Results 31 to 40 of about 22,488,979 (349)

How to design a planetary system for different scattering outcomes: giant impact sweet spot, maximising exocomets, scattered disks [PDF]

open access: yes, 2016
This paper considers the dynamics of scattering of planetesimals or planetary embryos by a planet on a circumstellar orbit. We classify six regions in the planet's mass versus semimajor axis parameter space according to the dominant outcome for scattered
M. Wyatt   +4 more
semanticscholar   +1 more source

The record‐breaking heat wave of June 2019 in Central Europe

open access: yesAtmospheric Science Letters, 2020
After being hit by several devastating heat waves in recent years, Europe experienced an exceptionally hot June in 2019 again. This June is the hottest one on record over Central Europe both in a monthly‐mean sense and in terms of the number of extremely
Peiqiang Xu   +4 more
doaj   +1 more source

Implications for Planetary System Formation from Interstellar Object 1I/2017 U1 (‘Oumuamua) [PDF]

open access: yes, 2017
The recently discovered minor body 1I/2017 U1 (‘Oumuamua) is the first known object in our solar system that is not bound by the Sun’s gravity. Its hyperbolic orbit (eccentricity greater than unity) strongly suggests that it originated outside our solar ...
D. Trilling   +8 more
semanticscholar   +1 more source

An optical transmission spectrum of the transiting hot Jupiter in the metal-poor WASP-98 planetary system [PDF]

open access: yes, 2016
The WASP-98 planetary system represents a rare case of a hot Jupiter hosted by a metalpoor main-sequence star.
L. Mancini   +8 more
semanticscholar   +1 more source

The Laplace resonance in the Kepler-60 planetary system [PDF]

open access: yes, 2015
We investigate the dynamical stability of the Kepler-60 planetary system with three super-Earths. We first determine their orbital elements and masses by Transit Timing Variation (TTV) data spanning quarters Q1-Q16 of the KEPLER mission.
K. Goździewski   +3 more
semanticscholar   +1 more source

Contrast analysis between the trajectory of the planetary system and the periodicity of solar activity [PDF]

open access: yesAnnales Geophysicae, 2017
The relationship between the periodic movement of the planetary system and its influence on solar activity is currently a serious topic in research. The kinematic index of the planet juncture index has been developed to find the track and variation of
W. Sun   +9 more
doaj   +1 more source

Stability and Formation of the Resonant System HD 73526 [PDF]

open access: yes, 2007
Based on radial velocity measurements it has been found recently that the two giant planets detected around the star HD 73526 are in 2:1 resonance. However, as our numerical integration shows, the derived orbital data for this system result in chaotic ...
Beaugé   +26 more
core   +2 more sources

Research on the Coupled Phase-Tuning Vibration Characteristics of a Two-Stage Planetary Transmission System

open access: yesMachines, 2023
Mesh phasing has a dramatic impact on the static and dynamic behaviours of planetary gear systems. This research investigates the coupled phase-tuning mechanism of two-stage planetary gear systems and the corresponding relationship with the coupled ...
Pengfei Yan   +4 more
doaj   +1 more source

Outside the Safe Operating Space of the Planetary Boundary for Novel Entities

open access: yesEnvironmental Science and Technology, 2022
We submit that the safe operating space of the planetary boundary of novel entities is exceeded since annual production and releases are increasing at a pace that outstrips the global capacity for assessment and monitoring. The novel entities boundary in
L. Persson   +13 more
semanticscholar   +1 more source

The fragility of planetary systems [PDF]

open access: yes, 2015
We specify the range to which perturbations penetrate a planetesimal system. Such perturbations can originate from massive planets or from encounters with other stars.
Jilkova, Lucie, Zwart, Simon Portegies
core   +3 more sources

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