Editing Stellar classification (section)

==== Extended white dwarf spectral types ====
[[File:Sirius A and B Hubble photo.jpg|thumb|[[Sirius]] A and B (a [[white dwarf]] of type DA2) resolved by [[Hubble Space Telescope|Hubble]]]]
* DAB – a hydrogen- and helium-rich white dwarf displaying neutral helium lines
* DAO – a hydrogen- and helium-rich white dwarf displaying ionized helium lines
* DAZ – a hydrogen-rich metallic white dwarf
* DBZ – a helium-rich metallic white dwarf

A different set of spectral peculiarity symbols are used for white dwarfs than for other types of stars:<ref name="sionspectra"/>

{| class="wikitable"
|-
! Code
! Spectral peculiarities for stars
|-
! P
| Magnetic white dwarf with detectable polarization
|-
! E
| Emission lines present
|-
! H
| Magnetic white dwarf without detectable polarization
|-
! V
| Variable
|-
! PEC
| Spectral peculiarities exist
|}