16th OMEG Journal Club

Friday May 12, 2023, 4:30 PM → 6:00 PM Asia/Seoul

Baird hall 320

Jubin Park (OMEG & Soongsil University)

16th OMEG JC Date :
Friday, May 12, 2023
(2023년 5월 12일 금요일)

Meeting Place :
Physics seminar room(320) @ Baird Hall
(물리학과 세미나실(320) @ 베어드홀)

Speaker : Dr. Jubin Park

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Title: Possible nature of dark matter

Reference : Wasif Husain and Anthony W. Thomas JCAP10(2021)086

Abstract : (Note: same as the abstract of the paper to be introduced)
We present a study of neutron star models that contain dark matter (DM) in the core.
The DM is assumed to have a particle nature and to be self-interacting. Using constraints on 

the mass and radius of neutron stars, we investigate the allowed properties of either bosonic 

or fermionic DM particles. We consider cases where it constitutes up to 15% of the mass of 

the star, even though conventional mechanisms cannot generate such large fractions. 

For this purpose three different models of neutron stars are considered, the first involving 

nucleons only, the second including hyperons, and the last involving strange matter in the core.

Different EoSs are constructed for the various cases of fermionic and bosonic DM. These EoSs

are solved for selected properties of the DM particles and the results are tested against mass,

radius and tidal deformability constraints for neutron stars. The distribution of energy density of

DM and ordinary matter inside the neutron stars is also presented. It is found that if the DM is

fermionic in nature it does not just sit in the core but it is present everywhere in the star, from

the centre to outside the surface and may even envelop it.
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