8 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 surve…
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…
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…
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…