Nirupam Roy

An H I Column Density Threshold for Cold Gas Formation in the Galaxy

We report the discovery of a threshold in the HI column density of Galactic gas clouds below which the formation of the cold phase of HI is inhibited. This threshold is at

The Radio Light Curve of the Gamma-Ray Nova in V407 CYG: Thermal Emission from the Ionized Symbiotic Envelope, Devoured from within by the Nova Blast

N_{HI} = 2 \times 10^{20}

A multiwavelength investigation of the temperature of the cold neutral medium

per cm

EXPANDED VERY LARGE ARRAY NOVA PROJECT OBSERVATIONS OF THE CLASSICAL NOVA V1723 AQUILAE

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H i 21 cm opacity fluctuations power spectra towards Cassiopeia A

; sightlines with lower HI column densities have high spin temperatures (median

TINY SCALE OPACITY FLUCTUATIONS FROM VLBA, MERLIN, AND VLA OBSERVATIONS OF H I ABSORPTION TOWARD 3C 138

T_s \sim 1800

Turbulence measurements from H i absorption spectra

K), indicating low fractions of the cold neutral medium (CNM), while sightlines with

Magnetohydrodynamic turbulence in supernova remnants

N_{HI} \ge 2 \times 10^{20}

On spherically symmetrical accretion in fractal media

per cm

The angular power spectrum measurement of the Galactic synchrotron emission in two fields of the TGSS survey

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