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Solar UV Radiation and the Origin of Life On EarthWe have embarked on a program aimed at understanding the atmosphere of the early Earth, because of its importance as a greenhouse, radiation shield and energy source for life. Here, we give a progress report on the first phase of this program to establish the UV radiation from the early Sun. We have obtained ultraviolet spectra (STIS, FUSE, EUVE) of carefully selected nearby, young solar-type stars, which act as surrogates for the early Sun We are making detailed non-LTE analyses of the spectra and constructing models of their photospheres + chromospheres. Once validated, these models will allow us to extrapolate our theoretical spectra to other metallicities and to unobserved spectral regions.
Document ID
20020083234
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Heap, S. R.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Lanz, T.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Hubeny, I.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Gaidos, E.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Oegerle, William R.
Date Acquired
August 20, 2013
Publication Date
January 1, 2002
Subject Category
Solar Physics
Meeting Information
Meeting: Origins 2002: The Heavy Element Trail from Galaxies to Habitable Worlds
Location: Jackson Hole, WY
Country: United States
Start Date: May 26, 2002
End Date: May 29, 2002
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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