نتایج جستجو برای: eccentric orbits

تعداد نتایج: 24838  

2005
Ji-Lin Zhou

To date, more than 130 extrasolar planets around main sequence stars are revealed mainly by the Doppler radial velocity measurements. Due to the observational biases, most of the detected planets are moving in orbits close to the host stars, with some in highly eccentric orbits. Dynamical processes during the late stage of planet formation are important to account for the present orbital proper...

Journal: :Monthly Notices of the Royal Astronomical Society 2021

With n-body simulations, we model terrestrial circumbinary planet (CBP) formation with an initial surface density profile motivated by hydrodynamic gas disc simulations. The binary plays important role in shaping the distribution of bodies. After has dissipated, torque from speeds up process promoting body-body interactions but also drives ejection building material system at early time. Fewer ...

2008
Scott Tremaine Jihad Touma

The orbital dynamics of most planetary satellites is governed by the quadrupole moment from the equatorial bulge of the host planet and the tidal field from the Sun. On the Laplace surface, the long-term orbital evolution driven by the combined effects of these forces is zero, so that orbits have a fixed orientation and shape. The “classical” Laplace surface is defined for circular orbits, and ...

2001
V. B. Ignatiev A. G. Kuranov K. A. Postnov M. E. Prokhorov

Unresolved coalescing binary neutron stars in the Galaxy and beyond produce a stochastic gravitational wave background within the LISA frequency band, which can be potentially dangerous for possible detection of fundamentally more interesting relic cosmological backgrounds. Here we address the question what effects the unavoidable eccentricity of orbits of these systems should have on the prope...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2016
Ji-Wei Xie Subo Dong Zhaohuan Zhu Daniel Huber Zheng Zheng Peter De Cat Jianning Fu Hui-Gen Liu Ali Luo Yue Wu Haotong Zhang Hui Zhang Ji-Lin Zhou Zihuang Cao Yonghui Hou Yuefei Wang Yong Zhang

The nearly circular (mean eccentricity [Formula: see text]) and coplanar (mean mutual inclination [Formula: see text]) orbits of the solar system planets motivated Kant and Laplace to hypothesize that planets are formed in disks, which has developed into the widely accepted theory of planet formation. The first several hundred extrasolar planets (mostly Jovian) discovered using the radial veloc...

1999
David Schade

We present an analysis of the orbital properties in 9 intermediate-redshifts cluster of the CNOC1 survey and we compare them to a control sample of 12 nearby clusters. Similar to the nearby elliptical galaxies, the bulge-dominated galaxies in clusters at redshifts ∼ 0.1 − 0.4 present orbits that are more eccentric than those for disk-dominated galaxies. However, the orbital segregation is less ...

Journal: :Monthly Notices of the Royal Astronomical Society 2019

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