Solid grains ejected from terrestrial exoplanets as a probe of the abundance of life in the Milky Way ...
Searching for extrasolar biosignatures is important to understand life on Earth and its origin. Astronomical observations of exoplanets may find such signatures, but it is difficult and may be impossible to claim unambiguous detection of life by remote sensing of exoplanet atmospheres. Here, another...
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ftdatacite:10.48550/arxiv.2210.07084 2023-07-23T04:15:52+02:00 Solid grains ejected from terrestrial exoplanets as a probe of the abundance of life in the Milky Way ... Totani, Tomonori 2022 https://dx.doi.org/10.48550/arxiv.2210.07084 https://arxiv.org/abs/2210.07084 unknown arXiv https://dx.doi.org/10.1017/s147355042300006x Creative Commons Attribution Non Commercial No Derivatives 4.0 International https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode cc-by-nc-nd-4.0 Earth and Planetary Astrophysics astro-ph.EP Astrophysics of Galaxies astro-ph.GA Populations and Evolution q-bio.PE FOS Physical sciences FOS Biological sciences Text article-journal ScholarlyArticle Article 2022 ftdatacite https://doi.org/10.48550/arxiv.2210.0708410.1017/s147355042300006x 2023-07-03T21:56:53Z Searching for extrasolar biosignatures is important to understand life on Earth and its origin. Astronomical observations of exoplanets may find such signatures, but it is difficult and may be impossible to claim unambiguous detection of life by remote sensing of exoplanet atmospheres. Here, another approach is considered: collecting grains ejected by asteroid impacts from exoplanets in the Milky Way and then traveling to the Solar System. The optimal grain size for this purpose is around 1 $μ$m, and though uncertainty is large, about $10^5$ such grains are expected to be accreting on Earth every year, which may contain biosignatures of life that existed on their home planets. These grains may be collected by detectors placed in space, or extracted from Antarctic ice or deep-sea sediments, depending on future technological developments. ... : 5 pages, no figure. Accepted for publication in International Journal of Astrobiology ... Text Antarc* Antarctic DataCite Metadata Store (German National Library of Science and Technology) Antarctic Milky Way ENVELOPE(-68.705,-68.705,-71.251,-71.251) |
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DataCite Metadata Store (German National Library of Science and Technology) |
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Earth and Planetary Astrophysics astro-ph.EP Astrophysics of Galaxies astro-ph.GA Populations and Evolution q-bio.PE FOS Physical sciences FOS Biological sciences |
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Earth and Planetary Astrophysics astro-ph.EP Astrophysics of Galaxies astro-ph.GA Populations and Evolution q-bio.PE FOS Physical sciences FOS Biological sciences Totani, Tomonori Solid grains ejected from terrestrial exoplanets as a probe of the abundance of life in the Milky Way ... |
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Earth and Planetary Astrophysics astro-ph.EP Astrophysics of Galaxies astro-ph.GA Populations and Evolution q-bio.PE FOS Physical sciences FOS Biological sciences |
description |
Searching for extrasolar biosignatures is important to understand life on Earth and its origin. Astronomical observations of exoplanets may find such signatures, but it is difficult and may be impossible to claim unambiguous detection of life by remote sensing of exoplanet atmospheres. Here, another approach is considered: collecting grains ejected by asteroid impacts from exoplanets in the Milky Way and then traveling to the Solar System. The optimal grain size for this purpose is around 1 $μ$m, and though uncertainty is large, about $10^5$ such grains are expected to be accreting on Earth every year, which may contain biosignatures of life that existed on their home planets. These grains may be collected by detectors placed in space, or extracted from Antarctic ice or deep-sea sediments, depending on future technological developments. ... : 5 pages, no figure. Accepted for publication in International Journal of Astrobiology ... |
format |
Text |
author |
Totani, Tomonori |
author_facet |
Totani, Tomonori |
author_sort |
Totani, Tomonori |
title |
Solid grains ejected from terrestrial exoplanets as a probe of the abundance of life in the Milky Way ... |
title_short |
Solid grains ejected from terrestrial exoplanets as a probe of the abundance of life in the Milky Way ... |
title_full |
Solid grains ejected from terrestrial exoplanets as a probe of the abundance of life in the Milky Way ... |
title_fullStr |
Solid grains ejected from terrestrial exoplanets as a probe of the abundance of life in the Milky Way ... |
title_full_unstemmed |
Solid grains ejected from terrestrial exoplanets as a probe of the abundance of life in the Milky Way ... |
title_sort |
solid grains ejected from terrestrial exoplanets as a probe of the abundance of life in the milky way ... |
publisher |
arXiv |
publishDate |
2022 |
url |
https://dx.doi.org/10.48550/arxiv.2210.07084 https://arxiv.org/abs/2210.07084 |
long_lat |
ENVELOPE(-68.705,-68.705,-71.251,-71.251) |
geographic |
Antarctic Milky Way |
geographic_facet |
Antarctic Milky Way |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
https://dx.doi.org/10.1017/s147355042300006x |
op_rights |
Creative Commons Attribution Non Commercial No Derivatives 4.0 International https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode cc-by-nc-nd-4.0 |
op_doi |
https://doi.org/10.48550/arxiv.2210.0708410.1017/s147355042300006x |
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1772177038715650048 |