What do the numbers for the V-I filter mean?

[deleted-404932]

Hi!

My name is Grace and I am in 8th grade. I am doing The Milky Way and Beyond: Globular Clusters for my science fair experiment. In the experiment, I need to take the V-I color data from the Milky Way and M87 galaxies and graph it; therefore, I also need to make inferences on the data. However, I did a boatload of research and could not find out what the numbers mean. I could only find information on what the B-V data means, but not the V-I. Are they the same thing? Or is there a difference? What number corresponds with each color?

Hope you can help,
Grace

(Here is the url to the project information)
https://www.sciencebuddies.org/science- ... r+clusters

[pswiatko]

Hi Grace,

Thanks for posting!

I did a little bit of research on this and couldn't find a definitive answer to answer your question. Please post this in the Physical Sciences subsection of the forum and I'm sure someone there should be able to help you!

Peter S.