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While solar power systems have offered a wide variety of electricity generation approaches including photovoltaics, solar thermal power systems, and solar thermoelectric generators, the ability of generating electricity at both the daytime…

Applied Physics · Physics 2020-07-29 Yanpei Tian , Xiaojie Liu , Fangqi Chen , Yi Zheng

Most stars are born in rich young stellar clusters (YSCs) embedded in giant molecular clouds. The most massive stars live out their short lives there, profoundly influencing their natal environments by ionizing HII regions, inflating…

The decimetric luminosity of many galaxies appears to be dominated by synchrotron emission excited by supernova explosions. Simple models suggest that the luminosity is directly proportional to the rate of supernova explosions of massive…

Astrophysics · Physics 2009-10-30 L. E. Cram

We explore the feasibility and potential characteristics of photosynthetic light-harvesting on exo-planets orbiting in the habitable zone of low mass stars ($< 1$ M$_{\odot}$). As stellar temperature, $T_{s}$, decreases, the irradiance…

Earth and Planetary Astrophysics · Physics 2023-09-25 Samir Chitnavis , Thomas J. Haworth , Edward Gillen , Conrad W. Mullineaux , Christopher D. P. Duffy

On planets near M dwarfs, photosynthesis (PS) will occur with an effectiveness which depends on the supply of visible photons with wavelengths between 400 and 700 nm. In this paper, we quantify the effectiveness of PS in two contexts which…

Solar and Stellar Astrophysics · Physics 2018-10-10 D. J. Mullan , H. P. Bais

The solar radiation spectrum is important for renewable energy harvesting, as well as climate and ecological systems analysis. In addition to seasonal/annual and diurnal oscillations, the signal is composed of different frequencies ($f$)…

Geophysics · Physics 2018-11-01 Golan Bel , Mahesh M. Bandi

We explore the biological damage initiated in the environments of F, G, K, and M-type main-sequence stars due to photospheric, chromospheric and flare radiation. The amount of chromospheric radiation is, in a statistical sense, directly…

Earth and Planetary Astrophysics · Physics 2015-05-14 M. Cuntz , E. F. Guinan , R. L. Kurucz

Observations of exoplanets and protoplanetary disks show that binary stellar systems can host planets in stable orbits. Given the high binary fraction among stars, the contribution of binary systems to Galactic habitability should be…

Earth and Planetary Astrophysics · Physics 2020-11-18 Paolo Simonetti , Giovanni Vladilo , Laura Silva , Alessandro Sozzetti

The Sun and $\alpha$ Cen A and B are the nearest stars to us. Despite the general agreement between their models and seismic and non-seismic constraints, there are serious problems pertaining to their interior. The good agreement between…

Solar and Stellar Astrophysics · Physics 2015-05-20 Mutlu Yildiz

Solar seismology has allowed precision measurements of both the static and dynamic structure of our local star, the Sun. In the near future, seismology of solar-like stars of different ages and masses, necessarily restricted by angular…

Astrophysics · Physics 2007-05-23 George R. Isaak , Kate G. Isaak

Cloud environment is thought to play a critical role in determining the mechanism of formation of massive stars. In this contribution we review the physical characteristics of the environment around recently formed massive stars. Particular…

Astrophysics · Physics 2009-10-31 Guido Garay , Susana Lizano

Magnetic storms on stars manifest as remarkable, randomly occurring changes of the luminosity over durations that are tiny in comparison to the normal evolution of stars. These stellar flares are bursts of electromagnetic radiation from…

Solar and Stellar Astrophysics · Physics 2024-02-13 Adam F. Kowalski

Aquatic photosynthesis plays a major role in carbon fixation and O$_2$ production on Earth. In this Letter, we analyze the prospects for oxygenic photosynthesis in aquatic environments on modern Earth-analogs around F-, G-, K- and M-type…

Earth and Planetary Astrophysics · Physics 2020-01-24 Manasvi Lingam , Abraham Loeb

The selective light absorption in space has been raised in astronomical literature. The substance producing the absorption must have some mass; thus the question is how large it is. We develop a dynamical model of the Milky Way system,…

Astrophysics of Galaxies · Physics 2022-03-29 E. Öpik

Cosmic rays are an important factor of space weather determining radiation conditions near the Earth and it seems to be essential to clarify radiation conditions near extrasolar planets too. Last year a terrestrial planet candidate was…

Solar and Stellar Astrophysics · Physics 2017-09-12 Alexei Struminsky , Andrei Sadovski , Anatoly Belov

A comparison between the observed O-type star and the WR star populations and the theoretically predicted ones depends on the effects of stellar wind mass loss during various phases and rotation on stellar evolution and, last not least, on…

Astrophysics · Physics 2007-05-23 D. Vanbeveren , E. De Donder

This paper presents a machine learning-based approach for predicting solar power generation with high accuracy using a 99% AUC (Area Under the Curve) metric. The approach includes data collection, pre-processing, feature selection, model…

Machine Learning · Computer Science 2023-03-15 E. Subramanian , M. Mithun Karthik , G Prem Krishna , D. Vaisnav Prasath , V. Sukesh Kumar

We present an approximate, analytical formulae for the computation of hadronically-produced gamma-ray luminosity in the innermost regions of stellar winds. We put this into the context of other recent research on regions of star formation…

Astrophysics · Physics 2007-05-23 Diego F. Torres

The richness and very high accuracy of the observed frequencies of solar oscillations provide tight constraints on the structure of the solar interior and hence on the assumptions underlying the calculation of solar models. This permits the…

Astrophysics · Physics 2007-05-23 J. Christensen-Dalsgaard

Solar energy is rapidly becoming a robust renewable energy source to conventional finite resources such as fossil fuels. It is harvested using interconnected photovoltaic panels, typically built with crystalline silicon cells, i.e.…

Computer Vision and Pattern Recognition · Computer Science 2024-03-12 Booy Vitas Faassen , Jorge Serrano , Paul D. Rosero-Montalvo
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