The evolutionary state of chemically peculiar stars in NGC 2516 using GAIA data on singles and binaries
Authors/Creators
- 1. Leibniz-Institut für Astrophysik Potsdam (AIP)
- 2. European Southern Observatory
- 3. Main Astronomical Observatory, Ukraine
- 4. Institute of Astronomy, Russian Academy of Sciences, Russia
Description
The origin of the magnetism in stars with radiative envelopes and the role the
magnetic field plays in their evolution remain unknown. The most popular
scenario involves a merging event or a common envelope evolutionary phase. Mass
transfer in stellar merging may rejuvenate the mass gaining star, while the
induced differential rotation is thought to be a key ingredient to generate a
magnetic field. One of the observable manifestations of the presence of
coalesced stars or stars experiencing a common envelope evolution is the
existence of blue straggler stars. Studies of open clusters and associations
have seen great improvement with the advent of Gaia DR3 data, allowing us to
determine photometric and kinematic ages, including runaway status of upper-main
sequence stars possessing magnetic fields. In our poster we discuss our
assessment of the evolutionary state of eleven binary and single chemically
peculiar stars, among them stars with strong magnetic fields previously
classified as highly probable members of the open cluster NGC 2516.