The effect of a strong stellar flare on the atmospheric chemistry of an earth-like planet orbiting an M dwarf.

@article{Segura2010TheEO,
  title={The effect of a strong stellar flare on the atmospheric chemistry of an earth-like planet orbiting an M dwarf.},
  author={Ant'igona Segura and Lucianne M. Walkowicz and Victoria S. Meadows and James F Kasting and Suzanne Hawley},
  journal={Astrobiology},
  year={2010},
  volume={10 7},
  pages={
          751-71
        }
}
Main sequence M stars pose an interesting problem for astrobiology: their abundance in our galaxy makes them likely targets in the hunt for habitable planets, but their strong chromospheric activity produces high-energy radiation and charged particles that may be detrimental to life. We studied the impact of the 1985 April 12 flare from the M dwarf AD Leonis (AD Leo), simulating the effects from both UV radiation and protons on the atmospheric chemistry of a hypothetical, Earth-like planet… Expand

Paper Mentions

Modeling Repeated M Dwarf Flaring at an Earth-like Planet in the Habitable Zone: Atmospheric Effects for an Unmagnetized Planet
TLDR
The results suggest that active M dwarf hosts may comprehensively destroy ozone shields and subject the surface of magnetically unprotected Earth-like planets to long-term radiation that can damage complex organic structures. Expand
Atmospheric effects of stellar cosmic rays on Earth-like exoplanets orbiting M-dwarfs
M-dwarf stars are generally considered favourable for rocky planet detection. However, such planets may be subject to extreme conditions due to possible high stellar activity. The goal of this workExpand
Impact of Stellar Superflares on Planetary Habitability
High-energy radiation caused by exoplanetary space weather events from planet-hosting stars can play a crucial role in conditions promoting or destroying habitability in addition to the conventionalExpand
Effect of stellar flares on the upper atmospheres of HD 189733b and HD 209458b
Stellar flares are a frequent occurrence on young low-mass stars around which many detected exoplanets orbit. Flares are energetic, impulsive events, and their impact on exoplanetary atmospheresExpand
Stellar Proton Event-induced surface radiation dose as a constraint on the habitability of terrestrial exoplanets
  • D. Atri
  • Physics
  • Monthly Notices of the Royal Astronomical Society: Letters
  • 2019
The discovery of terrestrial exoplanets orbiting in habitable zones around nearby stars has been one of the significant developments in modern astronomy. More than a dozen such planets, likeExpand
The Earth-like Galactic cosmic ray intensity in the habitable zone of the M dwarf GJ 436
Galactic cosmic rays are energetic particles important in the context of life. Many works have investigated the propagation of Galactic cosmic rays through the Sun’s heliosphere. However, the cosmicExpand
The biological impact of superflares on planets in the Habitable Zone
Abstract Younger and fully convective stars are much more active than our Sun, producing many superflares. Here we estimate the impact of the superflares UV radiation on living organisms on theExpand
Sensitivity of biosignatures on Earth-like planets orbiting in the habitable zone of cool M-dwarf Stars to varying stellar UV radiation and surface biomass emissions
Abstract We find that variations in the UV emissions of cool M-dwarf stars have a potentially large impact upon atmospheric biosignatures in simulations of Earth-like exoplanets i.e. planets withExpand
Stellar Activity and CMEs: Important Factors of Planetary Evolution
CME activity of the Sun is known to be an important impacting factor for the magnetospheres, atmospheres, and surfaces of solar system planets. Following an idea of a solar-stellar analogy, CMEExpand
Persistence of flare-driven atmospheric chemistry on rocky habitable zone worlds
Low-mass stars show evidence of vigorous magnetic activity in the form of large flares and coronal mass ejections. Such space weather events may have important ramifications for the habitability andExpand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 62 REFERENCES
Biosignatures from Earth-like planets around M dwarfs.
TLDR
Coupled one-dimensional photochemical-climate calculations have been performed for hypothetical Earth-like planets around M dwarfs to determine which biosignature gases might be observed by a future, space-based telescope. Expand
Simulations of the Atmospheres of Synchronously Rotating Terrestrial Planets Orbiting M Dwarfs: Conditions for Atmospheric Collapse and the Implications for Habitability☆
Abstract Planets within the habitable zones of M dwarfs are likely to be synchronous rotators; in other words, one side is permanently illuminated while the other side is in perpetual darkness. WeExpand
A reappraisal of the habitability of planets around M dwarf stars.
TLDR
It is concluded that M dwarf stars may indeed be viable hosts for planets on which the origin and evolution of life can occur and it makes sense to include M dwarfs in programs that seek to find habitable worlds and evidence of life. Expand
Coronal mass ejection (CME) activity of low mass M stars as an important factor for the habitability of terrestrial exoplanets. II. CME-induced ion pick up of Earth-like exoplanets in close-in habitable zones.
TLDR
It is suggested that larger and more massive terrestrial-type exoplanets may better protect their atmospheres against CMEs, because the larger cores of such exoplanet would generate stronger magnetic moments and their higher gravitational acceleration would constrain the expansion of their thermosphere-exosphere regions and reduce atmospheric escape. Expand
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 tripleExpand
Habitable zones around main sequence stars.
TLDR
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. Expand
Transport of Ionizing Radiation in Terrestrial-like Exoplanet Atmospheres
TLDR
It is suggested that transient atmospheric ionization layers can be frequently created at altitudes lower than the equilibrium layers that result from steady irradiation and winds from the parent star, as well as the effects of angle of incidence and a modified twostream approximation solution for the UV transfer. Expand
Tides and the evolution of planetary habitability.
TLDR
The tidal evolution of hypothetical terrestrial planets around low-mass stars is calculated and it is shown that tides can evolve planets past the inner edge of the habitable zone, sometimes in less than 1 billion years. Expand
Climate model studies of synchronously rotating planets.
  • M. Joshi
  • Geology, Medicine
  • Astrobiology
  • 2003
TLDR
It is reinforced that synchronously rotating planets within the circumstellar habitable zones of M dwarf stars should be habitable, and therefore M dwarf systems should not be excluded in future searches for exoplanets. Expand
UV habitable zones around M stars
Abstract During the last decade there was a change in paradigm, which led to consider that terrestrial-type planets within liquid-water habitable zones (LW-HZ) around M stars can also be suitableExpand
...
1
2
3
4
5
...