Ariel – a window to the origin of life on early earth?

Ferus, Martin and Adam, Vojtěch and Cassone, Giuseppe and Civiš, Svatopluk and Čuba, Václav and Chatzitheodoridis, Elias and Drtinová, Barbora and LeFloch, Bertrand and Heays, Alan and Jheeta, Sohan and Kereszturi, Ákos and Knížek, Antonín and Krůs, Miroslav and Kubelík, Petr and Lammer, Helmut and Lenža, Libor and Nejdl, Lukáš and Pastorek, Adam and Petera, Lukáš and Rimmer, Paul B. and Saladino, Raffaele and Saija, Franz and Sproß, Laurenz and Šponer, Jiří and Šponer, Judit and Todd, Zoe and Vaculovičová, Markéta and Zemánková, Kristýna and Chernov, Vladislav (2020) Ariel – a window to the origin of life on early earth? Experimental Astronomy. ISSN 0922-6435 DOI

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Is there life beyond Earth? An ideal research program would first ascertain how life on Earth began and then use this as a blueprint for its existence elsewhere. But the origin of life on Earth is still not understood, what then could be the way forward? Upcoming observations of terrestrial exoplanets provide a unique opportunity for answering this fundamental question through the study of other planetary systems. If we are able to see how physical and chemical environments similar to the early Earth evolve we open a window into our own Hadean eon, despite all information from this time being long lost from our planet’s geological record. A careful investigation of the chemistry expected on young exoplanets is therefore necessary, and the preparation of reference materials for spectroscopic observations is of paramount importance. In particular, the deduction of chemical markers identifying specific processes and features in exoplanetary environments, ideally “uniquely”. For instance, prebiotic feedstock molecules, in the form of aerosols and vapours, could be observed in transmission spectra in the near future whilst their surface deposits could be observed from reflectance spectra. The same detection methods also promise to identify particular intermediates of chemical and physical processes known to be prebiotically plausible. Is Ariel truly able to open a window to the past and answer questions concerning the origin of life on our planet and the universe? In this paper, we discuss aspects of prebiotic chemistry that will help in formulating future observational and data interpretation strategies for the Ariel mission. This paper is intended to open a discussion and motivate future detailed laboratory studies of prebiotic processes on young exoplanets and their chemical signatures.

Item Type: Article
Uncontrolled Keywords: 2020AREP; IA76
Subjects: 05 - Petrology - Igneous, Metamorphic and Volcanic Studies
Divisions: 05 - Petrology - Igneous, Metamorphic and Volcanic Studies
08 - Green Open Access
99 - Other
Journal or Publication Title: Experimental Astronomy
Identification Number:
Depositing User: Sarah Humbert
Date Deposited: 22 Dec 2020 19:49
Last Modified: 25 Nov 2021 01:01

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