| Name: Kapil Kumar |
| Affiliation: Physical Research Laboratory, Ahmedabad |
| Conference ID: ASI2026_730 |
| Title: Design and Development of Medium Resolution Spectrograph “SAGAR” to Study the stellar activities in M-Dwarfs |
| Abstract Type: Poster |
| Abstract Category: Facilities, Technologies and Data science |
| Author(s) and Co-Author(s) with Affiliation: Kapil Kumar Bharadwaj(Physical Research Laboratory, Ahmedabad), Neelam Prasad(Physical Research Laboratory, Ahmedabad), Abhijit Chakraborty(Physical Research Laboratory, Ahmedabad) |
| Abstract: M-dwarfs dominate the stellar population of the Galaxy and are key targets for exoplanet and habitability studies. However, their strong magnetic activity introduces significant challenges in interpreting planetary signals and assessing atmospheric stability. To address this, we are developing a medium-resolution optical spectrograph optimized for the systematic study of stellar activity in M-dwarfs. The instrument is designed to operate at a spectral resolution of R ≈ 30,000 over a broad wavelength range of 450–920 nm, enabling simultaneous access to key activity diagnostics such as Hα, Ca II infrared triplet, He I, and molecular bands.
In this talk, I will present the optical, opto-mechanical, and thermal design of the spectrograph, along with its expected performance and scientific capabilities. This instrument will serve as a dedicated facility for long-term monitoring of M-dwarf activity and as a pathfinder for future high-precision spectroscopic instruments. |
