15 citations · 31 across the 8 of their papers we have counts for
8 papers
Revisiting rotationally excited CH at radio wavelengths: A case study towards W51
Arshia M. Jacob, Meera Nandakumar, Nirupam Roy +7
Ever since they were first detected in the interstellar medium, the radio wavelength (3.3 GHz) hyperfine-structure splitting transitions in the rotational ground state of CH have b…
Observational evidence for local vertical constraining of \HI by molecular cloud complexes
Meera Nandakumar, Nirupam Roy, Chanda J. Jog +1
A massive molecular cloud complex represents local gravitational potential that can constrain the vertical distribution of surrounding stars and gas. This pinching effect results i…
Large-scale turbulence cascade in the spiral galaxy NGC~6946
Meera Nandakumar, Prasun Dutta
The generation mechanism of compressible fluid turbulence at kiloparsec scales in the Interstellar Medium (ISM) is a long-lasting puzzle. In this work, we explore the nature of lar…
Probing galaxy evolution through HI 21-cm emission and absorption: current status and prospects with the Square Kilometre Array
Rajeshwari Dutta, Sushma Kurapati, J. N. H. S. Aditya +8
One of the major science goals of the Square Kilometre Array (SKA) is to understand the role played by atomic hydrogen (HI) gas in the evolution of galaxies throughout cosmic time.…
Bending Waves in Velocity Space: a First Look at the THINGS sample
Meera Nandakumar, Chaitra Narayan, Prasun Dutta
Detection of bending waves is a highly challenging task even in nearby disc galaxies due to their sub-kpc bending amplitudes. However, simulations show that the harmonic bending of…
Evidence of large scale energy cascade in the spiral galaxy NGC 5236
Meera Nandakumar, Prasun Dutta
Turbulence plays an important role in the structure and dynamics of the galaxy and influences various processes therein including star formation. In this work, we investigate the l…
Power spectrum to probe turbulence in Interstellar medium using 21cm line
Meera Nandakumar
Turbulent dynamics generate random fluctuations in density and velocity in the Interstellar Medium (ISM) of spiral and dwarf galaxies. Observationally, H~{\sc i} 21-cm radiation pr…
Estimating statistics of sky brightness using radio interferometric observations
Prasun Dutta, Meera Nandakumar
Radio interferometric data are used to estimate the sky brightness distributions in radio frequencies. Here we focus on estimators of the large-scale structure and the power spectr…