2
$\begingroup$

Where can I get a more detailed breakdown of Spectral Classes. Wikipedia only has it at Letter level rather than sublevel.

For example, https://en.wikipedia.org/wiki/Stellar_classification has B ranging from 10,000 - 30,000K. B0 is different to a B9, what would be the temperature range for a B0 or a B9 but not limiting to B but for all letters?

I'm not just looking at Temperature, I'm after Mass, Radius, Luminosity, Hydrogen Lines etc.

The closest that I've come is https://sites.uni.edu/morgans/astro/course/Notes/section2/spectraltemps.html but it doesn't mention types II or IV and doesn't have Radius or Mass.

$\endgroup$
  • $\begingroup$ Spectral type is connected with position in the HR diagram, there is no direct or one-to-one mapping with mass, except perhaps approximately on the main sequence, and even then it would be age and composition dependent. $\endgroup$ – Rob Jeffries Oct 11 '19 at 22:54
  • $\begingroup$ Eric Mamajek has a nice table for the main sequence (luminosity class V), but other luminosity classes have much less well-defined relationships. (And even the main sequence will have dependences on things like metallicity that aren't captured in the table). $\endgroup$ – antispinwards Oct 12 '19 at 10:11

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.