Explanipedia

Magnetic Activities of Wolf 359: Starspot Distribution and Quasiperiodic Pulsation Using TESS Data Open

Diya Ram, Soumen Mondal, Samrat Ghosh, Rajib Kumbhakar · 2025

Wolf 359 is the fifth closest (∼2.4 pc) star to Earth and a candidate exoplanet-hosting M6 dwarf. We studied the distribution of starspots and flaring activities of Wolf 359 to understand its stellar atmosphere and magnetic activities. Usi…

A Morphological Identification and Study of Radio Galaxies from LoTSS DR2. I. The “Winged” Radio Galaxies Open

Soumen Bera, Taotao Fang, Tapan K. Sasmal, M. Kunert‐Bajraszewska, Xuelei Chen , et al. · 2025

We conducted an extensive identification and analysis of various morphological classes and subclasses of radio galaxies using the latest high-resolution data from the second data release of the LOFAR Two-metre Sky Survey. This paper presen…

Stellar Variability toward the Galactic Open Cluster NGC 7209 Open

Dorothy Museo Mwanzia, Sneh Lata, Wen-Ping Chen, Soumen Mondal, Geoffrey O. Okeng'o , et al. · 2025

We present the analysis of stellar variability in an open cluster NGC 7209 using optical V -band CCD photometric observations. Out of 4499 stars in our study, we detected 284 candidate variables, including one identified previously. Using …

Starspot Distribution and Flare Events in Two Young Low-mass Stars Using TESS Data Open

Rajib Kumbhakar, Soumen Mondal, Samrat Ghosh, Diya Ram · 2025

Wide-field high-precision photometric observations such as the Transiting Exoplanet Survey Satellite (TESS) allowed the investigation of the stellar magnetic activity of cool stars. M dwarf starspots and stellar flares are the main indicat…

Dynamic Photometric Variability in Three Young Brown Dwarfs in Taurus: Detection of Optical Flares with TESS Data Open

Samrat Ghosh, Soumen Mondal, Somnath Dutta, Rajib Kumbhakar, Ramkrishna Das , et al. · 2025

We present I -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 in the Perseus molecular cloud. From 10 nights of observations over a tim…

Magnetic Activities of AD Leonis: Flares in TESS Data and Optical Spectra Open

Diya Ram, Soumen Mondal, Dusmanta Patra, Samrat Ghosh, Rajib Kumbhakar · 2025

We studied the flaring activities of M4.5 dwarf AD Leo to understand its stellar atmospheres and magnetic activities. We present new observational results on this highly active star, using nonsimultaneous measurement of Transiting Exoplane…

Starspot distribution and flare events in two young low-mass stars using TESS data Open

Rajib Kumbhakar, Soumen Mondal, Samrat Ghosh, Diya Ram · 2025

Wide-field high-precision photometric observations such as \textit{Transiting Exoplanet Survey Satellite (TESS)} allowed the investigation of the stellar magnetic activity of cool stars. M-dwarf's starspots and stellar flares are the main …

A Study of Detached Eclipsing Binary Systems towards the Open Cluster NGC 7209 Open

Sneh Lata, Dorothy Museo Mwanzia, Geoffrey Okeng apos o, Soumen Mondal, John Buers · 2025

Recent ATLAS Results Relevant for PDFs at Low and High $x$, Saturation in Both $pp$ and Heavy-ion Collisions Open

Soumen Mondal · 2025

Clinical Evaluation of Faricimab in Real-World Diabetic Macular Edema in India- A Multicenter Observational Study Open

Debdulal Chakraborty, Sudipta Das, Aniruddha Maiti, Tushar Sinha, Arnab Das , et al. · 2025

Faricimab treatment resulted in significant improvements in visual acuity and anatomical outcomes in both treatment-naïve and recalcitrant DME eyes, highlighting its potential as a valuable therapeutic option in diverse clinical settings. …

Research on the interstellar medium and star formation in the Galaxy: An Indian perspective Open

B. Mookerjea, G. Maheswar, Kinsuk Acharyya, Tapas Baug, P. Datta , et al. · 2024

A spectroscopy-based proof-of-concept (POC) for developing loading of pathogen analyzer (LOPA) for dairy products Open

Lopamudra Roy, Amrita Banerjee, Nivedita Pan, Ria Ghosh, Susmita Mondal , et al. · 2024

Detection of bacterial contamination in dairy products of daily use is a challenge worldwide. We have utilized Methylene Blue Reduction Test (MBRT) for quantification of the microbial count in dairy products (milk) and developed a proof-of…

Strange and Odd Morphology Extragalactic Radio Sources (STROMERSs): A Faint Images of the Radio Sky at Twenty-Centimeters (FIRST) Look at the Strange and Odd Radio Sources Open

Soumen Bera, Tapan K. Sasmal, Soumen Mondal, Taotao Fang, Xuelei Chen · 2024

We report the identification of an extremely rare and peculiar set of irregular radio sources, termed “STROMERSs” (STRange and Odd Morphology Extragalactic Radio Sources).ingThe irregular radio sources with very anomalous morphologies that…

Brolucizumab versus aflibercept for recalcitrant diabetic macular edema in Indian real-world scenario – The BRADIR study Open

Debdulal Chakraborty, Ashish Sharma, Soumen Mondal, Jay Sheth, Tushar Sinha , et al. · 2024

The BRADIR study suggests that brolucizumab might have an edge over aflibercept in visual and anatomical outcomes that lasted 52 weeks with reduced injection frequency in case of recalcitrant DME.

Influence of mid-infrared Galactic bubble on surroundings: A case study on IRAS 16489-4431 Open

Ariful Hoque, Tapas Baug, L. K. Dewangan, Ke Wang, Tie Liu , et al. · 2024

We studied the influence of a massive star on a mid-infrared bubble and its surrounding gas in the IRAS\,16489-4431 star-forming region using multi-wavelength data. The {\it Spitzer} mid-infrared band images revealed the shocked nature of …

Eccentric orbits in disc-embedded EMRIs : orbital evolution and observability trend in LISA Open

Prasad Basu, Sangita Chatterjee, Soumen Mondal · 2024

The purpose of this work is to study the orbital evolution under the combined effect of disc-drag and GW-emission for E/IMRIs endowed with accretion disc. We study the dependence of disc-torque and GW-torque on the orbital-parameters of co…

Star Formation in the H ii Region Sh2-87: Evidence of Global Hierarchical Collapse Open

Siddhartha Biswas, Soumen Mondal, Ariful Hoque, Alik Panja, Tapas Baug , et al. · 2024

We present a detailed study of the Sh2-87 H ii region using a multiwavelength data set in optical to radio bands. A Herschel column density map revealed that the host cloud is filamentary in nature, and together they formed a central dense…

Photometric Variability of Low Mass Stars and Brown Dwarfs in IC~348 and Taurus Star-Forming Regions Open

Samrat Ghosh, Soumen Mondal, Santosh Joshi, Sneh Lata, Rajib Kumbhakar · 2024

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 in the H-R diagram. %Multi-wavelength studies on star-form…

Proceedings of the 3rd BINA Workshop: Scientific Potential of Indo-Belgian Co-operation Open

Santosh Joshi, P. De Cat, M. De Becker, K. Kolenberg, Soumen Mondal , et al. · 2024

In this report, we present an overview of the 3rd BINA workshop hosted by ARIES, Nainital on a broad theme the Scientific potential of the Indo-Belgian co-operation. Further, an introduction of the proceedings of the 3rd BINA workshop is a…

Observational Evidence of the Merging of Filaments and Hub Formation in G083.097+03.270 Open

Alik Panja, L. K. Dewangan, Tapas Baug, Wen-Ping Chen, Yan Sun , et al. · 2023

We uncover a hub–filament system correlated with massive young stellar associations in G083.097+03.270. Diagnosed with simultaneous 12 CO, 13 CO, and C 18 O line observations, the region is found to host two distinct and elongated filament…

Novel surgical technique for macular holes with basal diameter >1000 μ Open

Debdulal Chakraborty, Soumen Mondal, Sabyasachi Sengupta, Subhendu Boral, Arnab Das · 2023

Closure rate of full-thickness macular holes (FTMHs) with basal diameter >1000 μ is known to be poor. Patients presenting with FTMH having a minimum basal diameter of >1000 μ without any coexistent retinal morbidity were offered vitrectomy…

Detectability of gas-rich E/IMRI’s in <i>LISA</i> band: observable signature of transonic accretion flow Open

Sangita Chatterjee, Soumen Mondal, Prasad Basu · 2023

Real extreme/intermediate-mass ratio inspiral (E/IMRI) systems are likely to contain large accretion discs which could be as massive as the central supermassive black hole. Therefore, contrary to its ideal model, a real E/IMRI system conta…

Merging Filaments and Hub Formation in the G083.097$+$03.270 Molecular Complex Open

Alik Panja, L. K. Dewangan, Tapas Baug, Wen-Ping Chen, Yan Sun , et al. · 2023

We uncover a hub-filament system associated with massive star formation in the G083.097$+$03.270. Diagnosed with simultaneous $^{12}$CO, $^{13}$CO, and C$^{18}$O line observations, the region is found to host two distinct and elongated fil…

Rotational Variability and Detection of Superflares in a Young Brown Dwarf by TESS Open

Rajib Kumbhakar, Soumen Mondal, Samrat Ghosh, Diya Ram, Sudip Pramanik · 2023

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 Taurus star-forming region. We investigate the rotation periods…

TESS Photometric Variability of Young Brown Dwarfs in the Taurus Star-forming Region Open

Rajib Kumbhakar, Soumen Mondal, Samrat Ghosh, Diya Ram · 2023

We present a comprehensive analysis of TESS high-quality light curves from sectors 43 and 44 of a few samples of young (∼2–3 Myr) brown dwarfs in the Taurus molecular cloud. They are well characterized and bona fide members of Taurus. We a…

Ideal E/IMRI vs Real E/IMRI system : Observable signature in LISA Open

Sangita Chatterjee, Soumen Mondal, Prasad Basu · 2023

Real extreme/intermediate mass ratio inspiral(E/IMRI) systems are likely to contain large accretion disks which could be as massive as the central supermassive black hole. Therefore, contrary to its ideal model, a real E/IMRI system contai…

Study of Spectral State Transitions in Black Hole Binaries Open

Soumen Mondal · 2023

The aim of our work is to study the origin of the spectral transitions of transient black hole binaries. In this work, we find signatures of spectral state transition (hard to soft state) while studying the radiative shock for the accretio…

AN EFFICIENT E-CERTIFICATE MANAGEMENT SYSTEM IN E-LEARNING USING BLOCKCHAIN Open

Soumen Mondal, ANIRBAN PANJA, Sunil Karforma · 2023

Blockchain is a cutting-edge information technology that allows users to create ever-growing lists of data sequences.Individual higher education organizations or groupings of educational institutions can use blockchain in their automated m…

Photometric variable stars in the young open cluster NGC 6823 Open

Sneh Lata, Wen-Ping Chen, J. C. Pandey, Athul Dileep, Zhong-Han Ai , et al. · 2023

We present stellar variability towards the young open cluster NGC\,6823. Time series $V$- and $I$-band CCD photometry led to identification and characterization of 88 variable stars, of which only 14 have been previously recognized. We asc…

Photometric variable stars in the young open cluster NGC 6823 Open

Sneh Lata, Wen-Ping Chen, J. C. Pandey, Athul Dileep, Zhong-Han Ai , et al. · 2023

We present stellar variability towards the young open cluster NGC 6823. Time series V- and I-band CCD photometry led to identification and characterization of 88 variable stars, of which only 14 have been previously recognized. We ascertai…

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