CV (A4) |
publications via
ADS
(
refereed).
I am interested in many areas of Radio Astronomy, but generally inclined to doing projects that require new and improved instrumentation.
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Scintillometry is the precise measurement of scintillation, and its use as a tool to probe the interstellar medium. I use pulsars and Fast Radio Bursts (FRB) as sources to study the ISM, both in the Milky Way as well as FRB host galaxies. I'm mainly interested in the dynamics of lensing structures and optical phenomenology. I work on interpreting and modelling the observed scintillation, which includes radio data analysis and simulations.
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To a much smaller extent these days, I work on 21 cm Cosmology, focusing on techniques and novel obesrvational strategies to characterize the foregrounds on the largest angular scales.
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I also work on instrumentation for VLBI, as well as validating new modes of the GMRT Wideband Backend (GWB) for enabling niche science. For example, the scintillometry benefits enormously from using Nyquist-sampled baseband data, in applications like VLBI, probing large delays and scattering broadening times and cyclic spectroscopy.
- Marthi & Maan, A Direct Measurement of the Electron Density Turbulence Parameter \(C_1\) and Implications for the Emission Size of Magnetar XTE J1810-197, 2025 ApJ 989L:34
- Marthi et al., Burst properties of the highly active FRB20201124A using uGMRT, 2022 MNRAS 509:2209
- Marthi et al., Scintillation of PSR B1508+55 - the view from a 10 000-km baseline, 2021 MNRAS 506:5160
- Marthi et al., Detection of 15 bursts from the fast radio burst 180916.J0158+65 with the upgraded Giant Metrewave Radio Telescope, 2020 MNRAS 499:L16
- Marthi et al., Simulated predictions for H I at \(z = 3.35\) with the Ooty Wide Field Array - I. Instrument and the foregrounds, 2017 MNRAS 471:3112
- Marthi & Chengalur, Non-linear redundnacy calibration, 2014 MNRAS 437:524
- Bethapudi et al. incl. & Marthi, Rotation Measure study of FRB 20180916B with the uGMRT, 2025 A&A 694A:75B
- Main et al. incl. Marthi, Modelling annual scintillation velocity variations of FRB 20201124A, 2023 MNRAS 522L:36M
- Main et al. incl. Marthi, Scintillation time-scale measurement of the highly active FRB20201124A, 2022 MNRAS 509:3172
- Simard et al. incl. Marthi, Disentangling interstellar plasma screens with pulsar VLBI: combining auto- and cross-correlations, 2019 MNRAS 488:4963
- Simard et al. incl. Marthi, A comparison of interferometric and single-dish methods to measure distances to pulsar scattering screens, 2019 MNRAS 488:4952
I'm happy to discuss possible research projects (both graduate school as well as Ph.D. thesis) with students. Currently I'm not accepting external students for summer projects / short projects. However, I'm happy to take students in residence for M.Sc thesis projects.
My collaborators are easily identified via
ADS.
2025-26 Radio Telescopes (mainly single dish)
2024-25 Methods of Mathematical Physics I
2023-24 Methods of Mathematical Physics I
