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Open AccessArticle
Compact Spatial Heterodyne Spectrographs for Future Space-Based Observations: Instrument Modeling and Applications
by
Ayan Sahoo
Ayan Sahoo
Ayan Sahoo is pursuing a BS-MS Dual in Physics at IISER Kolkata, India. He was a research intern at [...]
Ayan Sahoo is pursuing a BS-MS Dual in Physics at IISER Kolkata, India. He was a research intern at the Australian National University, Australia (2023), where he worked on astronomical instrumentation and developed a model for a Spatial Heterodyne Spectrograph. He is also a Mitacs research intern at the University of Western Ontario, Canada (2024), working on spectroscopy of molecular lines in the Interstellar medium.He is also interested in research related to adaptive optics. He will join as a Master's thesis student at the Indian Institute of Astrophysics, India, working on developing adaptive optics systems.
1,2,*,
Joice Mathew
Joice Mathew 2,*
,
Andrew Battisti
Andrew Battisti
Andrew Battisti is a Research Fellow in the Research School
of Astronomy and Astrophysics (RSAA) at [...]
Andrew Battisti is a Research Fellow in the Research School
of Astronomy and Astrophysics (RSAA) at the Australian National University and
the University of Western Australia International Centre for Radio Astronomy
Research (ICRAR). He received his B.Sc. in Astronomy (with Honors) and Physics
from Stony Brook University in 2010 and his Ph.D. in Astronomy from the
University of Massachusetts in 2017. His research focuses on improving our
knowledge of how galaxies, and their constituent parts (e.g., stars, gas,
dust), evolve from the early Universe into the diverse population that exists
today. In particular, he is interested in improving our understanding of how
interstellar dust impacts observations of galaxies and also expanding various
aspects of the spectral modeling code MAGPHYS (Multi-wavelength Analysis of
Galaxy Physical Properties).
3,4
and
Brad Tucker
Brad Tucker 3
1
Department of Physical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India
2
Advanced Instrumentation and Technology Centre, Research School of Astronomy and Astrophysics, Australian National University, Canberra, ACT 2611, Australia
3
Research School of Astronomy and Astrophysics, Australian National University, Canberra, ACT 2611, Australia
4
ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D), Australia
*
Authors to whom correspondence should be addressed.
Sensors 2024, 24(14), 4709; https://doi.org/10.3390/s24144709 (registering DOI)
Submission received: 13 June 2024
/
Revised: 17 July 2024
/
Accepted: 18 July 2024
/
Published: 20 July 2024
Abstract
High-resolution spectroscopy employing spatial heterodyne spectrographs (SHS) holds significant promise for forthcoming space missions, building upon its established track record in science applications. Notably, it offers exceptional performance and cost- effectiveness in the ultraviolet-visual (UV-Vis) region compared to contemporary instruments. SHS instruments provide high-resolution capabilities and substantially larger etendues than similar resolving power instruments. This study introduces a comprehensive Python-based SHS model integrated with a user-friendly web scraping interface for target star selection, parameter generation, and 2D interferogram creation. Our SHS model demonstrates double the resolving power of a grating spectrometer and a throughput comparable to a Fourier transform spectrometer (FTS) but without moving parts, enhancing robustness for deployment in space. The interferogram processing algorithm includes flat-fielding, bias removal, apodization, and an inverse Fourier transform (IFT) for accurate spectrum retrieval. Despite bandwidth limitations due to resolving power constraints, SHS models excel in applications requiring high spectral resolution over narrow wavelength ranges, such as studying isotopic emission lines. The model provides optimization results and trade-offs for system parameters, ensuring precise spectral recovery with realistic signal-to-noise ratio (SNR) values. SHS is versatile and effective for various scientific applications, including investigating atomic and molecular emissions from comets, planetary atmospheres, the Earth’s atmosphere, the Sun, and the interstellar medium (ISM). This research significantly contributes to expediting the development and deployment of SHS instruments, demonstrating their potential across numerous scientific domains.
Share and Cite
MDPI and ACS Style
Sahoo, A.; Mathew, J.; Battisti, A.; Tucker, B.
Compact Spatial Heterodyne Spectrographs for Future Space-Based Observations: Instrument Modeling and Applications. Sensors 2024, 24, 4709.
https://doi.org/10.3390/s24144709
AMA Style
Sahoo A, Mathew J, Battisti A, Tucker B.
Compact Spatial Heterodyne Spectrographs for Future Space-Based Observations: Instrument Modeling and Applications. Sensors. 2024; 24(14):4709.
https://doi.org/10.3390/s24144709
Chicago/Turabian Style
Sahoo, Ayan, Joice Mathew, Andrew Battisti, and Brad Tucker.
2024. "Compact Spatial Heterodyne Spectrographs for Future Space-Based Observations: Instrument Modeling and Applications" Sensors 24, no. 14: 4709.
https://doi.org/10.3390/s24144709
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