Description
3 min. talks by poster presenters
Dukjae Jang
29/06/2017, 17:10
3 Min. Talk for Poster Presentor
By assuming the existence of extra-dimensional sterile neutrinos in the early universe, we investigate the sterile neutrino effects on the big bang nucleosynthesis (BBN) and constrain some parameters associated with the sterile neutrino properties. First, for cosmic expansion rate, we take into account effects by a five-dimensional bulk and intrinsic tension of the brane embedded in the bulk,...
Byul Moon
29/06/2017, 17:13
3 Min. Talk for Poster Presentor
In astrophysical environments, the beta($\beta$)-decay of unstable nuclei plays a crucial role in generating the final isotopic abundances along with rapid neutron-capture reactions (r-processes). The $\beta$-decay strengths are largely influenced by the so-called Gamow-Teller (G-T) interaction that is closely related to the spin-isospin interaction. This spin-isospin excitation is one of...
Minsik Kwag
29/06/2017, 17:16
3 Min. Talk for Poster Presentor
Intensity monitoring and particle identification of beams and beam-like heavy recoils can improve the accuracy of a cross section measurement in nuclear astrophysics. A gas-filled ionization chamber is still well-suited for this purpose due to its sturdiness against radiation damage and relatively good energy resolution. To overcome the maximum counting rate of about 100,000 pps for...
Soomi Cha
29/06/2017, 17:19
3 Min. Talk for Poster Presentor
The 18Ne(α,p)21Na reaction, one of the breakout reactions from hot-CNO cycle, plays a crucial role in understanding the X-ray bursts and the nucleosynthesis in the rp-process. Because this reaction rate is dominated by the energy levels of 22Mg above the α-threshold at 8.14 MeV, studying the 22Mg nuclide may improve our understanding of the X-ray burst. In order to study the level properties...
Heamin Ko
29/06/2017, 17:22
3 Min. Talk for Poster Presentor
The star which the end is core collapse supernova, emit amount of neutrinos in this process. While these neutrinos pass through each layer of the star, they react with the nuclides of the star. We consider that because the origin of some elements are explained mostly by this neutrino process. One of that kinds of element is 98Tc. We checked that the contribution of reactions related to 98Tc...
Byeongchan Park
29/06/2017, 17:25
3 Min. Talk for Poster Presentor
Supernova (SN) is one of violent phenomena in the universe. SN generates heavy elements and leaves neutron star behind. It has been known that the physical properties of SN depend on those of pre-supernova such as mass, metallicities including distribution of elements, and the density and temperature profile which are obtained from the stellar evolution calculation. In particular, the...
Gwangeon Seong
29/06/2017, 17:28
3 Min. Talk for Poster Presentor
Previous simulations of X-ray bursts, for example, those performed by MESA (Modules for Experiments in Stellar Astrophysics) could not address the dynamical effects of strong radiation, which are important to explain the photospheric radial expansion (PRE) phenomena seen in many XRBs. In order to study the effects of strong radiation, we use SNEC (the SuperNova Explosion Code), a 1D Lagrangian...
SeungYeong Hong
29/06/2017, 17:31
3 Min. Talk for Poster Presentor
It has been known that there is a linear proportional relationship between the column densities of CH and OH measured toward bright UV-emitting stars, although there are four outliers in this relationship among the total 24 measured targets. We investigate reasonable configurations of diffuse interstellar medium (ISM) which could explain the observed relationship by considering the followings....
Dahee Kim
29/06/2017, 17:34
3 Min. Talk for Poster Presentor
The gamma-rays emitted from novae are mainly due to e+-e- annihilation, and the positrons are mostly from the beta decay of 18F. The amount of 18F in nova is determined by two reaction channels of 18F(p,a)15O and 18F(p,γ)19Ne. The 18F(p,a)15O reaction is known as the main destruction channel, and it also affects the reaction rate for calculating the type I x-ray burst model. For this reason,...
Daniele Sorini
29/06/2017, 17:37
3 Min. Talk for Poster Presentor
Understanding the physics of the gas present in galactic halos and spread among galaxies is of primary importance to get insight into galaxy formation and to address the open questions about the epoch of reionization. In particular, outflows of gas produced by stellar feedback (e.g. supernovae, stellar winds) or an AGN alter the physical state of gas in the circum- and intergalactic media (CGM...
Hideki Shimizu
29/06/2017, 17:40
3 Min. Talk for Poster Presentor
Nuclear isomers are commonly known and discussed, yet the term is difficult to define precisely. Generally, isomers are excited states in nuclei showing significantly different lifetimes compared to nearby states owing to various structural anomalies. Their existence in astrophysical environments leads to fascinating intricacies in the production of elements which might otherwise be difficult...
