Long-term photometric observations in the field of the star formation region NGC7129

TL;DR

This study presents long-term optical photometric observations of PMS stars in NGC 7129, identifying known and new variable stars, including a newly discovered PMS star with rapid, large-amplitude brightness variations.

Contribution

It provides detailed light curves and spectroscopic analysis of PMS stars in NGC 7129, including the discovery of a new variable PMS star with unusual rapid brightness changes.

Findings

Identification of known PMS stars and new variable stars.

Discovery of a PMS star with rapid, large-amplitude brightness variations.

Analysis of brightness variation causes in PMS stars.

Abstract

We present results from long-term optical photometric observations of the Pre-Main Sequence (PMS) stars, located in the star formation region around the bright nebula NGC 7129. Using the long-term light curves and spectroscopic data, we tried to classify the PMS objects in the field and to define the reasons for the observed brightness variations. Our main goal is to explore the known PMS stars and discover new, young, variable stars. The new variable PMS star 2MASS J21403576+6635000 exhibits unusual brightness variations for very short time intervals (few minutes or hours) with comparatively large amplitudes (Delta I = 2.65 mag).