I want information on:

Information for:

NAM2012 - All Presentation Details

Record 723 of 756

First | Previous | Next | Last | All  

Duplicity in stellar populations

Author: Dr John Eldridge

University of Auckland


Session: STA2: Binary Stars: Duplicity is Everywhere

Presentation type: Talk      11:45  Thursday 29th 11:45-13:00 


There is growing consensus that the binary fraction of massive stars is close to 100%. Therefore we cannot ignore the effect that binaries have on stellar systems. The evolution of binaries is strange and varied compared to single star evolution where only the initial mass determines a star's fate. Instead a binary star's fate also depends on the relative mass of its companion and the initial orbital separation. These two facts essentially determine whether the stars will interact, or "get in each other's way", and importantly during which phase of evolution. I will outline the common evolutionary pathways for binary stars and discuss how this will effect observations of stellar populations in our own Galaxy to those at the edge of the observable Universe. Showing examples of synthetic stellar populations, calculated using the Binary Population and Spectral Synthesis (BPASS; code, providing closer agreement to observations when stellar duplicity is accounted for.

First | Previous | Next | Last | All