Mode identification in 3 pulsating hot subdwarfs

SB 459 (TIC 067584818), SB 815 (TIC 169285097), and PG 0342+026 (TIC 457168745) have been monitored during single sectors resulting in 27d coverage. These data sets allowed for detecting, in each star, a few tens of frequencies that we interpreted as stellar oscillations.

We found no multiplets, though we partially constrained mode geometry by means of period spacing, which recently became a key tool in analyses of pulsating subdwarf B stars. Standard routine that we have used allowed us to select candidates for trapped modes that surely bear signatures of non-uniform chemical profile inside the stars. We have also done statistical analysis using collected spectroscopic and asteroseismic data of previously known subdwarf B stars along with our three stars.