This study examines the preservation challenges and strategies implemented at the Library of the Kodaikanal Solar Observatory (KSO), part of the Indian Institute of Astrophysics. The library houses rare and sometimes fragile ...

Context. The standard nonlocal thermodynamic equilibrium (non-LTE) multi-level radiative transfer problem only takes into account the deviation of the radiation field and atomic populations from their equilibrium ...

A high-precision polarimeter for simultaneous multi-line spectropolarimetric Sun observations is under development at Indian Institute of Astrophysics. Towards this end, we plan to use liquid-crystal retarders as the ...

Time Domain Astronomy (TDA) has ushered in a new era of cosmic exploration. This has been possible with the advanced sensitive surveys that have allowed the discovery and classification of transients to reach unprecedented ...

The study of exoplanets is one of the fastest-growing areas in astronomy. The number of known exoplanets has increased dramatically, providing new insights into the galaxy’s diversity and abundance of planetary systems. ...

Aerosol optical and radiative properties over the Leh Ladakh, located in the climate sensitive Hindu Kush Himalayan region are examined using one year measurements from a newly installed sky radiometer from July 2023 ...

The transient Galactic black hole candidate Swift J151857.0-572147 went through an outburst in 2024 March for the first time. Using publicly archived Insight-HXMT data, we have analyzed the timing and spectral properties ...

Context. Be stars are rapidly rotating stars surrounded by a disc; however, the origin of these stars remains unclear. Mass and angular momentum transfer in close binaries account for the rapid rotation of a major fraction ...

Dust is expected to form on a year timescale in core-collapse supernova (SN) ejecta. Its existence is revealed through an infrared brightening, an optical dimming, or a blue-red emission-line profile asymmetry. To investigate ...

We explore the diagnostic potential of the Hα line for probing the chromospheric magnetic field using a realistic 3D radiative magnetohydrodynamic (rMHD) model. The Stokes profiles of the Hα line are synthesized through full ...