Oct
16
2020

Nucleosynthesis and observational evidences of magneto rotational driven supernovae (Opens in a new window)

IReNA Online Seminar

Seminars

Mortiz Reichert

TU Darmstadt

Abstract: About half of the heavy elements in our Universe are synthesized by one process, the rapid neutron capture process (r-process). This process requires extreme and violent environments that achieve the necessary neutron-rich conditions. Neutron star mergers and magneto rotational driven supernovae are promising candidates to host the r-process. We investigate the r-process from an observational as well as a nucleosynthesis point of view.

Oct
02
2020

Galactic archeology and the origin of the elements (Opens in a new window)

IReNA Online Seminar

Seminars

Chiaki Kobayashi

University of Hertfordshire

Abstract: Galactic chemical evolution (GCE) can provide stringent constraints not only on nuclear astrophysics but also on the formation and evolutionary history of the Milky Way itself, through an approach called Galactic archeology.

Sep
04
2020

Core-Collapse Supernovae: From Neutrino-Driven 1D Explosions to Light Curves and Spectra (Opens in a new window)

IReNA Online Seminar

Seminars

Sanjana Curtis

North Carolina State University

Abstract: The number of observed core-collapse supernova lightcurves is growing every day, providing valuable clues about progenitors, stellar evolution, the explosion mechanism, the nuclear equation of state, nucleosynthesis, and the formation of neutron stars and black holes. However, interpreting electromagnetic observables correctly is a formidable challenge, one that requires detailed and accurate theoretical modeling.

Aug
21
2020

New equations of state constrained by nuclear physics, observations, and high-density QCD calculations (Opens in a new window)

IReNA Online Seminar

Seminars

Sabrina Huth 

TU Darmstadt

Abstract: We present new equations of state for applications in core-collapse supernova and neutron star merger simulations. We start by introducing an effective mass parametrization that is fit to recent microscopic calculations up to twice saturation density. This is important to capture the predicted thermal effects, which have been shown to determine the proto-neutron star contraction in supernova simulations.

Jun
19
2020

A halo of chemically primitive stars around an ancient dwarf galaxy. Online Seminar by Ani Chiti (MIT) (Opens in a new window)

IReNA Online Seminar

Seminars

The Milky Way is surrounded by dozens of ultra-faint dwarf galaxies. These systems are the remnants of the earliest galaxies, and spectroscopy of their stars thereby reveals the elements produced by chemical evolution in a primitive, self-contained environment. Previous spectroscopic studies, however, had largely been limited to stars within the core of these galaxies (~2 half-light radii) due to the sparseness of their distant stars.

Jun
05
2020

Coulomb dissociation of 16O into 4He and 12C featuring Kathrin Gobel (Opens in a new window)

IReNA Online Seminar

Seminars

Abstract:

The fusion reaction of carbon and helium to oxygen is the key to understanding the evolution of stars and the relative abundances of both elements. The reaction rate of 12C(a,g)16O has to be known with an uncertainty of lower than 10% at a center-of-mass energy of 300 keV during Helium burning conditions. So far, experiments have studied the reaction down to about 1 MeV.

May
29
2020

The Art of Becoming a Better Mentor and Mentee (Pt. 2 of Series) (Opens in a new window)

IReNA Online Seminar

Seminars

The Seminar will begin at 2pm EST Online Seminar featuring Donna Dean (American Chemical Society).

Abstract:

In the second webinar, mentoring approaches will be addressed for both mentors and mentees.  Factors that may impact the mentoring relationship and key topics and questions for mentoring discussions will be covered.

The content of each webinar should help participants reflect on past experiences and understand how they can build and sustain more effective mentoring relationships in the future. 

May
22
2020

Developing Strong Mentoring Relationships (Pt. 1 of Series) (Opens in a new window)

IReNA Online Seminar

Seminars

The Seminar will begin at 2pm EST Online Seminar featuring Donna Dean (American Chemical Society).

Abstract:

The first webinar will focus on tools, techniques, and strategies to seek out appropriate mentors for strong mentoring relationships. . The do's and don'ts involved for mentees and mentors will be covered.  

The content of each webinar should help participants reflect on past experiences and understand how they can build and sustain more effective mentoring relationships in the future. 

Apr
17
2020

New Results on Stellar Neutrinos. Online Seminar by Frank Timmes (Opens in a new window)

IReNA online Seminar

Seminars

Abstract: Over the next decade, neutrino astronomy will probe the rich astrophysics of neutrino production in the sky, including neutrinos from the Sun, core-collapse supernova (e.g., SN 1987A), and relativistic jets (e.g., blazar TXS 0506+056). On the observational side of this new era, the Super-Kamiokande with Gadolinium, Jiangmen Underground Neutrino Observatory, XENON, and future liquid scintillator neutrino experiments usher in a new generation of multi-purpose neutrino detectors designed to open new avenues for potentially observing currently undetected neutrinos.

Apr
03
2020

Collective neutrino flavor oscillations in supernovae from a many body perspective (E. Rrapaj) (Opens in a new window)

IReNA online seminar

Seminars

Presented by Ermal Rrapaj from the University of Minnesota

Abstract: I study the flavor evolution of a dense neutrino gas by considering vacuum contributions, mat-ter effects and neutrino self-interactions. Assuming a system of two flavors in a uniform matter background, the time evolution of the many-body system in discretized momentum space is com-puted. The multi-angle neutrino-neutrino interactions are treated exactly and compared to both the single-angle approximation and mean field calculations.  I study various configurations of up to twenty neutrinos.