Results 41 to 50 of about 42,004 (309)

Asteroseismology of 16,000 Kepler Red Giants: Global Oscillation Parameters, Masses, and Radii [PDF]

open access: yesAstrophysical Journal Supplement Series, 2018
The Kepler mission has provided exquisite data to perform an ensemble asteroseismic analysis on evolved stars. In this work we systematically characterize solar-like oscillations and granulation for 16,094 oscillating red giants, using end-of-mission ...
Jie Yu   +6 more
semanticscholar   +1 more source

A natureza matemática: da alma da Terra como potência geometrizante no opúsculo Da neve hexagonal de Johannes Kepler Mathematical nature: of the Earth's soul as a geometrising power in Johannes Kepler's opuscule Of hexagonal snow

open access: yesTrans/Form/Ação, 2008
Na física celeste apresentada em sua Astronomia nova, Kepler explica os movimentos planetários através da ação de uma certa força ou potência motriz solar.
Anastasia Guidi Itokazu
doaj   +1 more source

The California-Kepler Survey. I. High-resolution Spectroscopy of 1305 Stars Hosting Kepler Transiting Planets [PDF]

open access: yes, 2017
The California-Kepler Survey (CKS) is an observational program developed to improve our knowledge of the properties of stars found to host transiting planets by NASA’s Kepler Mission.
E. Petigura   +14 more
semanticscholar   +1 more source

Architectures of exoplanetary systems – I. A clustered forward model for exoplanetary systems around Kepler’s FGK stars [PDF]

open access: yesMonthly notices of the Royal Astronomical Society, 2019
Observations of exoplanetary systems provide clues about the intrinsic distribution of planetary systems, their architectures, and how they formed. We develop a forward modelling framework for generating populations of planetary systems and ‘observed ...
M. He, E. Ford, D. Ragozzine
semanticscholar   +1 more source

The California-Kepler Survey. IV. Metal-rich Stars Host a Greater Diversity of Planets [PDF]

open access: yes, 2017
Probing the connection between a star’s metallicity and the presence and properties of any associated planets offers an observational link between conditions during the epoch of planet formation and mature planetary systems. We explore this connection by
E. Petigura   +9 more
semanticscholar   +1 more source

The Flare Catalog and the Flare Activity in the Kepler Mission [PDF]

open access: yesAstrophysical Journal Supplement Series, 2019
We present a flare catalog of the Kepler mission using the long-cadence data of Data Release 25. This catalog comprises 3420 flare stars and 162,262 flare events.
Huiqin Yang, Jifeng Liu
semanticscholar   +1 more source

The California-Kepler Survey. V. Peas in a Pod: Planets in a Kepler Multi-planet System Are Similar in Size and Regularly Spaced [PDF]

open access: yes, 2017
We have established precise planet radii, semimajor axes, incident stellar fluxes, and stellar masses for 909 planets in 355 multi-planet systems discovered by Kepler.
L. Weiss   +12 more
semanticscholar   +1 more source

Evidence for a large exomoon orbiting Kepler-1625b [PDF]

open access: yesScience Advances, 2018
Hubble Space Telescope observations show a timing offset and an exomoon-like transit associated with a Jupiter-sized planet. Exomoons are the natural satellites of planets orbiting stars outside our solar system, of which there are currently no confirmed
A. Teachey, D. Kipping
semanticscholar   +1 more source

A novel hybrid algorithm of GSA with Kepler algorithm for numerical optimization

open access: yesJournal of King Saud University: Computer and Information Sciences, 2015
It is now well recognized that pure algorithms can be promisingly improved by hybridization with other techniques. One of the relatively new metaheuristic algorithms is Gravitational Search Algorithm (GSA) which is based on the Newton laws. In this paper,
Soroor Sarafrazi   +2 more
doaj   +1 more source

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