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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

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Sub department

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

The CHIME Fast Radio Burst Project: System Overview

The Astrophysical Journal American Astronomical Society 863:1 (2018) 48

Authors:

M Amiri, K Bandura, P Berger, M Bhardwaj, MM Boyce, PJ Boyle, C Brar, M Burhanpurkar, P Chawla, J Chowdhury, J-F Cliche, MD Cranmer, D Cubranic, M Deng, N Denman, M Dobbs, M Fandino, E Fonseca, BM Gaensler, U Giri, AJ Gilbert, DC Good, S Guliani, M Halpern, G Hinshaw, C Höfer, A Josephy, VM Kaspi, TL Landecker, D Lang, H Liao, KW Masui, J Mena-Parra, A Naidu, LB Newburgh, C Ng, C Patel, U-L Pen, T Pinsonneault-Marotte, Z Pleunis, M Rafiei Ravandi, SM Ransom, A Renard, P Scholz, K Sigurdson, SR Siegel, KM Smith, IH Stairs, SP Tendulkar, K Vanderlinde, DV Wiebe

Precision pulsar timing with the ORT and the GMRT and its applications in pulsar astrophysics

Journal of Astrophysics and Astronomy Springer Nature 39:4 (2018) 51

Authors:

Bhal Chandra Joshi, Prakash Arumugasamy, Manjari Bagchi, Debades Bandyopadhyay, Avishek Basu, Neelam Dhanda Batra, Suryarao Bethapudi, Arpita Choudhary, Kishalay De, L Dey, A Gopakumar, Y Gupta, MA Krishnakumar, Yogesh Maan, PK Manoharan, Arun Naidu, Rana Nandi, Dhruv Pathak, Mayuresh Surnis, Abhimanyu Susobhanan

Detection of long nulls in PSR B1706−16, a pulsar with large timing irregularities

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 475:2 (2018) 2375-2382

Authors:

Arun Naidu, Bhal Chandra Joshi, PK Manoharan, MA Krishnakumar

Wide band simultaneous multi-frequency single pulse study of PSR J1822−2256 with upgraded GMRT

Proceedings of the International Astronomical Union 13:S337 (2018) 348-349

Authors:

BC Joshi, A Naidu, V Gajjar, GAE Wright

Abstract:

We present simultaneous multi-frequency observations of PSR J1822−2256 for the first time, utilizing the unique capabilities of upgraded Giant Meterwave Radio Telescope (uGMRT). No emission is detected in about 10 % of pulses. At least two drift modes and a possibly third rare mode, occur for 66, 21 and 2 % pulses respectively (P3 ∼ 17, 7.5 and 5 P0 respectively). The three drift modes and the nulls occur concurrently from 250 to 1500 MHz. Modal average profiles are distinct with their widths increasing with drift rate. These sub-pulse drift related profile mode-changes can provide independent probes of beam geometry and polar gap physics.

Detection of radio emission from the gamma-ray pulsar J1732−3131 at 327 MHz

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 471:1 (2017) 541-547

Authors:

Yogesh Maan, MA Krishnakumar, Arun K Naidu, Subhashis Roy, Bhal Chandra Joshi, Matthew Kerr, PK Manoharan

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