Elizabeth Stanway
Gather.town id
VRO01
Poster Title
Constraining Stellar binarity with VRO LSST Observations
Institution
University of Warwick
Abstract (short summary)
Binary star evolution can have a significant impact on the lifetime of massive stars, and on the manner in which they end their lives. We have explored an extensive grid of binary population synthesis models to evaluate whether supernova transient type ratios may provide an insight into the binary star fraction amongst both massive and low mass stars (Stanway et al 2020). LSST at the VRO has the potential to evaluate these type ratios with unprecedented precision, if the survey completeness and classification uncertainties can be robustly evaluated. In this poster we discuss possible constraints on stellar binarity that can be obtained from supernova surveys.
Plain text (extended) Summary
This poster explores the uncertainties that arise from unknown parameters of the binary star population, using the Binary Population and spectral synthesis (BPASS) model suite. Figures demonstrate the relatively small uncertainties that arise in ionizing photon production rate and galaxy colours due to these, but also the relative strength of diagnostics using the ratio of thermonuclear to core-collapse, or stripped-envelope to hydrogen-rich, supernovae. LSST will study both galaxies and stellar transients, and assumptions made (regarding the presence or absence of binaries and their properties) will affect the interpretation of the science daa products.
URL
e.r.stanway@warwick.ac.uk
Poster file