Couple Dancing

Stellar multiplicity is common amongst all stars, but becomes dominant especially for high masses.

Hence, massive stars tend to interact, exchange mass, exert tidal forces on each other and merge.

What are initial binary fractions?

What are their mass-ratio and period distributions? 

How do stars interact?

What happens when they merge?

To study this, I combine multi-epoch spectroscopy and interferometry with techniques such as spectral disentangling and qunatitative spectroscopy.


Notable relevant publications:

HR6819.jpeg

Artist's impression of the binary interaction product HR 6819, originally thought to contain a black hole 

(ESO/L. Calçada)