Need data for galactic rotation curves

In summary, the person is looking for sources of data for galactic rotation curves, including both observed and expected velocities, to experiment with in a spreadsheet. They have had difficulty finding data for expected velocities and are seeking help or guidance in finding this information.
  • #1
Buckethead
Gold Member
560
38
I'm looking for sources of data for galactic rotation curves but need not only the observed rotation curves but also the expected (Keplerian) curve data to load into a spreadsheet to experiment with. After extensive searching I found a few pockets of data for observed velocities but not for expected velocities. I tried going through the NED website but the format is over my head. (I'm just a hobbyist not a researcher). So if anyone can point me to a site that shows raw data for 1) radius, 2) observed velocity, 3) expected velocity for some popular local spiral galaxies it would be very much appreciated.
 
Astronomy news on Phys.org
  • #2
Can anyone help with this or guide me toward finding someone that can help with this? Thanks!
 

FAQ: Need data for galactic rotation curves

Why do we need data for galactic rotation curves?

Data for galactic rotation curves is important for understanding the dynamics of galaxies. This data helps us to determine the distribution of mass within a galaxy and to study the effects of dark matter on galactic rotation. It also allows us to test and refine existing theories of gravity and cosmology.

How is data for galactic rotation curves obtained?

Data for galactic rotation curves can be obtained through various methods, such as optical telescopes, radio telescopes, and spectroscopy. These techniques allow us to measure the velocities of stars and gas within a galaxy, which are used to plot the rotation curve.

What is a rotation curve?

A rotation curve is a graph that plots the rotational velocity of a galaxy as a function of its distance from the center. This curve can provide valuable information about the distribution of mass within a galaxy and the presence of dark matter.

Why is dark matter important in studying galactic rotation curves?

Dark matter is important in studying galactic rotation curves because it is believed to make up a large portion of a galaxy's mass. By studying its effects on the rotation curve, we can learn more about the properties and distribution of dark matter in the universe.

How does data for galactic rotation curves support the theory of dark matter?

Data for galactic rotation curves supports the theory of dark matter by showing that the observed rotational velocities of galaxies do not match the predicted velocities based on visible matter alone. This indicates the presence of an invisible mass, which is believed to be dark matter. Additionally, the shape of the rotation curve can also provide evidence for the existence of dark matter in a galaxy.

Similar threads

B What is the mass distribution and rotation curve of galaxy IC1101?
Replies
4
Views
2K
A Data on galaxy rotation curves vs visible matter
Replies
3
Views
1K
What Causes Asymmetric Rotational Velocities in Galaxies?
Replies
1
Views
2K
How to Calculate Rotation Curves for a Spiral Galaxy?
Replies
2
Views
1K
I Seifert -Solutions of Einstein's equations give flat galactic rotation curves
Replies
14
Views
2K
I Anomalous contribution to galactic rotation curves due to stochastic s
Replies
2
Views
2K
I Calculating the Rotation Curves of Galactic Disks
Replies
1
Views
2K
I Explanation for Galaxy Rotation Curves
Replies
12
Views
927
Hubble redshift and calculation of galactic rotation curves
Replies
3
Views
2K
Flat galaxy rotation curves without dark matter
Replies
1
Views
2K

Hot Threads

Recent Insights

Back
Top