https://iac.es/es/ciencia-y-tecnologia/publicaciones/gw-vir-instability-strip-light-new-observations-pg-1159-stars-discovery-pulsations
We present the results of new time-series photometric observations of 29 pre-white dwarf stars of PG 1159 spectral type, carried out in the years 2014-2022....
gw virinstability stripnew observationslight