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Solar Elemental Abundances [PDF]

open access: yesOxford Research Encyclopedia of Planetary Science, 2019
Solar elemental abundances, or solar system elemental abundances, refer to the complement of chemical elements in the entire Solar System. The Sun contains more than 99% of the mass in the solar system and therefore the composition of the Sun is a good ...
K. Lodders
semanticscholar   +4 more sources

MODELING MICROBIAL ABUNDANCES AND DYSBIOSIS WITH BETA-BINOMIAL REGRESSION. [PDF]

open access: yesAnnals of Applied Statistics, 2019
Using a sample from a population to estimate the proportion of the population with a certain category label is a broadly important problem. In the context of microbiome studies, this problem arises when researchers wish to use a sample from a population ...
Bryan D. Martin, D. Witten, A. Willis
semanticscholar   +1 more source

Mass–Metallicity Trends in Transiting Exoplanets from Atmospheric Abundances of H2O, Na, and K [PDF]

open access: yesAstrophysical Journal, 2019
Atmospheric compositions can provide powerful diagnostics of formation and migration histories of planetary systems. We investigate constraints on atmospheric abundances of H2O, Na, and K, in a sample of transiting exoplanets using the latest ...
L. Welbanks   +5 more
semanticscholar   +1 more source

Meta-analysis reveals declines in terrestrial but increases in freshwater insect abundances

open access: yesScience, 2020
Local drivers of decline matter Recent studies have reported alarming declines in insect populations, but questions persist about the breadth and pattern of such declines. van Klink et al.
Roel van Klink   +5 more
semanticscholar   +1 more source

Elemental and molecular abundances in comet 67P/Churyumov-Gerasimenko [PDF]

open access: yesMonthly notices of the Royal Astronomical Society, 2019
Comets are considered to be some of the most pristine and unprocessed Solar system objects accessible to in situ exploration. Investigating their molecular and elemental composition takes us on a journey back to the early period of our Solar system and
M. Rubin   +20 more
semanticscholar   +1 more source

Retrieving Temperatures and Abundances of Exoplanet Atmospheres with High-resolution Cross-correlation Spectroscopy [PDF]

open access: yesAstronomical Journal, 2018
High-resolution spectroscopy (R ≥ 25,000) has recently emerged as one of the leading methods for detecting atomic and molecular species in the atmospheres of exoplanets.
M. Brogi, M. Line
semanticscholar   +1 more source

H2O abundances and cloud properties in ten hot giant exoplanets [PDF]

open access: yesMonthly notices of the Royal Astronomical Society, 2018
Transmission spectroscopy of exoplanets has the potential to provide precise measurements of atmospheric chemical abundances, in particular of hot Jupiters whose large sizes and high temperatures make them conducive to such observations. To date, several
Arazi Pinhas   +3 more
semanticscholar   +1 more source

Deep learning of multi-element abundances from high-resolution spectroscopic data [PDF]

open access: yesMonthly notices of the Royal Astronomical Society, 2018
Deep learning with artificial neural networks is increasingly gaining attention, because of its potential for data-driven astronomy. However, this methodology usually does not provide uncertainties and does not deal with incompleteness and noise in the ...
Henry W. Leung, J. Bovy
semanticscholar   +1 more source

Accuracy and Precision of Industrial Stellar Abundances [PDF]

open access: yesAnnual Review of Astronomy and Astrophysics, 2018
There has been an incredibly large investment in obtaining high-resolution stellar spectra for determining chemical abundances of stars. This information is crucial to answer fundamental questions in astronomy by constraining the formation and evolution ...
P. Jofr'e, U. Heiter, C. Soubiran
semanticscholar   +1 more source

Fecal pollution can explain antibiotic resistance gene abundances in anthropogenically impacted environments

open access: yesNature Communications, 2019
Discharge of treated sewage leads to release of antibiotic resistant bacteria, resistance genes and antibiotic residues to the environment. However, it is unclear whether increased abundance of antibiotic resistance genes in sewage and sewage-impacted ...
Antti Karkman   +3 more
semanticscholar   +1 more source

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