Date: 25.03.2025

Joachim Borowicz (OAUW,PL)

Unveiling the mystery of BLAPs with OGLE

Abstract:
Blue Large-Amplitude Pulsators (BLAPs) are a rare class of pulsating stars, first identified in 2017 with an initial sample of 14 objects. These hot stars exhibit brightness variations of 0.1-0.4 mag with timescales ranging from a few minutes to over an hour, making them unique among pulsating stars. Over the years, only a few dozen BLAPs had been identified, making it difficult to precisely determine their parameter ranges and fully characterize their properties. However, a recent series of searches within the OGLE dataset, covering over two billion stars in the Galactic disk and bulge, has significantly expanded the known sample to nearly 200 objects. In this presentation, I will discuss the impact of these discoveries on our understanding of BLAPs and their place in stellar evolution.