logo CRAQ
 

Rogue Waves on Pulsating White Dwarf Stars


J.J. Hermes


University of North Carolina



While it has been an efficient planet-discovery machine, the unblinking photometry of the Kepler space telescope has also revolutionized the way we look at pulsating stars. I will discuss some of the rapid advances Kepler has enabled in our understanding of white dwarf stars, including a completely unexpected new physical phenomenon: large-amplitude outbursts in the coolest pulsating white dwarfs. These outbursts are essentially rogue waves, sporadically increases the overall stellar brightness by up to 15%. The outbursts have provided fresh insight into how pulsation energy can be transferred through nonlinear resonances, as well as the eventual cessation of pulsations in cool white dwarfs.

Date: Jeudi, le 7 avril 2016
Heure: 11:30
Lieu: Université de Montréal
  Pavillon Roger-Gaudry, local D-460
Contact: Patrick Dufour
 

Ce site a été optimisé pour les fureteurs Microsoft Internet Explorer, version 6.0 et ultérieures, et Netscape, version 6.0 et ultérieures.