Chemical Fingerprints Reveal Hidden Histories of Massive Stars Chemical Fingerprints Reveal Hidden Histories of Massive Stars
Researchers at the University of Bonn and at the Max Planck Institute for Astrophysics have found a new method to identify stars that once gained mass from a companion
Many massive stars were once part of binary systems, but their exciting past is often lost – at least it was so far. A new study at the University of Bonn and at the Max Planck Institute for Astrophysics has now found a new method to identify stars that once gained mass from a companion – stars that now appear as single objects but carry the chemical scars of their binary youth. Using a unique “chemical fingerprint” – independent of specific evolutionary models – they were able to reconstruct the binary histories of massive stars. The method has already reclassified the well-studied star γ Columbae as a former mass gainer – challenging long-held assumptions about its origin– and offered new insight into Supernova SN 1987A’s progenitor. The findings have now been published in “Nature Astronomy.”
