Evangelos Christou

Evangelos Christou

Research Title

Martian Fluid Compositions: The Habitability of Two Ancient Environments

Research Summary

We know that Mars once had abundant surface fluids and a thicker atmosphere and there is even evidence of current, transient fluid activity at the planet’s surface. These phenomena imply an appreciable astrobiological potential for Mars. My PhD research focuses on Martian Meteoritics and the Habitability of Early Mars. We are examining several groups of ancient Martian rocks (Martian meteorites) to determine the fluid compositions, model the hydrous activity and assess the bioenergetic potential of early martian aquatic environments.

Additional research investigates impact-cratering processes in the Solar System via impact-physics coding [iSALE computations] and thermodynamic simulations [HYDROTHERM & EQ3-6 codes] for the impact-induced hydrothermal and hydrous activity on terrestrial planets and icy planetary bodies. Further research work involves dynamic simulations for the planetary accretion of Mars by using high resolution astrodynamic computations [SWIFT code], coupling cosmochemical with astrophysical models for determining the dynamic evolution of the protosolar disk, and astrophysical computations for the formation of the habitable planets of our Solar System. 

Publications

  • Six Million Years of Hydrothermal Activity at Chicxulub? ; Pickersgill A.E. et al. (2019) NASA Astrophysics Data System: 2019LPICo2136.5082P. Large Meteorite Impacts and Planetary Evolution VI, proceedings of the conference held September 30-October 3, 2019 in Brasília, Brazil. LPI Contribution No. 2136, id.5082.
  • Controls on the Duration of Impact-Induced Hydrothermal Activity via Numerical Simulations; Christou E.V. et al. (2019) NASA Astrophysics Data System: 2019LPICo2136.5037C. Large Meteorite Impacts and Planetary Evolution VI, proceedings of the conference held September 30-October 3, 2019 in Brasília, Brazil. LPI Contribution No. 2136, id.5037.
  • Unusual Apatite in the Unusual Martian Meteorite NWA 8159; Christou E.V., Hallis L.J., Hayward C.L. and M.R. Lee (2019) NASA Astrophysics Data System: 2019LPICo2157.6283C. 82nd Annual Meeting of the Meteoritical Society, held 7-12 July, 2019 in Sapporo, Japan. LPI Contribution No. 2157, 2019, id.6283.

  • Post-Impact Habitability at the Chicxulub Crater; Christou E.V. and Bach W. (2019) NASA Astrophysics Data System: 2019LPICo2157.6100C. 82nd Annual Meeting of The Meteoritical Society, held 7-12 July, 2019 in Sapporo, Japan. LPI Contribution No. 2157, 2019, id.6100. 

  • Post-Impact Hydrothermal Activity. Thermodynamic Simulations on the Chicxulub Crater & Astrobiological Implications; Evangelos V. Christou and Wolfgang Bach; Abstract: EPSC2018-1175-1;Vol.12 (EPSC, 16-21 September 2018, Berlin).

  • Time Dependent Seismicity along the Western Coast of Canada; Evangelos V. Christou, George Karakaisis, Emmanuel ScordilisResearch in Geophysics_Vol.5_n.1_April 2016; doi:10.4081/rg.2016.5730.

 

Conference

  1. Scottish Planetary Science Network (SPERO) Meeting in Glasgow, UK (7-8 May 2019). Christou E.V. and Hallis L.J. (2019) Martian Fluid Compositions: The Habitability of Two Ancient Environments.

  2. Impacts and their Role in the Evolution of Life – Conference of the Nordic Network of Astrobiology in Tällberg, Siljan Crater Area, Sweden (10 - 13 June 2019). Christou et al. (2019) Controls on the Duration of Impact-Induced Hydrothermalism.

  3. Impacts and their Role in the Evolution of Life – Conference of the Nordic Network of Astrobiology in Tällberg, Siljan Crater Area, Sweden (10 - 13 June 2019). Christou et al. (2019) Post-Impact Habitability at the Chicxulub Crater.

  4. 82nd Meteoritical Society Meeting in Sapporo, Japan (8-12 July 2019). Christou E.V., Hallis L.J., Hayward C.L. and M.R. Lee (2019) Unusual Apatite in the Unusual Martian Meteorite NWA 8159; Abstract #6283.

  5. 82nd Meteoritical Society Meeting in Sapporo, Japan (8-12 July 2019). Christou E.V. and Bach W. (2019) Post-Impact Habitability at the Chicxulub Crater; Abstract # 6100.

  6. Large Meteorite Impacts & Planetary Evolution VI Meeting in Brazilia, Brazil (30 September - 3 October 2019). Christou et al. (2019) Controls on the Duration of Impact-Induced Hydrothermal Activity via Numerical Simulations. NASA Astrophysics Data System; 2019LPICo2136.5037C.

  7. European Planetary Science Congress 2018 _ Abstract: EPSC2018-1175-1;Vol.12 (EPSC, 16-21 September 2018, Berlin.