About the existence of warm H-rich pulsating white dwarfs
About the existence of warm H-rich pulsating white dwarfs
Context. The possible existence of warm ( T eff ∼ 19 000 K) pulsating DA white dwarf (WD) stars, hotter than ZZ Ceti stars, was predicted in theoretical studies more than 30 yr ago. These studies reported the occurrence of g -mode pulsational instabilities due to the κ mechanism acting …