# Questions tagged [modeling]

Questions which are asking about the mathematical formulations whose theoretical and numerical analysis provides insight, answers, and guidance useful for the originating application.

65 questions
Filter by
Sorted by
Tagged with
1 vote
43 views

### Mathematical modeling of the influence of components of the interstellar medium on the distortion of the wavefront of the observed object

Associated with: Flowchart of the pipeline of key processes for modeling wavefront distortion of astronomical objects: ground-based observation case Let's imagine for a moment that we are outside the ...
• 825
1 vote
34 views

### Flowchart of the pipeline of key processes for modeling wavefront distortion of astronomical objects: ground-based observation case

Associated with: Mathematical modeling of the influence of components of the interstellar medium on the distortion of the wavefront of the observed object Being inspired by this article, as well as ...
• 825
80 views

### How to flatten 3d astronomical coordinates into 2d polar form in Python

I first asked this at Stack Overflow but got redirected here I am making a 2d simulation of the solar system. For that you need a starting point for all planets. Right now I am storing that data in ...
• 45
73 views

### How to convert flux to flux density for a synthetic spectrum?

I have several model SEDs generated by the CLOUDY spectral synthesis code. The data is formatted with one wavelength column and one flux column. I wish to perform Hubble synthetic photometry on these ...
112 views

### How do various astrophysical models deal with so many orders of magnitude in scale? Are there completely different models for different scales?

If we just model our solar system's dynamics, one could use a straightforward numerical integrator with all n(n-1)/2 gravitational interactions along with some torques and non-gravitational forces. ...
• 30.7k
44 views

### Which static spherically symmetric perfect fluid solutions of Einstein field equations are known to be suitable for stellar models?

Wikipedia's (Static spherically symmetric perfect fluid) short list ends in 2005 and lists only in total 5 such solutions. Does somebody know more?
• 129
907 views

### analemma for a specified lat/long at a specific time of day?

I have in mind to do a yearlong photo project of the solar analemma. Can someone suggest a software program that will provide (& chart) the altitude and azimuth of the sun, for a given location, ...
89 views

### Find position of orbiting body along orbit efficiently

I'm coding a game, and a fundamental mechanic is celestial bodies moving in elliptical, Keplerian orbits around a single gravitational point in a planetary system (not our solar system). The bodies ...
• 51
98 views

### Difficulty simulating trajectory of moon and sun for Apollo 11 mission

As an engineering student, I am doing a project about Kalman filtering and the mission Apollo 11. Now I tried to simulate the trajectory of the moon and sun for 3 days (the duration in which the ...
• 55
101 views

### Conversion of 1D plot in 3D plot gives different physics

I am to track the path of a particle due to Lorentz force of the planet magnetic field, assuming there is no gravitational force on it. The equation of motion due to Lorentz force in rotating ...
395 views

### Numerical Programming using ODEINT takes more than 17 minutes

I am trying to track the trajectories of a charged particles under the influence of Gravitational and Electromagnetic effect. Computing for time points, t0=0second -tf= (36002430)sec with stepsize 0....
48 views

### Galaxy shape and time differentials

Can it really be said that something as large as a galaxy can have a "shape", which the positions of its constituent stars are their positions at various times in the past? A star 100K ly ...
203 views

### Different techniques for calculation of celestial bodies dynamics with different time-scales

Differential equations describing the dynamics of celestial bodies (rotation, nutation, precession and other effects) can be solved numerically, which makes it possible to study their general non-...
• 825
1 vote
44 views

### Best resource for exoplanet statistics?

While the number of detected exoplanets is still low, is there a model that, considering the number and duration of made observations, and the fact that (non)detections depend on orbital plane ...
• 1,890
476 views

• 5,626
158 views

### Time evolution data of the Great Red Spot on Jupiter?

Jupiter's Great Red Spot fascinates scientists for ages, so it does me. Where can I find a table (e.g. as CSV-file) with the time evolution of longitude, latitude, horizontal and vertical extension of ...
• 5,626
167 views

### Modeling egg shaped stars

I am well aware of one-dimensional stellar models: The simplest commonly used model of stellar structure is the spherically symmetric quasi-static model, which assumes that a star is in a steady ...
• 5,626
371 views

### DAMIT how do they get 3D shape and rotational trajectory of a tumbling asteroid from photometry?

This question asks about an algorithm used in Project DAMIT. @RobJeffries' answer led me to Wikipedia's William Herschel Telescope which led me to Wikipedia's 2008 TC3 which led me to the animation ...
• 30.7k
54 views

### Does a replacement exist for Dexter? (A tool that reconstructs data from a pdf of a graph)

Dexter was a tool from the German Astrophysical Virtual Observatory, made by the Center for Astronomy of Heidelberg University (ZAH). It was able to reconstruct data from a graph if you provided a pdf ...
• 31
1 vote
40 views

### Details of the M87 Active Galactic Nucleus -- questions of scale

This video describes a scale model of the M87 SMBH (somewhat distorted to live in flat space and for other practical reasons) in which the Schwarzschild radius appears to be scaled to about 10cm, with ...
• 10.3k
97 views

### Angles in Ptolemaic Model

I am about to work with Ptolemy's Model for the motion of an upper Planet (Mars). I use a epicycle rolling on the deferent. As a first step, I am just interested in the shape of the trajectory, which ...
• 73
1 vote
367 views

### How can I get/generate/extract PSF image from galaxy .fits image?

I want to model an image of a galaxy from Hubble. For this, I need the PSF image as well. I already tried to use TinyTim, but I don't have half of the parameters and cant be sure about the quality of ...
1 vote
36 views

### Model/Infographic of plane of orbits and rotations planes of solar bodies (including their moons)

Is there a model/infographic with emphasis on the orbit and rotation plane of solar bodies? Of course, no scaling is needed for the size or distance. I remember reading there is one planet where the ...
• 119