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UV surface environment of Earth-like planets orbiting FGKM stars through geological evolution

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UV surface environment of Earth-like planets orbiting FGKM stars through geological evolution. / Rugheimer, S.; Segura, A.; Kaltenegger, L.; Sasselov, D.

In: Astrophysical Journal, Vol. 806, No. 1, 137, 12.06.2015.

Research output: Contribution to journalArticle

Harvard

Rugheimer, S, Segura, A, Kaltenegger, L & Sasselov, D 2015, 'UV surface environment of Earth-like planets orbiting FGKM stars through geological evolution' Astrophysical Journal, vol. 806, no. 1, 137. https://doi.org/10.1088/0004-637X/806/1/137

APA

Rugheimer, S., Segura, A., Kaltenegger, L., & Sasselov, D. (2015). UV surface environment of Earth-like planets orbiting FGKM stars through geological evolution. Astrophysical Journal, 806(1), [137]. https://doi.org/10.1088/0004-637X/806/1/137

Vancouver

Rugheimer S, Segura A, Kaltenegger L, Sasselov D. UV surface environment of Earth-like planets orbiting FGKM stars through geological evolution. Astrophysical Journal. 2015 Jun 12;806(1). 137. https://doi.org/10.1088/0004-637X/806/1/137

Author

Rugheimer, S. ; Segura, A. ; Kaltenegger, L. ; Sasselov, D. / UV surface environment of Earth-like planets orbiting FGKM stars through geological evolution. In: Astrophysical Journal. 2015 ; Vol. 806, No. 1.

Bibtex - Download

@article{d22f76da69d74aeda836017ca4232596,
title = "UV surface environment of Earth-like planets orbiting FGKM stars through geological evolution",
abstract = "The UV environment of a host star affects the photochemistry in the atmosphere, and ultimately the surface UV environment for terrestrial planets and therefore the conditions for the origin and evolution of life. We model the surface UV radiation environment for Earth-sized planets orbiting FGKM stars in the circumstellar Habitable Zone for Earth through its geological evolution. We explore four different types of atmospheres corresponding to an early-Earth atmosphere at 3.9 Gyr ago and three atmospheres covering the rise of oxygen to present-day levels at 2.0 Gyr ago, 0.8 Gyr ago, and modern Earth. In addition to calculating the UV flux on the surface of the planet, we model the biologically effective irradiance, using DNA damage as a proxy for biological damage. We find that a pre-biotic Earth (3.9 Gyr ago) orbiting an F0V star receives 6 times the biologically effective radiation as around the early Sun and 3520 times the modern Earth-Sun levels. A pre-biotic Earth orbiting GJ 581 (M3.5 V) receives 300 times less biologically effective radiation, about 2 times modern Earth-Sun levels. The UV fluxes calculated here provide a grid of model UV environments during the evolution of an Earth-like planet orbiting a range of stars. These models can be used as inputs into photo-biological experiments and for pre-biotic chemistry and early life evolution experiments.",
keywords = "Astrobiology, Earth, Planets and satellites: surfaces, Planets and satellites: terrestrial planets",
author = "S. Rugheimer and A. Segura and L. Kaltenegger and D. Sasselov",
note = "The authors would also like to acknowledge support from DFG funding ENP KA 3142/1-1 and the Simons Foundation (290357, Kaltenegger and 290360, Sasselov).",
year = "2015",
month = "6",
day = "12",
doi = "10.1088/0004-637X/806/1/137",
language = "English",
volume = "806",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "American Astronomical Society",
number = "1",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - UV surface environment of Earth-like planets orbiting FGKM stars through geological evolution

AU - Rugheimer, S.

AU - Segura, A.

AU - Kaltenegger, L.

AU - Sasselov, D.

N1 - The authors would also like to acknowledge support from DFG funding ENP KA 3142/1-1 and the Simons Foundation (290357, Kaltenegger and 290360, Sasselov).

PY - 2015/6/12

Y1 - 2015/6/12

N2 - The UV environment of a host star affects the photochemistry in the atmosphere, and ultimately the surface UV environment for terrestrial planets and therefore the conditions for the origin and evolution of life. We model the surface UV radiation environment for Earth-sized planets orbiting FGKM stars in the circumstellar Habitable Zone for Earth through its geological evolution. We explore four different types of atmospheres corresponding to an early-Earth atmosphere at 3.9 Gyr ago and three atmospheres covering the rise of oxygen to present-day levels at 2.0 Gyr ago, 0.8 Gyr ago, and modern Earth. In addition to calculating the UV flux on the surface of the planet, we model the biologically effective irradiance, using DNA damage as a proxy for biological damage. We find that a pre-biotic Earth (3.9 Gyr ago) orbiting an F0V star receives 6 times the biologically effective radiation as around the early Sun and 3520 times the modern Earth-Sun levels. A pre-biotic Earth orbiting GJ 581 (M3.5 V) receives 300 times less biologically effective radiation, about 2 times modern Earth-Sun levels. The UV fluxes calculated here provide a grid of model UV environments during the evolution of an Earth-like planet orbiting a range of stars. These models can be used as inputs into photo-biological experiments and for pre-biotic chemistry and early life evolution experiments.

AB - The UV environment of a host star affects the photochemistry in the atmosphere, and ultimately the surface UV environment for terrestrial planets and therefore the conditions for the origin and evolution of life. We model the surface UV radiation environment for Earth-sized planets orbiting FGKM stars in the circumstellar Habitable Zone for Earth through its geological evolution. We explore four different types of atmospheres corresponding to an early-Earth atmosphere at 3.9 Gyr ago and three atmospheres covering the rise of oxygen to present-day levels at 2.0 Gyr ago, 0.8 Gyr ago, and modern Earth. In addition to calculating the UV flux on the surface of the planet, we model the biologically effective irradiance, using DNA damage as a proxy for biological damage. We find that a pre-biotic Earth (3.9 Gyr ago) orbiting an F0V star receives 6 times the biologically effective radiation as around the early Sun and 3520 times the modern Earth-Sun levels. A pre-biotic Earth orbiting GJ 581 (M3.5 V) receives 300 times less biologically effective radiation, about 2 times modern Earth-Sun levels. The UV fluxes calculated here provide a grid of model UV environments during the evolution of an Earth-like planet orbiting a range of stars. These models can be used as inputs into photo-biological experiments and for pre-biotic chemistry and early life evolution experiments.

KW - Astrobiology

KW - Earth

KW - Planets and satellites: surfaces

KW - Planets and satellites: terrestrial planets

U2 - 10.1088/0004-637X/806/1/137

DO - 10.1088/0004-637X/806/1/137

M3 - Article

VL - 806

JO - Astrophysical Journal

T2 - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 1

M1 - 137

ER -

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ID: 246493232