| Name: | Amirul Hasan |
| Affiliation: | Indian Institute of Astrophysics, Bengaluru |
| Conference ID: | ASI2025_686 |
| Title: | Study of High-Efficiency Fore-Optics Design for the High-Resolution Optical Spectrograph (HROS) on the Thirty Meter Telescope |
| Authors: | Amirul Hasan(1,2), Dr Vineeth Valsan(1), Dr. Sivarani Thirupathi(2),Dr. Ramya Sethuram(2),Dr Arun Surya(2), Dr. Ramya Sethuram(1), Dr. Arun Surya(1) |
| Authors Affiliation: | 1. Christ University, Bengaluru
2. Indian Institute of Astrophysics, Bengaluru |
| Mode of Presentation: | Poster |
| Abstract Category: | Facilities, Technologies and Data science |
| Abstract: | The Thirty Meter Telescope (TMT) is expected to be one of the most powerful ground-based observatories of the next decade that is carefully designed to answer the pressing scientific questions of Astronomy. India plays a crucial role in the TMT project, contributing significantly to its development and taking the lead in designing the second-generation seeing limited High-Resolution Optical Spectrograph (HROS). This spectrograph, proposed based on a white-pupil design, incorporates both slit and fiber-fed options and spans a wavelength range of 310 nm to 1100 nm. With observing modes offering resolutions from 20,000 to 100,000, HROS stands out for its ability to capture emissions in the ultraviolet range, particularly valuable for studying hot stellar objects. HROS is uniquely designed to address a range of key science drivers, including stellar archaeology, inter- and circumgalactic medium (IGM/CGM) studies, exoplanet transit spectroscopy. Its ability to observe down to 310nm and the resolution range it offers, makes it a unique spectrograph in comparison to similar spectrograph designs, ArmazoNes high Dispersion Echelle Spectrograph (ANDES) at the Extremely Large Telescope (ELT) and the GMT-Consortium Large Earth Finder (GCLEF) at the Giant Magellan Telescope (GMT). HROS achieves various resolution settings solely through fore-optics modifications, eliminating the need for complex reconfigurations. This efficient fore-optics design enables high throughput, especially at UV wavelengths critical to HROS’s objectives. This paper presents a detailed exploration of the current state of high-resolution spectrograph optics and presents an optimized fore-optics design configuration for HROS, enhancing its performance for challenging observations in the 310 nm regime.
|
