نتایج جستجو برای: mass center eccentricity
تعداد نتایج: 745981 فیلتر نتایج به سال:
Doppler planet searches have discovered that giant planets follow orbits with a wide range of orbital eccentricities, revolutionizing theories of planet formation. The discovery of hundreds of exoplanet candidates by NASA’s Kepler mission enables astronomers to characterize the eccentricity distribution of small exoplanets. Measuring the eccentricity of individual planets is only practical in f...
در این پایان نامه به بررسی ایدآل های اوّل و ابتدائی فازی و رادیکال های آنها می پردازیم. ابتدا به تعاریف اصلی و نتایج منطق فازی در فصل اوّل اشاره می کنیم و در فصل دوم به تعاریف و قضایای مربوط به مجموعه ها و ایدآل های فازی پرداخته، درنهایت در فصل سوم خصوصیات ایدآل های ابتدائی فازی ورادیکال آنها درحلقه های تعویض پذیرمورد بحث و بررسی قرارمی گیرد. ایدآل $a$ از $r$ ایدآل ابتدائی فازی است اگر برا...
We assess the multi-planet systems discovered by the Kepler satellite in terms of current ideas about orbital migration and eccentricity damping due to planetdisk interactions. Our primary focus is on first-order mean motion resonances, which we investigate analytically to lowest order in eccentricity. Only a few percent of planet pairs are in close proximity to a resonance. However, predicted ...
We consider the orbital evolution of satellites in galaxy mergers, focusing on eccentricity. Using a large suite N-body simulations, we study phenomenon satellite radialization -- profound increase eccentricity its orbit as it decays under dynamical friction. While is detected variety different setups, most efficient cases high mass, not very steep host density profiles, and initial To understa...
The Zagreb eccentricity indices are the eccentricity reformulation of the Zagreb indices. Let H be a simple graph. The first Zagreb eccentricity index (E1(H)) is defined to be the summation of squares of the eccentricity of vertices, i.e., E1(H) = ∑u∈V(H) Symmetry 2016, 9, 7; doi: 10.3390/sym9010007 www.mdpi.com/journal/symmetry Article First and Second Zagreb Eccentricity Indices of Thorny Gra...
We postulate that stars in the Galactic field are born in aggregates of binary stars with half mass radii R 0.5 and number of binaries N bin which are dynamically equivalent to the dominant mode cluster (N bin , R 0.5) ≈ (200, 0.8 pc). Binary orbits are distributed according to an initial period distribution which is consistent with pre-main sequence data. Stellar masses are paired at random fr...
Many studies provided evidence that the emotional content of visual stimulations modulates behavioral performance and neuronal activity. Surprisingly, these studies were carried out using stimulations presented in the center of the visual field while the majority of visual events firstly appear in the peripheral visual field. In this study, we assessed the impact of the emotional facial express...
Recent images of the disks of dust around the young stars HR 4796A (Jayawardhana each case, a double-lobed feature that may be asymmetric (one lobe may be brighter than the other). A symmetric double-lobed structure is that expected from a disk of dust with a central hole that is observed nearly edge-on (i.e., close to the plane of the disk). This paper shows how the gravitational influence of ...
We present two exoplanets detected at Keck Observatory. HD 179079 is a G5 subgiant that hosts a hot Neptune planet with M sin i = 27.5 M⊕ in a 14.48 d, low-eccentricity orbit. The stellar reflex velocity induced by this planet has a semiamplitude of K = 6.6 m s. HD 73534 is a G5 subgiant with a Jupiter-like planet of M sin i = 1.1 MJup and K = 16 m s −1 in a nearly circular 4.85 yr orbit. Both ...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید