid Stairs, Chia Min Tan, SP Tendulkar, Keith Vanderlinde, Haochen Wang, Dallas Wulf, AV Zwaniga
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CHIME Discovery of a Binary Pulsar with a Massive Nondegenerate Companion

The Astrophysical Journal American Astronomical Society 943:1 (2023) 57

Authors:

Bridget C Andersen, Emmanuel Fonseca, JW McKee, BW Meyers, Jing Luo, CM Tan, IH Stairs, Victoria M Kaspi, MH van Kerkwijk, Mohit Bhardwaj, PJ Boyle, Kathryn Crowter, Paul B Demorest, Fengqiu A Dong, Deborah C Good, Jane F Kaczmarek, Calvin Leung, Kiyoshi W Masui, Arun Naidu, Cherry Ng, Chitrang Patel, Aaron B Pearlman, Ziggy Pleunis, Masoud Rafiei-Ravandi, Mubdi Rahman, Scott M Ransom, Kendrick M Smith, Shriharsh P Tendulkar
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Nanohertz gravitational wave astronomy during SKA era: An InPTA perspective

Journal of Astrophysics and Astronomy Springer Nature 43:2 (2022) 98

Authors:

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, MA Krishnakumar, PK Manoharan, Piyush Marmat, Arun Naidu, Sarmistha Banik, K Nobleson, Avinash Kumar Paladi, Dhruv Pathak, Jaikhomba Singha, Aman Srivastava, Mayuresh Surnis, Sai Chaitanya Susarla, Abhimanyu Susobhanan, Keitaro Takahashi
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Sub-second periodicity in a fast radio burst.

Nature 607:7918 (2022) 256-259

Authors:

CHIME/FRB Collaboration, Bridget C Andersen, Kevin Bandura, Mohit Bhardwaj, PJ Boyle, Charanjot Brar, Daniela Breitman, Tomas Cassanelli, Shami Chatterjee, Pragya Chawla, Jean-François Cliche, Davor Cubranic, Alice P Curtin, Meiling Deng, Matt Dobbs, Fengqiu Adam Dong, Emmanuel Fonseca, BM Gaensler, Utkarsh Giri, Deborah C Good, Alex S Hill, Alexander Josephy, JF Kaczmarek, Zarif Kader, Joseph Kania, Victoria M Kaspi, Calvin Leung, DZ Li, Hsiu-Hsien Lin, Kiyoshi W Masui, Ryan Mckinven, Juan Mena-Parra, Marcus Merryfield, BW Meyers, D Michilli, Arun Naidu, Laura Newburgh, C Ng, Anna Ordog, Chitrang Patel, Aaron B Pearlman, Ue-Li Pen, Emily Petroff, Ziggy Pleunis, Masoud Rafiei-Ravandi, Mubdi Rahman, Scott Ransom, Andre Renard, Pranav Sanghavi, Paul Scholz, J Richard Shaw, Kaitlyn Shin, Seth R Siegel, Saurabh Singh, Kendrick Smith, Ingrid Stairs, Chia Min Tan, Shriharsh P Tendulkar, Keith Vanderlinde, DV Wiebe, Dallas Wulf, Andrew Zwaniga

Abstract:

Fast radio bursts (FRBs) are millisecond-duration flashes of radio waves that are visible at distances of billions of light years1. The nature of their progenitors and their emission mechanism remain open astrophysical questions2. Here we report the detection of the multicomponent FRB 20191221A and the identification of a periodic separation of 216.8(1) ms between its components, with a significance of 6.5σ. The long (roughly 3 s) duration and nine or more components forming the pulse profile make this source an outlier in the FRB population. Such short periodicity provides strong evidence for a neutron-star origin of the event. Moreover, our detection favours emission arising from the neutron-star magnetosphere3,4, as opposed to emission regions located further away from the star, as predicted by some models5.
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