Habitability around F-type stars

  title={Habitability around F-type stars},
  author={S. Sato and Manfred Cuntz and C. M. Guerra Olvera and Dennis Jack and K. P. Schr{\"o}der},
  journal={International Journal of Astrobiology},
  pages={244 - 258}
Abstract We explore the general astrobiological significance of F-type main-sequence stars with masses between 1.2 and 1.5 M⊙. Special consideration is given to stellar evolutionary aspects due to nuclear main-sequence evolution. DNA is taken as a proxy for carbon-based macromolecules following the paradigm that extraterrestrial biology may be most likely based on hydrocarbons. Consequently, the DNA action spectrum is utilized to represent the impact of the stellar ultraviolet (UV) radiation… 


One of the most fundamental topics of exobiology concerns the identification of stars with environments consistent with life. Although it is believed that most types of main-sequence stars might be


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

A Magnetic Snapshot Survey of F-Type Stars

We present a spectropolarimetric magnetic snapshot survey of 55 stars which includes 53 F-type stars ranging from spectral types F0 to F9 plus 2 chemically peculiar stars β CrB, and δ Cap. We look

MHD Study of Extreme Space Weather Conditions for Exoplanets With Earth‐Like Magnetospheres: On Habitability Conditions and Radio‐Emission

The present study aims at characterizing the habitability conditions of exoplanets with an Earth‐like magnetosphere inside the habitable zone of M and F stars, caused by the direct deposition of the

Formulation and resolutions of the red sky paradox

  • D. Kipping
  • Physics, Geology
    Proceedings of the National Academy of Sciences
  • 2021
A Bayesian probability function concerning the odds of finding oneself around an F/G/K-spectral type (Sun-like) star is formulated, which broadly inhibit the opportunities for complex life to develop around such stars: attenuated emergence rates, truncated evolutionary windows, and a paucity of suitable habitats.

Biofluorescent worlds: global biological fluorescence as a biosignature

In this paper, we analyze a new possible biological surface feature for habitable worlds orbiting other stars: biofluorescence. High ultraviolet (UV) and blue radiation fluxes drive the strongest

Searching for potentially habitable extra solar planets: a directed-study using real data from the NASA Kepler-Mission

What follows is a description of the procedure for a directed-study in which a student, guided by a faculty member, attempted to identify potentially habitable exoplanets using actual data available

Climatological and UV-based Habitability of Possible Exomoons in F-star Systems

We explore the astrobiological significance of F-type stars of spectral type between F5 V and F9.5 V, which possess Jupiter-type planets within or close to their climatological habitable zones. These



Habitability of super-Earth planets around main-sequence stars including red giant branch evolution: models based on the integrated system approach

Abstract In a previous study published in Astrobiology, we focused on the evolution of habitability of a 10 M⊕ super-Earth planet orbiting a star akin to the Sun. This study was based on a concept of

The evolution of habitable zones during stellar lifetimes and its implications on the search for extraterrestrial life

A stellar evolution computer model has been used to determine changes in the luminosity L and effective temperature Te of single stars during their time on the main sequence. The range of stellar

Habitable zones around main sequence stars.

The results suggest that mid-to-early K stars should be considered along with G stars as optimal candidates in the search for extraterrestrial life.

Carbon Biochemistry and the Ultraviolet Radiation Environments of F, G, and K Main Sequence Stars

Abstract The ultraviolet radiation environment of main sequence stars might be a factor in determining the suitability of extrasolar planets for biological evolution and the subsequent radiation of

Habitability of super-Earth planets around other suns: models including Red Giant Branch evolution.

A thermal evolution model for a 10 Earth-mass planet orbiting a star like the Sun, based on the integrated system approach, that identifies a so-called photosynthesis-sustaining habitable zone (pHZ), as determined by the limits of biological productivity on the planetary surface.

Habitable planets around the star Gliese 581

Radial velocity surveys are now able to detect terrestrial planets at habitable distance from M-type stars. Recently, two planets with minimum masses below 10 Earth masses were reported in a triple


▪ Abstract This review deals with the winds from “normal” hot stars such as O-stars, B- and A-supergiants, and Central Stars of Planetary Nebulae with O-type spectra. The advanced diagnostic methods

M stars as targets for terrestrial exoplanet searches and biosignature detection.

It is concluded that attempts at remote sensing of biosignatures and nonbiological markers from M star planets are important, not as tests of any quantitative theories or rational arguments, but instead because they offer an inspection of the residues from a Gyr-long biochemistry experiment in the presence of extreme environmental fluctuations.