Dead zones of classical habitability in stellar binary systems

Moorman, S. Y.; Wang, Z.; Cuntz, M.

doi:10.1007/s10509-019-3714-x

Cited by 3 publications

(3 citation statements)

References 41 publications

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“…Many studies, in the last decade, have studied the HZ of the circumbinary systems (Haghighipour & Kaltenegger 2013;Cuntz 2014Cuntz , 2015Muller & Haghighipour 2014;Zuluaga et al 2016;Georgakarakos & Eggl 2019;Wang & Cuntz 2019;Cuntz & Wang 2020;Eggl et al 2020;Moorman et al 2020;Quarles et al 2020;Georgakarakos et al 2021). These studies, however, often rely on analytical estimates (Holman & Wiegert 1999) on whether the orbits of planets are stable and thus life would have time to emerge.…”

Section: Introductionmentioning

confidence: 99%

Analyzing the Habitable Zones of Circumbinary Planets Using Machine Learning

Kong

Jiang

Burn

et al. 2022

ApJ

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Exoplanet detection in the past decade by efforts including NASA’s Kepler and TESS missions has revealed many worlds that differ substantially from planets in our own solar system, including more than 150 exoplanets orbiting binary or multi-star systems. This not only broadens our understanding of the diversity of exoplanets, but also promotes our study of exoplanets in the complex binary systems and provides motivation to explore their habitability. In this study, we investigate the habitable zones of circumbinary planets (P-type) based on planetary trajectory and dynamically informed habitable zones. Our results indicate that the mass ratio and orbital eccentricity of binary stars are important factors affecting the orbital stability and habitability of planetary systems. Moreover, planetary trajectory and dynamically informed habitable zones divide planetary habitability into three categories: habitable, periodic habitable, and non-habitable. Therefore, we successfully train a machine-learning model to quickly and efficiently classify these planetary systems, which provides more useful constraints.

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Section: Introductionmentioning

confidence: 99%

Analyzing the Habitable Zones of Circumbinary Planets Using Machine Learning

Kong

Jiang

Burn

et al. 2022

ApJ

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“…A number of previous works have considered the climate and habitability of planets in circumbinary systems using the results from one-dimensional climate models. These have included both analytic calculations that weight the relative spectral contribution of two stars into the total irradiance received by planets (Haghighipour & Kaltenegger, 2013;Kane & Hinkel, 2012;Moorman et al, 2020;Wang & Cuntz, 2019a;Wang & Cuntz, 2019b), 1-D radiative-convective climate calculations that prognostically blend stellar spectra within their radiative transfer calculations (Cukier et al, 2019), and time-marching 1-D energy balance models that explicitly account for the time-dependent changes to the total incident stellar radiation (Forgan, 2014;Haqq-Misra et al, 2019;May & Rauscher, 2016). Additionally, two previous studies have explored the climate and atmospheres of planets in circumbinary systems using 3-D general circulation models (GCMs).…”

Section: Introductionmentioning

confidence: 99%

The Resilience of Habitable Climates Around Circumbinary Stars

Wolf

Haqq-Misra²,

Kopparapu

et al. 2020

Preprint

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Here we use a 3-D climate system model to study the habitability of Earth-like planets orbiting in circumbinary systems. In the most extreme cases, Earth-like planets in circumbinary systems could experience variations in the incident stellar flux of up to~50% on~100-day timescales. However, we find that Earth-like planets, having abundant surface liquid water, are generally effective at buffering against these time-dependent changes in the stellar irradiation due to the high thermal inertia of oceans compared with the relatively short periods of circumbinary-driven variations in the received stellar flux. Ocean surface temperatures exhibit little to no variation in time; however, land surfaces can experience modest changes in temperature, thus exhibiting an additional mode of climate variability driven by the circumbinary variations. Still, meaningful oscillations in surface temperatures are only found for circumbinary system architectures featuring the largest physically possible amplitudes in the stellar flux variation. In the most extreme cases, an Earth-like planet could experience circumbinary-driven variations in the global mean land surface temperature of up to~5 K, and variations of local daytime maximum temperatures of up to~12 K on seasonal timescales, while the global mean ocean temperatures vary by less than~2 K. Such seasonal temperature swings over land areas could potentially pose adaptability challenges for extant life. Still, habitable planets in circumbinary systems appear to be remarkably resilient against circumbinary-driven climate variations and can avoid any true climate catastrophes.Plain Language Summary A circumbinary system is one where a planet orbits around two stars simultaneously, resulting in large and rapid changes to both the stellar energy distribution and the total stellar energy received by the planet. Planets in circumbinary systems can experience significant variations in their received stellar energy over~10-to~100-day timescales. However, habitable planets in circumbinary systems are highly effective at buffering these changes in the received stellar energy due to the large thermal inertia of the oceans. Ocean surface temperatures exhibit little to no variation in time; however, land surfaces can experience modest changes in temperature. Even for the most extreme variations in stellar flux possible for circumbinary systems, Earth-like planets could avoid a permanent climate catastrophe, such as a runaway greenhouse or glaciation.

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“…A number of previous works have considered the climate and habitability of planets in circumbinary systems using the results from one‐dimensional climate models. These have included both analytic calculations that weight the relative spectral contribution of two stars into the total irradiance received by planets (Haghighipour & Kaltenegger, 2013; Kane & Hinkel, 2012; Moorman et al, 2020; Wang & Cuntz, 2019a; Wang & Cuntz, 2019b), 1‐D radiative‐convective climate calculations that prognostically blend stellar spectra within their radiative transfer calculations (Cukier et al, 2019), and time‐marching 1‐D energy balance models that explicitly account for the time‐dependent changes to the total incident stellar radiation (Forgan, 2014; Haqq‐Misra et al, 2019; May & Rauscher, 2016). Additionally, two previous studies have explored the climate and atmospheres of planets in circumbinary systems using 3‐D general circulation models (GCMs).…”

Section: Introductionmentioning

confidence: 99%

The Resilience of Habitable Climates Around Circumbinary Stars

et al. 2020

View full text Add to dashboard Cite

Here we use a 3‐D climate system model to study the habitability of Earth‐like planets orbiting in circumbinary systems. In the most extreme cases, Earth‐like planets in circumbinary systems could experience variations in the incident stellar flux of up to ~50% on ~100‐day timescales. However, we find that Earth‐like planets, having abundant surface liquid water, are generally effective at buffering against these time‐dependent changes in the stellar irradiation due to the high thermal inertia of oceans compared with the relatively short periods of circumbinary‐driven variations in the received stellar flux. Ocean surface temperatures exhibit little to no variation in time; however, land surfaces can experience modest changes in temperature, thus exhibiting an additional mode of climate variability driven by the circumbinary variations. Still, meaningful oscillations in surface temperatures are only found for circumbinary system architectures featuring the largest physically possible amplitudes in the stellar flux variation. In the most extreme cases, an Earth‐like planet could experience circumbinary‐driven variations in the global mean land surface temperature of up to ~5 K, and variations of local daytime maximum temperatures of up to ~12 K on seasonal timescales, while the global mean ocean temperatures vary by less than ~2 K. Such seasonal temperature swings over land areas could potentially pose adaptability challenges for extant life. Still, habitable planets in circumbinary systems appear to be remarkably resilient against circumbinary‐driven climate variations and can avoid any true climate catastrophes.

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Dead zones of classical habitability in stellar binary systems

Cited by 3 publications

References 41 publications

Analyzing the Habitable Zones of Circumbinary Planets Using Machine Learning

Analyzing the Habitable Zones of Circumbinary Planets Using Machine Learning

The Resilience of Habitable Climates Around Circumbinary Stars

The Resilience of Habitable Climates Around Circumbinary Stars

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