Cited by 25Space Science and Extraterrestrial LifeOrigins and Evolution of LifeStellar, planetary, and galactic studies

Role of stellar physics in regulating the critical steps for life

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Lingam, Manasvi, Loeb, Abraham·2019·International Journal of Astrobiology

Abstract

We use the critical step model to study the major transitions in evolution on Earth. We find that a total of five steps represents the most plausible estimate, in agreement with previous studies, and use the fossil record to identify the potential candidates. We apply the model to Earth-analogs around stars of different masses by incorporating the constraints on habitability set by stellar physics including the habitable zone lifetime, availability of ultraviolet radiation for prebiotic chemistry, and atmospheric escape. The critical step model suggests that the habitability of Earth-analogs around M-dwarfs is significantly suppressed. The total number of stars with planets containing detectable biosignatures of microbial life is expected to be highest for K-dwarfs. In contrast, we find that the corresponding value for intelligent life (technosignatures) should be highest for solar-mass stars. Thus, our work may assist in the identification of suitable targets in the search for biosignatures and technosignatures.

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Crossref · 10.1017/s1473550419000016

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89 of 89 references verified0 citation errors · 0 not checkable

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  • There may be an anthropic selection effect favoring earlier abiogenesis on Earth, because an intelligent life must emerge before the increasing solar luminosity causes an end to Earth's habitable state.

    “There may also be an anthropic selection effect favoring earlier abiogenesis on Earth, because an intelligent life must emerge before the increasing solar luminosity causes an end to Earth’s habitable state (estimated to be ~1 Gyr in future)31.”

    From Emergence of life in an inflationary universe (2020) · cites this paper as [31]

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  • Emergence of life in an inflationary universe

    Totani, T. (2020) · Scientific Reports · doi:10.1038/s41598-020-58060-0 · Cited by 29 · see citing works

    “ffect favoring earlier abiogenesis on Earth, because an intelligent life must emerge before the increasing solar luminosity causes an end to Earth’s habitable state (estimated to be ∼ 1 Gyr in future) [30]. For the case of a low abiogenesis rate, the number of abiogenesis events is often considered in the Milky Way Gal…”
    Background

Authors
Lingam, M., & Loeb, A.
Affiliations
Harvard University (US)
Corresponding author
Lingam, Manasvi
Venue
International Journal of Astrobiology
Published
2019-03-27
Volume
18
Issue
6
Pages
527-546
ISSN
  • 1473-5504 (ISSN-L)
  • 1475-3006
OpenAlex
W2795482385
Cited by
25
References
89
Citations by year
2026: 1 · 2025: 4 · 2024: 1 · 2023: 3 · 2021: 4 · 2020: 5 · 2019: 6 · 2018: 1
FWCI
2.00
Type
journal article
Language
en
Open access
Locations
  • International Journal of Astrobiology (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • arXiv (Cornell University)
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Space Science and Extraterrestrial Life
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Origins and Evolution of Life
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Stellar, planetary, and galactic studies
Keywords
origin of life, major transitions, habitability, M dwarfs, K dwarfs, stellar mass, ultraviolet radiation, prebiotic chemistry, atmospheric escape, biosignatures, technosignatures, Earth analogs, search for life

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