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Influence of higher atmospheric pressure on the Martian radiation environment: Implications for possible habitability in the Noachian epoch

Ehresmann, B. and Burmeister, S. and Wimmer-Schweingruber, R. F. and Reitz, G. (2011) Influence of higher atmospheric pressure on the Martian radiation environment: Implications for possible habitability in the Noachian epoch. Journal of Geophysical Research, 116 / epub ahead of print (A10106). American Geophysical Union. DOI: 10.1029/2011JA016616 .

Full text not available from this repository.

Abstract

The Noachian epoch (∼4.5–3.5 billion years ago) is a promising era for a possible emergence of life on Mars. The presence of runoff channels in areas formed during the Noachian suggests that liquid water existed at least sporadically during that time, with liquid water being regarded as a prerequisite for life. To have sustained liquid water, the atmospheric pressure on Noachian Mars must have been significantly higher than in the present. When considering the possibility of life on Noachian Mars, one conceivable restriction is given by the ionising radiation environment. Using PLANETOCOSMICS- and Geant4-simulation codes, we calculate the radiation environment on the Martian surface and the resulting radiation exposure for different atmospheric conditions. Here, we present absorbed dose and dose equivalent rates resulting from galactic-cosmic-proton and alpha-particle-induced radiation environments, as well as changes of these rates caused by an increase of atmospheric pressure.

Document Type:Article
Title:Influence of higher atmospheric pressure on the Martian radiation environment: Implications for possible habitability in the Noachian epoch
Authors:
AuthorsInstitution or Email of Authors
Ehresmann, B. Institute for Experimental and Applied Physics, Christian Albrechts University Kiel, Kiel, Germany
Burmeister, S. Institute for Experimental and Applied Physics, Christian Albrechts University Kiel, Kiel, Germany
Wimmer-Schweingruber, R. F. Institute for Experimental and Applied Physics, Christian Albrechts University Kiel, Kiel, Germany
Reitz, G. Institute of Aerospace Medicine, Radiation Biology, German Aerospace Center, Cologne, Germany
Date:2011
Journal or Publication Title:Journal of Geophysical Research
Refereed publication:Yes
In Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:116 / epub ahead of print
DOI:10.1029/2011JA016616
Publisher:American Geophysical Union
Status:Published
Keywords:Noachian radiation environment, Mars, ionising radiation environment, higher atmospheric pressure, PLANETOCOSMICS- and Geant4-simulation codes
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):R - Vorhaben Strahlenbiologie
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Radiation Biology
Deposited By: Kerstin Kopp
Deposited On:15 Dec 2011 14:22
Last Modified:23 Jan 2014 11:36

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