Slitless spectroscopy simulations of Milky Way dwarf satellite galaxies using TMT-WFOS

Devika K. Divakar; Sivarani Thirupathi; Ramya Sethuram; Jason Fucik; Chuck Steidel; Manjunath Bestha; Prasanna Deshmukh

doi:10.1117/12.3019070

23 August 2024 Slitless spectroscopy simulations of Milky Way dwarf satellite galaxies using TMT-WFOS

Devika K. Divakar, Sivarani Thirupathi, Ramya Sethuram, Jason Fucik, Chuck Steidel, Manjunath Bestha, Prasanna Deshmukh

Author Affiliations +

Proceedings Volume 13099, Modeling, Systems Engineering, and Project Management for Astronomy XI; 130992C (2024) https://doi.org/10.1117/12.3019070
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

Wide Field Optical Spectrograph (WFOS) is the first light instrument of Thirty Meter Telescope (TMT), which will be one of the wide field spectrographs for optical spectroscopy and can probe the faintest limits. In order to reach the faintest limits provided by the aperture of TMT, WFOS is designed to have multi-object slit-based spectrograph. WFOS can observe about ~60 objects in a given exposure and cover the full wavelength range in low resolution (R~1500) observing mode. Slitless spectroscopy has been popular in space based instruments, however it is not pursued in ground based observatories due to the background contamination. Considering large plate scale of TMT and oversampling of seeing disk we will be able to extract the individual spectra from WFOS slitless observing mode. Here we present the feasibility of slitless mode of TMT-WFOS and the sensitivity limit for various field densities focusing on MilkyWay satellite galaxies. We study the background contamination due to the bright targets and the density distribution of the satellite galaxy fields.

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

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Devika K. Divakar, Sivarani Thirupathi, Ramya Sethuram, Jason Fucik, Chuck Steidel, Manjunath Bestha, and Prasanna Deshmukh "Slitless spectroscopy simulations of Milky Way dwarf satellite galaxies using TMT-WFOS", Proc. SPIE 13099, Modeling, Systems Engineering, and Project Management for Astronomy XI, 130992C (23 August 2024); https://doi.org/10.1117/12.3019070

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