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Towards astrobiological experimental approaches to study planetary UV surface environments

Published online by Cambridge University Press:  13 January 2020

Ximena C. Abrevaya ,
Martin Leitzinger ,
Oscar J. Oppezzo ,
Petra Odert ,
G. Juan M. Luna ,
Manish Patel ,
Ana F. Forte-Giacobone  and
Arnold Hanslmeier
Ximena C. Abrevaya
Affiliation:
Instituto de Astronoma y Fsica del Espacio (UBA-CONICET) Ciudad Autónoma de Buenos Aires, Argentina. email: abrevaya@iafe.uba.ar Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires Ciudad Autónoma de Buenos Aires, Argentina.
Martin Leitzinger
Affiliation:
Institute of Physics, IGAM, University of Graz, Austria.
Oscar J. Oppezzo
Affiliation:
Departamento de Radiobiologa, Comisión Nacional de Energa Atómica. Buenos Aires, Argentina.
Petra Odert
Affiliation:
Institute of Physics, IGAM, University of Graz, Austria.
G. Juan M. Luna
Affiliation:
Instituto de Astronoma y Fsica del Espacio (UBA-CONICET) Ciudad Autónoma de Buenos Aires, Argentina. email: abrevaya@iafe.uba.ar Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires Ciudad Autónoma de Buenos Aires, Argentina.
Manish Patel
Affiliation:
School of Physical Sciences, The Open University, Milton Keynes, MK7 6AA, U.K.
Ana F. Forte-Giacobone
Affiliation:
Departamento de Radiobiologa, Comisión Nacional de Energa Atómica. Buenos Aires, Argentina. Departamento de Ingeniera, Universidad Nacional de Tres de Febrero. Buenos Aires, Argentina.
Arnold Hanslmeier
Affiliation:
Institute of Physics, IGAM, University of Graz, Austria.
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Abstract

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The stellar ultraviolet radiation (UVR) has been studied in the last decade and has been found to be an important factor to determine the habitability of planetary surfaces. It is known that UVR can be a constraint for life. However, most of the studies of UVR and habitability have missed some fundamental aspects: i) Accurate estimation of the planetary atmospheric attenuation, ii) The biological inferences used to represent the impact of the stellar UVR on life are theoretical and based on the action spectrum (for DNA or microorganisms) or considering parameters as the “lethal dose” obtained from non-astrobiological experiments. Therefore, the conclusions reached by previous studies about the UVR habitability of planetary bodies may be inaccurate. In this work, we propose how to address these studies in a more accurate way through an interdisciplinary approach that combines astrophysics, microbiology, and photobiology and by the use of specially designed laboratory experiments.

Keywords

stars: activityultraviolet: starsmethods: laboratoryastrobiology
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S345: Origins: From the Protosun to the First Steps of Life , August 2018 , pp. 222 - 226
Copyright
© International Astronomical Union 2020 

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