188 citations · 227 across the 10 of their papers we have counts for
10 papers
Evolution of electron beam pulses of short duration in the solar corona
G. A. Casillas-Pérez, S. Jeyakumar, H. R. Pérez-Enríquez +1
Narrowband radio bursts with durations of the order of milliseconds, called spikes, are known to be associated with solar flares. In order to understand the particle beams responsi…
Magnetic Field Strengths in Photodissociation Regions
Dana S. Balser, D. Anish Roshi, S. Jeyakumar +3
We measure carbon radio recombination line (RRL) emission at 5.3 GHz toward four HII regions with the Green Bank Telescope (GBT) to determine the magnetic field strength in the pho…
Long-term optical flux and colour variability in quasars
N. Sukanya, C. S. Stalin, S. Jeyakumar +3
We have used optical V and R band observations from the Massive Compact Halo Object (MACHO) project on a sample of 59 quasars behind the Magellanic clouds to study their long term…
VLA and GBT Observations of Orion B (NGC 2024, W12) : Photo-dissociation Region Properties and Magnetic field
D. Anish Roshi, W. M. Goss, S. Jeyakumar
We present images of C110 and H110 radio recombination line (RRL) emission at 4.8 GHz and images of H166, C166 and X166 RRL emission at 1.4 GHz, observed toward the…
Modelling Carbon Radio Recombination Line observation towards the Ultra-Compact HII region W48A
S. Jeyakumar, D. Anish Roshi
We model Carbon Recombination Line (CRL) emission from the Photo Dissociation Region (PDR) surrounding the Ultra-Compact (UC) HII region W48A. Our modelling shows that the inner re…
Mass of the black hole in the Seyfert 1.5 galaxy H 0507+164 from reverberation mapping
C. S. Stalin, S. Jeyakumar, R. Coziol +2
We present the results of our optical monitoring campaign of the X-ray source H 0507+164, a low luminosity Seyfert 1.5 galaxy at a redshift z = 0.018. Spectroscopic observations we…