- #1
gunhed508
- 10
- 1
I have a data set of 120k star systems that I'd like to import into a project, and, while it has a lot of useful infomation, I'd like to display these stars in a visual fashion. This means that I need to figure out the radius, when zoomed into the star system, and its mass, to simulate objects in orbit. If I have the radius, I can appoximate its mass. I have a basic idea of how to color them.
The data set I've chosen gives me the Spectral Class, the B-V Color Index, and the Luminosity of each star, and I'm hoping that's enough to plug into some math out there to approximate the radius and/or mass. When I checked out this data, I found some weird spectral codes outside of the typical, established OBAFGKM set, such as D, C, S, R, W, N, and P. This code will basically determine the Temperature, as I understand it, thus determining the Radius, but I'm not sure where these fit in. "D" is a white dwarf, I think, for example, and "C" is a Carbon star, but I don't have any temperature info on those or the others.
My main question is this: how do I calculate the stars' radii and/or mass from the data I have?
The data set I'm looking at is here:
http://astronexus.com/node/34
The description of the data headers is here:
https://github.com/astronexus/HYG-Database/blob/master/README.md
This is the breakdown of spectral classes:
32182 K
25605 F
22798 G
18697 A
10413 B
5831 M
3050 <no data>
282 D
264 O
162 C
102 S
89 R
74 W
61 N
4 P
The data set I've chosen gives me the Spectral Class, the B-V Color Index, and the Luminosity of each star, and I'm hoping that's enough to plug into some math out there to approximate the radius and/or mass. When I checked out this data, I found some weird spectral codes outside of the typical, established OBAFGKM set, such as D, C, S, R, W, N, and P. This code will basically determine the Temperature, as I understand it, thus determining the Radius, but I'm not sure where these fit in. "D" is a white dwarf, I think, for example, and "C" is a Carbon star, but I don't have any temperature info on those or the others.
My main question is this: how do I calculate the stars' radii and/or mass from the data I have?
The data set I'm looking at is here:
http://astronexus.com/node/34
The description of the data headers is here:
https://github.com/astronexus/HYG-Database/blob/master/README.md
This is the breakdown of spectral classes:
32182 K
25605 F
22798 G
18697 A
10413 B
5831 M
3050 <no data>
282 D
264 O
162 C
102 S
89 R
74 W
61 N
4 P