On the Properties of Blue Large-Amplitude Pulsators. No BLAPs in the Magellanic Clouds

2018/02/13 by P. Pietrukowicz, Pietrukowicz, Pawel
Physics and Astronomy · #Astro and Planetary Science #Astrophysics and Star Formation Studies #FOS: Physical sciences #Solar and Stellar Astrophysics (astro-ph.SR) #Stellar, planetary, and galactic studies

paper · pdf · doi:10.48550/arxiv.1802.04405

openalex publication_date 2018/02/13 · openalex created_date 2018/02/23 · openalex updated_date 2026/07/28

Abstract

We present the properties of the recently discovered class of variable stars, Blue Large-Amplitude Pulsators (BLAPs). These extremely rare, short-period pulsating objects were detected thanks to regular, high-cadence observations of hundreds of millions of Milky Way stars by the OGLE variability survey. The new variables closely resemble classical pulsators, Cepheids, and RR Lyrae-type stars, but at effective temperatures at which pulsations are due to the presence of iron-group elements. Theory shows that BLAPs are evolved low-mass stars with a giant-like structure, but their origin remains a mystery. In this contribution, we report the negative result of a search for BLAPs in the whole Magellanic System.

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