Biology
Scientific paper
Nov 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.518..365s&link_type=abstract
In: Proceedings of the First European Workshop on Exo-Astrobiology, 16 - 19 September 2002, Graz, Austria. Ed.: Huguette Lacoste
Biology
2
Extra-Solar Planets: Space Research, Detection
Scientific paper
The spectroscopic characterization of Earth-like exoplanets is one of the goals shared by two major projects: Darwin (ESA) and TPF-Terrestrrial Planet Finder (NASA). By producing low resolution spectra of the planetary thermal emission, they will be able to detect the 9.6 μm band of O3 which may be the signature of an O2-rich atmosphere sustained by a biological activity. In this paper, we review several studies focusing on the possible use of this ozone signature as a biomarker for terrestrial exoplanets. First, we stress the risk of false positive detection produced by abiotic photochemical production of O2 and O3 and we show how to filter these imposters out by selecting only the simultaneous detection of O3-CO2-H2O (triple signature). In a second part, we investigate the false negative cases: when O2-rich atmospheres do not exhibit the O3 feature. This happens when the partial pressure of CO2 is too high or, unexpectedly, when the O3 layer is too dense. Eventually, we present other eventual biomarkers that could trace life where O3 fails.
No associations
LandOfFree
Exo-/astrobiology with a Darwin/TPF mission does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Exo-/astrobiology with a Darwin/TPF mission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exo-/astrobiology with a Darwin/TPF mission will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-739399