# Three new pulsating sdB stars discovered with SuperWASP

## TL;DR

This paper reports the discovery of three new pulsating subdwarf B stars using SuperWASP data, including two p-mode pulsators and one hybrid star with both p- and g-modes, expanding the known pulsator types.

## Contribution

The study identifies three new pulsating sdB stars, including the first hybrid pulsator discovered in the SuperWASP archive, providing new data for asteroseismology.

## Key findings

- Two stars are p-mode pulsators with periods around 136-373 seconds.
- One star is a hybrid pulsator with both p- and g-modes.
- Spectroscopic analysis suggests some stars may have additional undetected modes.

## Abstract

We present an analysis of three new pulsating subdwarf B stars discovered in the SuperWASP archive. Two of the stars, J1938+5609 and J0902-0720, are p-mode pulsators; J1938+5609 shows a pulsation at 231.62 d$^{-1}$ ($P=373$ s; 2681 $\mu$Hz) with an amplitude of 4 mmag, whereas J0902-0720 pulsates at frequencies 636.74 d$^{-1}$ ($P=136$ s; 7370 $\mu$Hz) and 615.34 d$^{-1}$ ($P=140$ s; 7122 $\mu$Hz), with amplitudes 7.27 and 1.53 mmag, respectively. The third star, J2344-3427, is a hybrid pulsator with a p-mode frequency at 223.16 d$^{-1}$ ($P=387$ s; 2583 $\mu$Hz) and a corresponding amplitude of 1.5 mmag, and g modes in the frequency range $8.68-28.56$ d$^{-1}$ ($P=3025-9954$ s; $100-331$ $\mu$Hz) and amplitudes between 0.76 and 1.17 mmag. Spectroscopic results place J1938+5609 and J2344-3427 among the long-period or hybrid pulsators, suggesting there may be further modes in these stars below our detection limits, with J0902-0720 placed firmly amongst the p-mode pulsators.