Indonesian Students Club

Indonesian Students Club

skip to events

calendar tabs

  •  All 
  • Grid
  • Month
  • Week
  • Day
  • (Selected tab) Detail

Event Detail Information

Event Detail Information

Astronomy Journal Club: Kuo-Chuan Pan - 'Evidence for Two Distinct Populations of Type Ia Supernovae'

Time 12:00 pm  
Location 134 Astronomy Building
Sponsor Department of Astronomy
Event type Pizza lunch
Views 1482
Originating Calendar Astronomy Journal Club
http://arxiv.org/abs/1303.2601 http://www.sciencemag.org/content/early/2013/03/06/science.1231502 Type Ia supernovae (SNe Ia) have been used as excellent standardizable candles for measuring cosmic expansion, but their progenitors are still elusive. Here we report that the spectral diversity of SNe Ia is tied to their birthplace environments. We find that those with high-velocity ejecta are substantially more concentrated in the inner and brighter regions of their host galaxies than are normal-velocity SNe Ia. Furthermore, the former tend to inhabit larger and more-luminous hosts. These results suggest that high-velocity SNe Ia likely originate from relatively younger and more metal-rich progenitors than normal-velocity SNe Ia, and are restricted to galaxies with substantial chemical evolution.