21 citations · 70 across the 13 of their papers we have counts for
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Unveiling the Variability and Chemical Composition of AL Col
Surath C. Ghosh, Santosh Joshi, Samrat Ghosh +9
Using \tess\ short-cadence (120\,s) SAP flux, we identified a rotational frequency of 0.09655\, (\,d). Wavelet analysis reveals that while…
Dynamic Photometric Variability in Three Young Brown Dwarfs in Taurus: Detection of Optical Flares with TESS data
Samrat Ghosh, Soumen Mondal, Somnath Dutta +4
We present -band time-series photometric variability studies of three known nearby ( 140 pc) and young ( 1 Myr) brown dwarfs (BD) in the Taurus star-forming region…
Starspot distribution and flare events in two young low-mass stars using TESS data
Rajib Kumbhakar, Soumen Mondal, Samrat Ghosh +1
Wide-field high-precision photometric observations such as \textit{Transiting Exoplanet Survey Satellite (TESS)} allowed the investigation of the stellar magnetic activity of cool…
Photometric Variability of Low Mass Stars and Brown Dwarfs in IC~348 and Taurus Star-Forming Regions
Samrat Ghosh, Soumen Mondal, Santosh Joshi +2
Low-mass stars belonging to the M spectral type are the most numerous stars in our Galaxy, amounting to about two-thirds in number, and are found at the bottom of the main sequence…
Rotational Variability and Detection of Superflares in a Young Brown Dwarf by TESS
Rajib Kumbhakar, Soumen Mondal, Samrat Ghosh +2
We present a comprehensive analysis of a Transiting Exoplanet Survey Satellite (TESS) high-quality light curve for a young brown dwarf, MHO~4 having spectral type M7.0, in the Taur…
Fast Photometric Variability of Very Low Mass Stars in IC 348: Detection of Superflare in an M-dwarf
Samrat Ghosh, Soumen Mondal, Somnath Dutta +5
We present here optical I-band photometric variability study down to 19 mag of a young (2-3 Myr) star-forming region IC 348 in the Perseus molecular cloud. We aim to…
Morphology and ionization characteristics of planetary nebulae PB 1 and PC 19
Rahul Bandyopadhyay, Ramkrishna Das, Soumen Mondal +1
We present results of our study of two planetary nebulae (PNe), PB1 and PC 19. We use the optical spectra of these two PNe observed at 2 m Himalayan Chandra Telescope and also arch…
Understanding Physical Properties of Young M-dwarfs: NIR spectroscopic studies
Dhrimadri Khata, Soumen Mondal, Ramkrishna Das +2
We present here medium resolution (λ/Δλ\sim1200) H- and K-band spectra of M type dwarf stars covering the wavelength range 1.50 - 1.80 μm and 1.95 - 2.45 μm. The sample includes 53…
The young cluster NGC 2282 : a multi-wavelength perspective
Somnath Dutta, S. Mondal, J. Jose +3
We present the analysis of the stellar content of NGC~2282, a young cluster in the Monoceros constellation, using deep optical and IPHAS photometry along with infrared (IR) d…