Radio Galaxies: Giant radio galaxies, spectral and dynamical evolution
Active Galactic Nuclei: Duty cycle, multi-wavelength analysis, accretion and jet physics
Astrophysical jets: kpc scale radio jets, pc scale jets with VLBI
Black Hole: The fundamental plane of black hole activity, black hole and galaxy co-evolution.
Radio Survey: Science with a large area sky survey at low and high frequencies. Deep Fields.
Polarization.
I use several radio telescopes worldwide (e.g., LOFAR, uGMRT, VLA, and ASKAP). My research involves preparing radio proposals, intensive radio data analysis, handling big data, and applying complex coding pipelines.
I have successfully obtained 9 radio and 2 optical proposals as PI (~100 hrs).
Telescope (No of the proposal): Allotted time
LOFAR (2 proposals): 21.2 hrs
uGMRT (5 proposals): 63 hrs
JVLA (3 proposals): 19 hrs
SALT (2 proposal): 4.4 hrs
PUBLISHED IN REFEREED JOURNALS (AS FIRST AUTHOR)
Serendipitous discovery of a spiral host in a 2 Mpc double-double lobed radio galaxy
Sagar Sethi, Agnieszka Kuźmicz, Dominika Hunik and Marek Jamrozy Astronomy & Astrophysics Letters, axiv, DOI (2025)
Study of giant radio galaxies using spectroscopic observations from the Himalayan Chandra Telescope
Sagar Sethi, Pratik Dabhade, K. G. Biju, C. S. Stalin and Marek Jamrozy, Astronomy & Astrophysics, Volume 695, A137, DOI (2025)
Discovery of a 100 kpc Narrow Curved Twin Jet in the S-shaped Giant Radio Galaxy J0644+1043
Sagar Sethi, Agnieszka Kuźmicz, Marek Jamrozy, and Lyuba Slavcheva-Mihova, The Astrophysical Journal, Volume 969, Number 2, ads, DOI (2024)
PUBLISHED IN REFEREED JOURNALS (AS CO-AUTHOR)
RAD@home discovery of a bow-and-arrow radio galaxy tracing a ∼560 kpc bow-shock structure in a multihalo environment
A. Hota et al., +Sagar Sethi, Monthly Notices of the Royal Astronomical Society Letters Volume 549, Issue 4, July, 2026, ads, DOI (2026)
The LOFAR Two-metre Sky Survey VII. Third Data Release
Shimwell, T. W., et al., +Sagar Sethi, Astronomy & Astrophysics, Volume 707, A198, ads, DOI (2026)
Giant Radio Quasars: Composite Optical Spectra
Agnieszka Kuźmicz, Sagar Sethi, and Marek Jamrozy, The Astrophysical Journal, Volume 922, Number 1, ads, DOI (2021)
Tracking Galaxy Evolution Through Low-Frequency Radio Continuum Observations using SKA and Citizen-Science Research using Multi-Wavelength Data
Hota, A. et al., +Sagar Sethi, Journal of Astrophysics and Astronomy, Volume 37, article number 41, ads, DOI (2016)
PROCEEDINGS
Spectral ageing analysis of a Giant Radio Quasar: PKS 1127-130
Sagar Sethi, Agnieszka Kuźmicz and Marek Jamrozy, Proceedings of the Polish Astronomical Society, Vol. 12, pp.89-92 ads (2022)
Ten years of searching for relics of AGN jet feedback through RAD@home citizen science
Hota, A. et al., +Sagar Sethi, ISRA 2023 ads (2024)