Inhomogeneous Models of Jupiter and Saturn

2015 ◽  
Vol 55 (2-3) ◽  
pp. 116-122 ◽  
Author(s):  
N. Nettelmann
Keyword(s):  
Inhomogeneous Models

scholarly journals EXACT INHOMOGENEOUS MODELS AND THE DRIFT OF LIGHT RAYS INDUCED BY NONSYMMETRIC FLOW OF THE COSMIC MEDIUM

2013 ◽  
Vol 22 (06) ◽  
pp. 1330013 ◽  
Author(s):  
ANDRZEJ KRASIŃSKI ◽  
KRZYSZTOF BOLEJKO
Keyword(s):  
Time Dependence ◽  
Real Time ◽  
Null Geodesic ◽  
Cosmological Models ◽  
Zero Drift ◽  
Inhomogeneous Models ◽  
Cosmic Medium ◽  
Light Rays ◽  
Under Construction ◽  
The Universe

After introducing the Szekeres and Lemaître–Tolman cosmological models, the real-time cosmology program is briefly mentioned. Then, a few widespread misconceptions about the cosmological models are pointed out and corrected. Investigation of null geodesic equations in the Szekeres models shows that observers in favorable positions would see galaxies drift across the sky at a rate of up to 10-6 arc s per year. Such a drift would be possible to measure using devices that are under construction; the required time of monitoring would be ≈10 years. This effect is zero in the FLRW models, so it provides a measure of inhomogeneity of the Universe. In the Szekeres models, the condition for zero drift is zero shear. But in the shearfree normal models, the condition for zero drift is that, in the comoving coordinates, the time dependence of the metric completely factors out.

scholarly journals Analysis of Spectroscopic Observations of Jupiter and the Variability of the Structure of the Visible Clouds

1974 ◽  
Vol 65 ◽  
pp. 385-387
Author(s):  
G. E. Hunt ◽  
J. T. Bergstralh
Keyword(s):  
Lower Atmosphere ◽  
Cloud Structure ◽  
Spectroscopic Observations ◽  
Inhomogeneous Models ◽  
Time Variations

Realistic inhomogeneous models of Jupiter's lower atmosphere are used to interpret recent observations of the (3–0) and (4–0) H2 quadrupole lines at different portions of the visible disc of the planet. The time variations of these observations are analysed in terms of changes in the cloud structure.

Inhomogeneous models of Titan's aerosol distribution

Icarus ◽  
1984 ◽  
Vol 57 (1) ◽  
pp. 72-82 ◽  
Author(s):  
M. Podolak ◽  
A. Bar-Nun ◽  
N. Noy ◽  
L.P. Giver
Keyword(s):  
Inhomogeneous Models ◽  
Aerosol Distribution

scholarly journals PHASE TRANSITIONS IN SOME EPIDEMIC MODELS DEFINED ON SMALL-WORLD NETWORKS

2003 ◽  
Vol 14 (06) ◽  
pp. 825-833 ◽  
Author(s):  
H. N. AGIZA ◽  
A. S. ELGAZZAR ◽  
S. A. YOUSSEF
Keyword(s):  
Phase Transitions ◽  
Small World ◽  
Epidemic Models ◽  
Small World Networks ◽  
Inhomogeneous Models ◽  
Sirs Model ◽  
Variable Susceptibility

Some modified versions of susceptible-infected-recovered-susceptible (SIRS) model are defined on small-world networks. Latency, incubation and variable susceptibility are separately included. Phase transitions in these models are studied. Then inhomogeneous models are introduced. In some cases, the application of the models to small-world networks is shown to increase the epidemic region.

scholarly journals Singularity-free inhomogeneous models with heat flow

1993 ◽  
Vol 10 (7) ◽  
pp. L85-L88 ◽  
Author(s):  
L K Patel ◽  
N Dadhich
Keyword(s):  
Heat Flow ◽  
Inhomogeneous Models

Magnetotelluric response on vertically inhomogeneous earth having conductivity varying exponentially with depth

Geophysics ◽  
1982 ◽  
Vol 47 (1) ◽  
pp. 89-99 ◽  
Author(s):  
D. Kao
Keyword(s):  
Half Space ◽  
Apparent Resistivity ◽  
Bessel Functions ◽  
Homogeneous Layer ◽  
Modified Bessel Functions ◽  
Layer Model ◽  
Transitional Layer ◽  
Number Of Layers ◽  
Inhomogeneous Models ◽  
Electric And Magnetic Fields

Magnetotelluric (MT) response is studied for a vertically inhomogeneous earth, where conductivity (or resistivity) varies exponentially with depth as [Formula: see text]. Horizontal electric and magnetic fields in such an inhomogeneous medium are given in terms of modified Bessel functions. Impedance and apparent resistivity are calculated for (1) an inhomogeneous half‐space having conductivity varying exponentially with depth, (2) an inhomogeneous half‐space overlain by a homogeneous layer, and (3) a three‐layer model with the second layer as an inhomogeneous or transitional layer. Results are presented graphically and are compared with those of homogeneous multilayer models. In the case of resistivity increasing exponentially with depth, the results of the above inhomogeneous models are equivalent to those of Cagniard two‐layer models, with [Formula: see text]. In the case of resistivity decreasing exponentially with depth, the homogeneous multilayer approximation depends upon the number of layers and the layer parameters chosen; |Z/ωμ| as a function of frequency is more useful than the apparent resistivity in determining the values of p and [Formula: see text].

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