Advancement in narrow-band filters at LBC-like instruments for multiple star populations

Federico Battaini; Kalyan Kumar Radhakrishanan Santhakumari; Tania Sofia Gomes Machado; César Nesme; Dheeraj Malik

doi:10.1117/12.3020203

26 August 2024 Advancement in narrow-band filters at LBC-like instruments for multiple star populations

Federico Battaini, Kalyan Kumar Radhakrishanan Santhakumari, Tania Sofia Gomes Machado, César Nesme, Dheeraj Malik

Author Affiliations +

Proceedings Volume 13100, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI; 1310061 (2024) https://doi.org/10.1117/12.3020203
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

The narrow-band filters, based on thin layers of dielectric material, presents a blue shift of the transmission curve with larger angles from the normal. Fast and large field-of-view instruments limit the ability of such filters to select small spectral features that can highlight multiple star populations in globular clusters.

We hope to transform an instrument like the first-focus one of the LBT into the spearhead facility to identify the multiple populations in galactic globular clusters from the ground.

A new set of simulations has been developed to identify the best thin-layer filter to be used in order to separate populations with different light element abundances. We also built an optomechanical set-up to test the filter behavior in a LBC-like configuration. We present here the simulation strategy and some transmission curve obtained with the laboratory set-up.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Federico Battaini, Kalyan Kumar Radhakrishanan Santhakumari, Tania Sofia Gomes Machado, César Nesme, and Dheeraj Malik "Advancement in narrow-band filters at LBC-like instruments for multiple star populations", Proc. SPIE 13100, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI, 1310061 (26 August 2024); https://doi.org/10.1117/12.3020203

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