The (In)stability of Planetary Systems [PDF]
The Astrophysical Journal, 2004 37 pages, 49 figures, 13 tables, submitted to ...
Rory Barnes, Thomas R. Quinn
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A Review of Possible Planetary Atmospheres in the TRAPPIST-1 System [PDF]
Space Science Reviews, 2020 TRAPPIST-1 is a fantastic nearby (∼39.14 light years) planetary system made of at least seven transiting terrestrial-size, terrestrial-mass planets all receiving a moderate amount of irradiation.
M. Turbet +6 more
semanticscholar +1 more source
On Populism, Planets, and Why Concepts Should Precede Definitions and Theory-Seeking
Sociologica, 2019 Despite its remarkable growth in recent years, the study of populism has long suffered from the lack of a comprehensive theory about its causes, development, and outcomes.
Takis S. Pappas
doaj +1 more source
Stellar Spin–Orbit Alignment for Kepler-9, a Multi-transiting Planetary System with Two Outer Planets Near 2:1 Resonance [PDF]
, 2017 We present spectroscopic measurements of the Rossiter–McLaughlin effect for the planet b of the Kepler-9 multi-transiting planetary system. The resulting sky-projected spin–orbit angle is λ = −13° ± 16°, which favors an aligned system and strongly ...
Songhu Wang +6 more
semanticscholar +1 more source
A new paradigm of governance for a carbon-pricing system [PDF]
, 2016 Throughout its life, the United Nations has played a pioneering role in the world of ideas. COP21 – also known as Paris 2015 – shows the path for the United Nations to establish a new governance that will enforce the compliance of a new planetary carbon ...
Berezin, A. +2 more
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Precise masses for the transiting planetary system HD 106315 with HARPS [PDF]
, 2017 The multi-planetary system HD 106315 was recently found in K2 data . The planets have periods of $P_b \sim9.55$ and $P_c \sim 21.06\,$days, and radii of $ r_b = 2.44 \pm 0.17\, $ and $r_c = 4.35 \pm 0.23\, $ $R_{\oplus}$. The brightness of the host star (
S. Barros +47 more
semanticscholar +1 more source
How to design a planetary system for different scattering outcomes: giant impact sweet spot, maximising exocomets, scattered disks [PDF]
, 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
Implications for Planetary System Formation from Interstellar Object 1I/2017 U1 (‘Oumuamua) [PDF]
, 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
International Astronomical Union Colloquium, 1999 AbstractThe past decade brought direct evidence of the previously surmised exoplanetary systems. A variety of planetary system types exist those around pulsars, around both young and old main-sequence stars (as evidenced by planetesimal disks of the Beta Pictoris-type), and the mature giant exoplanets found in radial velocity surveys.
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Long-term stability of the HR 8799 planetary system without resonant lock [PDF]
, 2016 HR 8799 is a star accompanied by four massive planets on wide orbits. The observed planetary configuration has been shown to be unstable on a timescale much shorter than the estimated age of the system (~ 30 Myr) unless the planets are locked into mean ...
Y. Gotberg +4 more
semanticscholar +1 more source