Piyush Marmat

Education

Personal Projects

Professional and Scientific Experience

Visiting Scientist, International Space Science Institute, Bern, Switzerland

Mar-Apr 2023
  • Contributed to a white paper on lunar gravitational-wave detection, including analysis of tidal disruption of white dwarfs.
  • Improved Python simulations for phase-resolved spectra and frequency-resolved light curves of magnetic cataclysmic variables in the X-ray regime, including interstellar photoelectric absorption.
  • Analyzed the Gertsenshtein-Zel'dovich effect in the context of pulsar magnetospheres.
  • Assisted the late Prof. Maurizio Falanga in graduate-level teaching activities and grant proposal preparation.

ThinkSwiss Research Scholar, University of Bern, Switzerland

Sep-Nov 2022
  • Implemented radial velocity models for spectroscopic binaries; simulated dynamics and velocity profiles.
  • Derived fractional changes to pulsar spin induced by gravitational waves leading to quadrupolar oscillations.
  • Compared the effect of magnetospheric radii on accretion luminosities in neutron stars and rotating black holes.

Head Secretary, Physics and Astronomy Club-IIT Roorkee, India

Jul 2019 - Apr 2021

Publications

  1. Planets in Pulsar Winds. T Kaister, S Mendez, P Marmat, M Cemeljic, M Velli, J Varela, M Falanga. arXiv preprint arXiv:2605.14077, 2026. https://doi.org/10.48550/arXiv.2605.14077.
  2. Jaikhomba Singha, Bhal Chandra Joshi, ..., Piyush Marmat et al. Improving DM estimates using low-frequency scatter-broadening estimates, Monthly Notices of the Royal Astronomical Society, Volume 535, Issue 1, November 2024, Pages 1184-1192. https://doi.org/10.1093/mnras/stae2405.
  3. Branchesi, M., Falanga, M., Harms, J., ..., Piyush Marmat et al. Lunar Gravitational-Wave Detection. Space Sci Rev 219, 67 (2023). https://doi.org/10.1007/s11214-023-01015-4.
  4. Joshi, B.C., Gopakumar, A., Pandian A., ..., Piyush Marmat et al. Nanohertz gravitational wave astronomy during SKA era: An InPTA perspective. J Astrophys Astron 43, 98 (2022). https://doi.org/10.1007/s12036-022-09869-w.
  5. Tarafdar, P., Nobleson, K., Rana, P., Singha, J., Krishnakumar, M., Joshi, B., ..., Piyush Marmat, ..., Pathak, D. The Indian Pulsar Timing Array: First data release. Publications of the Astronomical Society of Australia, 39, E053 (2022). https://doi.org/10.1017/pasa.2022.46.
  6. K Nobleson, Nikita Agarwal, ..., Piyush Marmat et al. Low-frequency wideband timing of InPTA pulsars observed with the uGMRT, Monthly Notices of the Royal Astronomical Society, Volume 512, Issue 1, May 2022, Pages 1234-1243. https://doi.org/10.1093/mnras/stac532.
  7. Jaikhomba Singha, Mayuresh P Surnis, ..., Piyush Marmat et al. Evidence for profile changes in PSR J1713+0747 using the uGMRT, Monthly Notices of the Royal Astronomical Society: Letters, Volume 507, Issue 1, October 2021, Pages L57-L61. https://doi.org/10.1093/mnrasl/slab098.

Conference Contributions

  1. How magnetospheric propagation affects the polarised radio emission from pulsars, Conference Presentation, 27th RAGTIME, Silesian University in Opava, Czech Republic, Nov 2025.
  2. Testing Polarization Models on the Radio Pulsar PSR J1900-2600: Birefringent Filtering, Angular Mode Separation, and Mode Coupling, Conference Presentation, 42nd Congress of the Polish Astronomical Society, University of Warsaw, Poland, Sep 2025.
  3. The Glitch Rise Times of Rotating Neutron Stars. J Singha, H Grover, P Marmat, P Arumugam, Proceedings of the DAE Symp. on Nucl. Phys 66, 798. (2022)
  4. Neutron Star Equation of state in single and two fluid formalism. B Bhat, P Marmat, H Grover, J Singha, A Kumar, P Arumugam, Proceedings of the DAE-BRNS symposium on nuclear physics. V. 66, 2-2. (2022)
  5. A python based pipeline to analyse Interstellar scintillation of radio pulsars observed with ORT and uGMRT. P Marmat, J Singha, BC Joshi, Poster - 40th Meeting of ASI 2022.
  6. Building a 5m aperture small radio-telescope at IIT Roorkee. Vanshaj Kerni, Piyush Marmat et al. Conference Poster, 40th Meeting of ASI 2022.
  7. Using low frequency scatter-broadening measurements for precision estimates of DM. Jaikhomba Singha, Bhal Chandra Joshi, P. Arumugam, Piyush Marmat, et al. Conference Poster, 40th Meeting of ASI 2022.

Training / Workshops / Schools

Scientific Outreach