High-Resolution Echelle Spectroscopy for Solar System Planets: A Planet-as-Point-Source Analogy
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866911228292497408 |
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| author | Menon, Parvathy T, Sivarani S, Sriram Bestha, Manjunath Divakar, Devika K P, Rajaguru S Surya, Arun |
| author_facet | Menon, Parvathy T, Sivarani S, Sriram Bestha, Manjunath Divakar, Devika K P, Rajaguru S Surya, Arun |
| contents | Transmission spectroscopy has proven to be an effective technique for characterizing exoplanet atmospheres. However, transmission spectroscopy requires planetary transits, which occur for only a small fraction of planetary systems due to geometric alignment constraints; hence, characterizing exoplanets through their reflected spectrum of host stars will be helpful for a large number of exoplanets. The upcoming extremely large telescopes (ELTs) will be able to study the reflected spectra of exoplanets. Here, we present a preliminary optical design and a detailed throughput analysis of the instrumentation that interfaces the 2.34 m Vainu Bappu Telescope prime focus to an existing high-resolution echelle spectrograph with disk-integrated light from solar system objects. One of the primary objectives is to obtain high-resolution, high signal-to-noise reflected spectra from the solar system objects. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2510_20559 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | High-Resolution Echelle Spectroscopy for Solar System Planets: A Planet-as-Point-Source Analogy Menon, Parvathy T, Sivarani S, Sriram Bestha, Manjunath Divakar, Devika K P, Rajaguru S Surya, Arun Earth and Planetary Astrophysics Instrumentation and Methods for Astrophysics Transmission spectroscopy has proven to be an effective technique for characterizing exoplanet atmospheres. However, transmission spectroscopy requires planetary transits, which occur for only a small fraction of planetary systems due to geometric alignment constraints; hence, characterizing exoplanets through their reflected spectrum of host stars will be helpful for a large number of exoplanets. The upcoming extremely large telescopes (ELTs) will be able to study the reflected spectra of exoplanets. Here, we present a preliminary optical design and a detailed throughput analysis of the instrumentation that interfaces the 2.34 m Vainu Bappu Telescope prime focus to an existing high-resolution echelle spectrograph with disk-integrated light from solar system objects. One of the primary objectives is to obtain high-resolution, high signal-to-noise reflected spectra from the solar system objects. |
| title | High-Resolution Echelle Spectroscopy for Solar System Planets: A Planet-as-Point-Source Analogy |
| topic | Earth and Planetary Astrophysics Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2510.20559 |