Register to reply

Stellar Classification of White Dwarfs

by piareround
Tags: white dwarf
Share this thread:
Jun7-10, 11:53 AM
P: 78
OK recently I found a really old table stars based on partally on Yerkes Classification system with a small section on white dwarf stars. It has the stars organized into groups labeled DO, DA, DB, DF, DG, DK, and DM. However, I remember that the current classification system for white dwarf stars as primarily DO, DA, DB, DQ, DZ, DC, DX.

First, Has anyone heard of the first classification system? If so why where the letters changed? What happened?

Second, I really have trouble visualizing DQ, DZ, and DC on the HR diagram compared to the other white dwarfs. Does anyone have pictures of DQ, DZ, or DC stars on the HR Diagram?
Phys.Org News Partner Astronomy news on
Mixing in star-forming clouds explains why sibling stars look alike
Thermonuclear X-ray bursts on neutron stars set speed record
How can we find tiny particles in exoplanet atmospheres?

Register to reply

Related Discussions
Coalescent of two white dwarfs Astronomy & Astrophysics 0
White dwarfs and the age of the universe Cosmology 0
Radius of white dwarfs Astronomy & Astrophysics 7
White dwarfs Astronomy & Astrophysics 2
High Density of White Dwarfs Astronomy & Astrophysics 2