# One new variable candidate and six nonvariable stars at the ZZ Ceti instability strip

## TL;DR

This study reports the discovery of a new ZZ Ceti pulsator candidate and provides new pulsation detection limits for several white dwarfs near the instability strip, enhancing understanding of white dwarf variability.

## Contribution

It introduces the identification of a new pulsator candidate and establishes new detection limits for pulsations in white dwarfs near the ZZ Ceti instability strip.

## Key findings

- Discovered one new ZZ Ceti candidate star.
- Established detection limits for pulsations in four white dwarfs.
- Provided new constraints on pulsation amplitudes for two targets.

## Abstract

We present our results on the continuation of our survey searching for new ZZ Ceti stars, inspired by the recently launched TESS space mission. The seven targets were bright DA-type white dwarfs located close to the empirical ZZ Ceti instability strip. We successfully identified one new pulsator candidate, namely PM J22299+3024, derived detection limits for possible pulsations of four objects for the first time, and determined new detection limits for two targets.