Dark Matter: Info and Math Equations

  • Context: Undergrad 
  • Thread starter Thread starter apope
  • Start date Start date
  • Tags Tags
    Dark matter Matter
Click For Summary

Discussion Overview

The discussion revolves around the topic of dark matter, specifically seeking mathematical equations and information related to its properties and implications in astrophysics. Participants explore equations relevant to dark matter's gravitational effects and its role in galaxy dynamics.

Discussion Character

  • Exploratory, Technical explanation, Homework-related

Main Points Raised

  • One participant seeks mathematical equations related to dark matter for a project, indicating a need for accessible information.
  • Another participant notes that dark matter is influenced by gravity, but its other properties remain largely unknown.
  • A suggestion is made to consider the derivation of the rotation curve for galaxies based on different density profiles, highlighting the importance of graphical representations for understanding the contributions of baryonic matter and dark matter.
  • It is proposed that using relatively simple mathematical concepts, such as those similar to Kepler's laws, one can estimate the amount of dark matter that could exist in the solar system without affecting planetary orbits, referencing the virial theorem and suggesting it is less than the mass of Jupiter.

Areas of Agreement / Disagreement

Participants present various approaches and ideas regarding the mathematical treatment of dark matter, but there is no consensus on specific equations or methods to be used.

Contextual Notes

The discussion does not resolve the complexities of dark matter's properties or the specific mathematical formulations that may apply. There are assumptions about the uniform distribution of dark matter and its gravitational effects that remain unexamined.

Who May Find This Useful

This discussion may be useful for students or individuals interested in astrophysics, particularly those exploring the mathematical aspects of dark matter and its implications in galaxy dynamics.

apope
Messages
14
Reaction score
0
I'm doing a project on dark matter and I've found some good information but I still haven't found any related mathematical equations.. are there any not to complicated ones i can relate to it??
 
Space news on Phys.org
What sort of equations are you looking for? Dark matter is subject to gravity, but nothing else is really known about it.
 
The most relevant equations would be the derivation of the rotation curve for a galaxy of a given density profile, but the graphical representation of these curves for Baryons only and Baryons + Dark Matter might be a more accessible and equally informative for you. There is a graph and some info on the http://en.wikipedia.org/wiki/Rotation_curves" site, but I'm sure a quick Google search would pull up a fair bit of info as well, once you read this and know what you are looking for.

Good luck with your project :smile:
 
Last edited by a moderator:
Using math not terribly more complex than Keplers laws you can calculate how much uniformly distributed, unseen [dark] matter can exist within the confines of our solar system without messing up planetary orbits [Hints: [1] virial theorem; [2] its less than the mass of Jupiter].
 

Similar threads

  • · Replies 6 ·
Replies
6
Views
3K
  • · Replies 3 ·
Replies
3
Views
3K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 12 ·
Replies
12
Views
2K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 31 ·
2
Replies
31
Views
4K
  • · Replies 10 ·
Replies
10
Views
2K
  • · Replies 9 ·
Replies
9
Views
2K
  • · Replies 8 ·
Replies
8
Views
2K