2021/01/13 by Sabyasachi Pal, Pal, Sabyasachi, Arijit Manna +1
Engineering · Physics and Astronomy · #Astro and Planetary Science #Earth and Planetary Astrophysics (astro-ph.EP) #FOS: Physical sciences #Planetary Science and Exploration #Spacecraft and Cryogenic Technologies
paper · pdf · doi:10.48550/arxiv.2101.05267
openalex publication_date 2021/01/13 · openalex created_date 2022/07/25 · openalex updated_date 2026/07/28
Comets are the most primordial objects in our solar system. Comets are icy bodies that release gas and dust when they move close to the Sun. The C/2020 F3 (NEOWISE) was a nearly isotropic comet that was moving in a near-parabolic orbit. The comet C/2020 F3 (NEOWISE) was the brightest comet in the northern hemisphere after comet Hale-Bopp in 1997 and comet McNaught in 2006. In this article, we reported the first interferometric high-resolution detection of the comet C/2020 F3 (NEOWISE) using the Giant Metrewave Radio Telescope (GMRT). We detected the radio continuum emission from comet C/2020 F3 (NEOWISE) with flux density level 2.84(±0.56)-3.89(±0.57) mJy in the frequency range 1050-1450 MHz. We also detected the absorption line of atomic HI with Signal to Noise Ratio (SNR) ∼5.7. The statistical column density of the detected HI absorption line was NHI = (3.46±0.60)×(Ts/100)×1021 cm-2 where we assumed spin temperature Ts = 100 K and filling factor f = 1. The significant detection of continuum emission from the comet C/2020 F3 (NEOWISE) in ∼21 cm wavelength indicated that it arose from the large Icy Grains Halo (IGH) region.