September 21, 2023
3:00PM - 4:00PM
In Person & Online: Chem & Biomolecular Eng & Chem (CBEC) - Room 130; Zoom Webinar
Add to Calendar
2023-09-21 15:00:00
2023-09-21 16:00:00
Astronomy Colloquium - Constantine Deliyannis
Title: Light Element Tracers (Li, Be, B) and the Secret Lives of Sun-like Stars (and the Universe)
Abstract:
Helioseismology strongly supports the Standard Solar Model, yet the current surface solar lithium (Li) abundance is about a factor of 50 lower than that predicted by this model, betraying a secret past life that our Sun has led. In fact, nearly all stars exhibit lower surface Li abundances than predicted by standard theory. I will discuss how these Li abundances, together with surface stellar Be and B abundances inform us about physical processes occurring inside stars that are not included in standard theory, such as rotationally-induced mixing, diffusion, and mass loss. I will point out implications for testing Big Bang Theory when trying to determine the primordial Li abundance from Li observations in the oldest stars.
Speaker: Constantine Deliyannis (Indiana University Bloomington)
In Person & Online: Chem & Biomolecular Eng & Chem (CBEC) - Room 130; Zoom Webinar
OSU ASC Drupal 8
ascwebservices@osu.edu
America/New_York
public
Date Range
Add to Calendar
2023-09-21 15:00:00
2023-09-21 16:00:00
Astronomy Colloquium - Constantine Deliyannis
Title: Light Element Tracers (Li, Be, B) and the Secret Lives of Sun-like Stars (and the Universe)
Abstract:
Helioseismology strongly supports the Standard Solar Model, yet the current surface solar lithium (Li) abundance is about a factor of 50 lower than that predicted by this model, betraying a secret past life that our Sun has led. In fact, nearly all stars exhibit lower surface Li abundances than predicted by standard theory. I will discuss how these Li abundances, together with surface stellar Be and B abundances inform us about physical processes occurring inside stars that are not included in standard theory, such as rotationally-induced mixing, diffusion, and mass loss. I will point out implications for testing Big Bang Theory when trying to determine the primordial Li abundance from Li observations in the oldest stars.
Speaker: Constantine Deliyannis (Indiana University Bloomington)
In Person & Online: Chem & Biomolecular Eng & Chem (CBEC) - Room 130; Zoom Webinar
Department of Astronomy
astronomy@osu.edu
America/New_York
public
Title: Light Element Tracers (Li, Be, B) and the Secret Lives of Sun-like Stars (and the Universe)
Abstract:
Helioseismology strongly supports the Standard Solar Model, yet the current surface solar lithium (Li) abundance is about a factor of 50 lower than that predicted by this model, betraying a secret past life that our Sun has led. In fact, nearly all stars exhibit lower surface Li abundances than predicted by standard theory. I will discuss how these Li abundances, together with surface stellar Be and B abundances inform us about physical processes occurring inside stars that are not included in standard theory, such as rotationally-induced mixing, diffusion, and mass loss. I will point out implications for testing Big Bang Theory when trying to determine the primordial Li abundance from Li observations in the oldest stars.
