Data
'56Ni problem' in Canonical Supernova Explosion featuring Ryo Sawada (University of Tokyo) (Opens in a new window)
IReNA Online Seminar to begin 11am EST.
Stars that Freeze: White Dwarf Crystallization as Revealed by Gaia featuring Simon Blouin (University of Victoria) (Opens in a new window)
White dwarfs are stellar embers that simply cool down for the rest of time, eventually freezing into a solid state. This predictable evolution makes them precise cosmic clocks; they have been used for decades to measure the ages of stellar populations. But data from the Gaia space observatory is now calling into question the accuracy of this age dating technique. The cooling process appears to be much more delayed by the onset of crystallization than predicted by current models. I will present my recent work on the physics of core crystallization.
Multidimensional Modelling of Magnetic Fields in Supernovae and Their Progenitors featuring Vishnu Varma (Keele, UK) (Opens in a new window)
Core-collapse supernovae (CCSNe) are some of the brightest, most energetic events in the universe. In order to model these phenomena accurately, we need to have a diverse range of physics such as neutrino transport and neutrino interactions, general-relativistic gravity, detailed equations of state (EoS) of dense matter, magnetohydrodynamic (MHD) and detailed progenitor models.
The Contribution of Classical Novae to the Galactic Abundance of 26Al featuring Laetitia Canete (University of Surrey, UK) (Opens in a new window)
The discovery of radioactive 26Al via the observation of the 1809-keV γ ray in 1982 is one of the most famous pieces of evidence of on-going nucleosynthesis in the cosmos. The 26Al is likely to be produced dominantly in massive stars and supernovae. Nevertheless, a number of additional sources such as classical novae and AGB stars may still contribute considerably to the production of 26Al. Thus, up to 29% of the total observed 26Al abundance is predicted to have a nova origin.
High Precision Measurements to Probe the Physics of the Early Universe featuring Francesca Cavanna (INFN) (Opens in a new window)
Light elements were produced in the first few minutes of the Universe through a sequence of nuclear reactions known as Big Bang nucleosynthesis (BBN). Among the light elements produced during BBN, deuterium is an excellent indicator of cosmological parameters because its abundance is highly sensitive to the primordial baryon density.
IReNA Online Seminar featuring Michael Wiescher (Notre Dame) (Opens in a new window)
Title: The CNO cycle and the CNO Neutrinos in our Sun
IReNA Online Seminar featuring Jan Glorius (GSI) (Opens in a new window)
Title: Explosive nucleosynthesis with stored, radioactive ions
IReNA Online Seminar featuring Carolyn Raithel (Institute for Advanced Study) (Opens in a new window)
Title: Probing the Dense-Matter Equation of State with Neutron Star Mergers
IReNA Online Seminar featuring Laura Tolos (Institute of Space Sciences, ICE-CSIC) (Opens in a new window)
2pm Eastern Time / 7 pm CET. Host: Matt Caplan, Illinois State University
Title: Strangeness in the laboratory and stars
IReNA Online Seminar featuring Annika Lennarz (TRIUMF) (Opens in a new window)
Title: Nuclear Astrophysics with DRAGON
Abstract:
IReNA Online Seminar featuring Reed Essick (Perimeter Institute) (Opens in a new window)
Title: Gravitational Laboratories for Nuclear Physics
IReNA Online Seminar featuring Daid Kahl, Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH) (Opens in a new window)
Title: Radioactive Nuclides in Outer Space
Abstract: Nuclear astrophysics is generally the study of the energy generation in stars and the origins of the chemical elements. In this highly multidisciplinary field, the job of experimental nuclear physicists is to constrain the nuclear reaction rates which are linked with astronomical observables. Observation of the lightest chemical element with no stable isotopes, technetium, in stellar spectra, was the first evidence that nucleosynthesis is an on-going process in our Galaxy.
IReNA Online Seminar featuring Tilman Hartwig (University or Tokyo) (Opens in a new window)
Title: Stellar Archaeology as a Time Machine to the First Stars
IReNA Online Seminar featuring Arthur Choplin (University libre de Bruxelles) (Opens in a new window)
Title : Non-standard neutron capture processes in massive and AGB stars
IReNA Online Seminar featuring Adelle Goodwin (Curtin University) (Opens in a new window)
Title: Multi-dimensional modelling of heat flow and type I X-ray bursts on the surface of accreting neutron stars
IReNA Online Seminar featuring Stephane Goriely (University libre de Bruxelles) (Opens in a new window)
Title: Some Open Questions Related to the Nucleosynthesis of the Heavy Elements
Neutron Rich Matter in Heaven and Earth (Opens in a new window)
Jorge Piekarewicz
Florida State University
Abstract:
IReNA Online Seminar featuring Kanji Mori (Research Institute of Stellar Explosive Phenomena, Fukuoka University) (Opens in a new window)
Title: Exploring Axion-like Particles with Nearby Supernovae
A NICER View of Neutron Stars, featuring Anna Watts (University of Amsterdam) (Opens in a new window)
Professor Anna Watts
University of Amsterdam
Hosted by Chiranjib Mondal
Three-dimensional hydrodynamical simulations unravel the evolution of SN 1987A from the explosion to the supernova remnant (Opens in a new window)
Dr. Masaomi Ono
RIKEN
Abstract: Supernova 1987A (SN 1987A) provides a unique opportunity to unravel the evolution of core-collapse supernovae (CCSNe) from the explosions to their supernova remnants (SNRs) thanks to its proximity and youth. Early observation of iron lines has indicated matter mixing during the explosion to convey innermost 56Ni to outer layers. Since the density structure of the progenitor star affects the matter mixing, it provides a hint on the properties of the progenitor star.