The vegetation red edge spectroscopic feature as a surface biomarker

S. Seager, E. B. Ford

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Citation (Scopus)

Abstract

The search for Earth-like extrasolar planets is in part motivated by the potential detection of spectroscopic biomarkers. Spectroscopic biomarkers are spectral features that are either consistent with life, indicative of habitability, or provide clues to a planet's habitability. Most attention so far has been given to atmospheric biomarkers, gases such as O2, O3, H2O, CO, and CH4. Here we discuss surface biomarkers. Surface biomarkers that have large, distinct, abrupt changes in their spectra may be detectable in an extrasolar planet's spectrum at wavelengths that penetrate to the planetary surface. Earth has such a surface biomarker: the vegetation “red edge” spectroscopic feature. Recent interest in Earth's surface biomarker has motivated Earthshine observations of the spatially unresolved Earth and two recent studies may have detected the vegetation red edge feature in Earth's hemispherically integrated spectrum. A photometric time series in different colors should help in detecting unusual surface features in extrasolar Earth-like planet spectra. Introduction One hundred extrasolar giant planets are currently known to orbit nearby sun-like stars. These planets have been detected by the radial velocity method and so, with the exception of the one transiting planet, only the minimum mass and orbital parameters are known. Many plans are underway to learn more about extrasolar planets' physical properties from ground-based and space-based observations and via proposed or planned space missions. Direct detection of scattered or thermally emitted light from the planet itself is the only way to learn about a variety of the planet's physical characteristics.

Original languageEnglish (US)
Title of host publicationAstrophysics of Life
Subtitle of host publicationProceedings of the Space Telescope Science Institute Symposium, held in Baltimore, Maryland May 6-9, 2002
PublisherCambridge University Press
Pages67-75
Number of pages9
Volume9780521824903
ISBN (Electronic)9780511536113
ISBN (Print)0521824907, 9780521824903
DOIs
StatePublished - Jan 1 2005

Fingerprint

biomarkers
vegetation
planets
extrasolar planets
habitability
planetary surfaces
Earth surface
space missions
radial velocity
sun
physical properties
orbits
color
stars
orbitals
gases
wavelengths

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Seager, S., & Ford, E. B. (2005). The vegetation red edge spectroscopic feature as a surface biomarker. In Astrophysics of Life: Proceedings of the Space Telescope Science Institute Symposium, held in Baltimore, Maryland May 6-9, 2002 (Vol. 9780521824903, pp. 67-75). Cambridge University Press. https://doi.org/10.1017/CBO9780511536113.008
Seager, S. ; Ford, E. B. / The vegetation red edge spectroscopic feature as a surface biomarker. Astrophysics of Life: Proceedings of the Space Telescope Science Institute Symposium, held in Baltimore, Maryland May 6-9, 2002. Vol. 9780521824903 Cambridge University Press, 2005. pp. 67-75
@inbook{48f8a4ac8d5f4bd1bb7a2e833753713f,
title = "The vegetation red edge spectroscopic feature as a surface biomarker",
abstract = "The search for Earth-like extrasolar planets is in part motivated by the potential detection of spectroscopic biomarkers. Spectroscopic biomarkers are spectral features that are either consistent with life, indicative of habitability, or provide clues to a planet's habitability. Most attention so far has been given to atmospheric biomarkers, gases such as O2, O3, H2O, CO, and CH4. Here we discuss surface biomarkers. Surface biomarkers that have large, distinct, abrupt changes in their spectra may be detectable in an extrasolar planet's spectrum at wavelengths that penetrate to the planetary surface. Earth has such a surface biomarker: the vegetation “red edge” spectroscopic feature. Recent interest in Earth's surface biomarker has motivated Earthshine observations of the spatially unresolved Earth and two recent studies may have detected the vegetation red edge feature in Earth's hemispherically integrated spectrum. A photometric time series in different colors should help in detecting unusual surface features in extrasolar Earth-like planet spectra. Introduction One hundred extrasolar giant planets are currently known to orbit nearby sun-like stars. These planets have been detected by the radial velocity method and so, with the exception of the one transiting planet, only the minimum mass and orbital parameters are known. Many plans are underway to learn more about extrasolar planets' physical properties from ground-based and space-based observations and via proposed or planned space missions. Direct detection of scattered or thermally emitted light from the planet itself is the only way to learn about a variety of the planet's physical characteristics.",
author = "S. Seager and Ford, {E. B.}",
year = "2005",
month = "1",
day = "1",
doi = "10.1017/CBO9780511536113.008",
language = "English (US)",
isbn = "0521824907",
volume = "9780521824903",
pages = "67--75",
booktitle = "Astrophysics of Life",
publisher = "Cambridge University Press",
address = "United Kingdom",

}

Seager, S & Ford, EB 2005, The vegetation red edge spectroscopic feature as a surface biomarker. in Astrophysics of Life: Proceedings of the Space Telescope Science Institute Symposium, held in Baltimore, Maryland May 6-9, 2002. vol. 9780521824903, Cambridge University Press, pp. 67-75. https://doi.org/10.1017/CBO9780511536113.008

The vegetation red edge spectroscopic feature as a surface biomarker. / Seager, S.; Ford, E. B.

Astrophysics of Life: Proceedings of the Space Telescope Science Institute Symposium, held in Baltimore, Maryland May 6-9, 2002. Vol. 9780521824903 Cambridge University Press, 2005. p. 67-75.

Research output: Chapter in Book/Report/Conference proceedingChapter

TY - CHAP

T1 - The vegetation red edge spectroscopic feature as a surface biomarker

AU - Seager, S.

AU - Ford, E. B.

PY - 2005/1/1

Y1 - 2005/1/1

N2 - The search for Earth-like extrasolar planets is in part motivated by the potential detection of spectroscopic biomarkers. Spectroscopic biomarkers are spectral features that are either consistent with life, indicative of habitability, or provide clues to a planet's habitability. Most attention so far has been given to atmospheric biomarkers, gases such as O2, O3, H2O, CO, and CH4. Here we discuss surface biomarkers. Surface biomarkers that have large, distinct, abrupt changes in their spectra may be detectable in an extrasolar planet's spectrum at wavelengths that penetrate to the planetary surface. Earth has such a surface biomarker: the vegetation “red edge” spectroscopic feature. Recent interest in Earth's surface biomarker has motivated Earthshine observations of the spatially unresolved Earth and two recent studies may have detected the vegetation red edge feature in Earth's hemispherically integrated spectrum. A photometric time series in different colors should help in detecting unusual surface features in extrasolar Earth-like planet spectra. Introduction One hundred extrasolar giant planets are currently known to orbit nearby sun-like stars. These planets have been detected by the radial velocity method and so, with the exception of the one transiting planet, only the minimum mass and orbital parameters are known. Many plans are underway to learn more about extrasolar planets' physical properties from ground-based and space-based observations and via proposed or planned space missions. Direct detection of scattered or thermally emitted light from the planet itself is the only way to learn about a variety of the planet's physical characteristics.

AB - The search for Earth-like extrasolar planets is in part motivated by the potential detection of spectroscopic biomarkers. Spectroscopic biomarkers are spectral features that are either consistent with life, indicative of habitability, or provide clues to a planet's habitability. Most attention so far has been given to atmospheric biomarkers, gases such as O2, O3, H2O, CO, and CH4. Here we discuss surface biomarkers. Surface biomarkers that have large, distinct, abrupt changes in their spectra may be detectable in an extrasolar planet's spectrum at wavelengths that penetrate to the planetary surface. Earth has such a surface biomarker: the vegetation “red edge” spectroscopic feature. Recent interest in Earth's surface biomarker has motivated Earthshine observations of the spatially unresolved Earth and two recent studies may have detected the vegetation red edge feature in Earth's hemispherically integrated spectrum. A photometric time series in different colors should help in detecting unusual surface features in extrasolar Earth-like planet spectra. Introduction One hundred extrasolar giant planets are currently known to orbit nearby sun-like stars. These planets have been detected by the radial velocity method and so, with the exception of the one transiting planet, only the minimum mass and orbital parameters are known. Many plans are underway to learn more about extrasolar planets' physical properties from ground-based and space-based observations and via proposed or planned space missions. Direct detection of scattered or thermally emitted light from the planet itself is the only way to learn about a variety of the planet's physical characteristics.

UR - http://www.scopus.com/inward/record.url?scp=84928861345&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84928861345&partnerID=8YFLogxK

U2 - 10.1017/CBO9780511536113.008

DO - 10.1017/CBO9780511536113.008

M3 - Chapter

AN - SCOPUS:84928861345

SN - 0521824907

SN - 9780521824903

VL - 9780521824903

SP - 67

EP - 75

BT - Astrophysics of Life

PB - Cambridge University Press

ER -

Seager S, Ford EB. The vegetation red edge spectroscopic feature as a surface biomarker. In Astrophysics of Life: Proceedings of the Space Telescope Science Institute Symposium, held in Baltimore, Maryland May 6-9, 2002. Vol. 9780521824903. Cambridge University Press. 2005. p. 67-75 https://doi.org/10.1017/CBO9780511536113.008