10 citations · 36 across the 17 of their papers we have counts for
18 papers
Large Magellanic Cloud Globular Clusters in the Near-infrared. I. RR Lyrae in Reticulum
Anupam Bhardwaj, Susmita Das, Prashant Nishad +10
Reticulum is an old, metal-poor, and sparsely populated globular cluster in the outer regions of the Large Magellanic Cloud (LMC) and hosts a rich population of RR Lyrae stars. Bei…
Photometric metallicity of Galactic RR Lyrae stars in the Gaia DR3 era
Mahiguhappriya Prakash, Susmita Das, Harinder P. Singh +1
We present a new, calibrated -band relationship between pulsation period , Fourier parameter , and metallicity [Fe/H] for galactic RR Lyrae stars from the Gaia survey…
Stellar Variability and Distance Indicators in the Near-infrared in Nearby Galaxies. II. Pulsating Stars in the Carina Dwarf Spheroidal
Chow-Choong Ngeow, Anupam Bhardwaj, Prashant Nishad +1
We present homogeneous, near-infrared ( bands) time-series observations of the classical Carina dwarf Spheroidal (dSph) galaxy to determine accurate and precise distances us…
Type II Cepheids: Period-Luminosity-Metallicity relations for the Population II distance scale
Susmita Das, Anupam Bhardwaj, Marcella Marconi
Type II Cepheids are a class of pulsating variable stars that play a critical role in our understanding of stellar evolution, distance measurement and tracing the structure and kin…
Multiwavelength study of observed and predicted pulsation properties of First overtone Cepheids in the Magellanic Clouds
Kerdaris Kurbah, Shashi M. Kanbur, Sukanta Deb +4
We present a detailed analysis of the light curves and pulsation properties of First Overtone (FO) Cepheids in the Magellanic Clouds (MCs) obtained using observations and predictio…
Variable stars in Galactic globular clusters II. Population II Cepheids
Mauricio Cruz Reyes, Richard I. Anderson, Susmita Das
We identified a sample of 88 bona fide Population II Cepheids (henceforth referred to as Cepheids) and 44 candidates in Galactic globular clusters (GCs). Seventy-eight of the Cephe…
A theoretical framework for BL Her stars IV. New period-luminosity relations in the Rubin-LSST filters
Susmita Das, László Molnár, Róbert Szabó +5
We present new theoretical light curves in the Rubin-LSST filters for a fine grid of BL Her models computed using MESA-RSP. We also derive new theoretical period-luminosity (PL) an…
A theoretical framework for BL Her stars III. A case study: Robust light curve optimisation in the LMC
Susmita Das, László Molnár, Gábor B. Kovács +8
We carry out an extensive light curve comparison of BL Her stars using observations from Gaia DR3 and stellar pulsation models computed using MESA-RSP with the goal to obtain the b…
New theoretical instability regions, period-luminosity relations and masses for blue large-amplitude pulsators
Susmita Das, Daniel Jadlovský, László Molnár
Blue large-amplitude pulsators (BLAPs) are a recently discovered group of hot pulsating stars whose evolutionary status remains uncertain. Their supposed progenitors are either $\s…
Bridging theory and observations in stellar pulsations: The impact of convection and metallicity on the instability strips of Classical and Type-II Cepheids
Mami Deka, Earl P. Bellinger, Shashi M. Kanbur +5
The effect of metallicity on the theoretical and empirical period-luminosity (PL) relations of Cepheid variables is not well understood and remains a highly debated issue. Here, we…
A theoretical framework for BL Her stars -- II. New period-luminosity relations in the Gaia passbands
Susmita Das, László Molnár, Shashi M. Kanbur +6
We present new theoretical period-luminosity (PL) and period-Wesenheit (PW) relations for a fine grid of convective BL Her, the shortest period T2Cs, models computed using MESA-RSP…
A multiphase study of classical Cepheids in the Magellanic Clouds- Models and Observations
Kerdaris Kurbah, Shashi M. Kanbur, Sukanta Deb +5
This work presents the study of multiphase relations of classical Cepheids in the Magellanic Clouds for short periods (log P < 1) and long periods (log P > 1). From the analysis, i…
A study of the stellar photosphere-hydrogen ionization front interaction in Scuti stars
Mami Deka, Shashi M. Kanbur, Sukanta Deb +1
Pulsating variable Scuti stars are intermediate-mass stars with masses in the range of and spectral types between and . They can be found at the inte…
Correlated Short-Timescale Hard-Soft X-ray Variability of the Blazars Mrk 421 and 1ES 1959+650 using
Susmita Das, Ritaban Chatterjee
We study simultaneous soft ( keV) and hard ( keV) X-ray light curves at a total of eight epochs during of two TeV blazars Mrk 421 and 1ES 1959+650 ob…
Predicting light curves of RR Lyrae variables using artificial neural network based interpolation of a grid of pulsation models
Nitesh Kumar, Anupam Bhardwaj, Harinder P. Singh +4
We present a new technique to generate the light curves of RRab stars in different photometric bands ( and bands) using Artificial Neural Networks (ANN). A pre-computed grid…
A multiphase study of theoretical and observed light curves of classical Cepheids in the Magellanic Clouds
Kerdaris Kurbah, Sukanta Deb, Shashi M. Kanbur +5
We present an analysis of the theoretical and observed light curve parameters of the fundamental mode (FU) classical Cepheids in the Magellanic Clouds in - and - photometric…
Period-Colour and Amplitude-Colour relations for OGLE- Scuti stars in the Galactic Bulge and LMC
Mami Deka, Shashi M. Kanbur, Sukanta Deb +4
We present an analysis on the behaviour of the Galactic bulge and the Large Magellanic Cloud (LMC) Scuti stars in terms of period-colour and amplitude-colour (PCAC) relations a…
Time-series analyses of Cepheid and RR Lyrae variables in the wide-field variability surveys
A. Bhardwaj, S. M. Kanbur, M. Marconi +5
We discuss time-series analyses of classical Cepheid and RR Lyrae variables in the Galaxy and the Magellanic Clouds at multiple wavelengths. We adopt the Fourier decomposition meth…