Analysis on the black hole formations inside old neutron stars by isospin-violating dark matter with self-interaction

Guey Lin Lin, Yen Hsun Lin

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Fermionic dark matter (DM) with attractive self-interaction is possible to form black holes (BH) inside the Gyr-old neutron stars (NS). Therefore by observing such NS corresponding to their adjacent DM environments can place bounds on DM properties, eg. DM-baryon cross section σχ b, DM mass mχ, dark coupling αχ and mediator mass mφ. In case of isospin violation, DM couples to neutron and proton in different strengths. Even NS is composed of protons roughly one to two percent of the total baryons, the contribution from protons to the DM capture rate could be drastically changed in the presence of isospin violation. We demonstrate that this effect can be important in certain cases. On the other hand, DM-forming BH inside the star is subject to many criteria and the underlying dynamics is rich with interesting features. We also systematically review the relevant physics based on the virial equation. Moreover, an accompanied python package dm2nsbh to realize the mechanism is also released on the github for other relevant research.

Original languageEnglish
Article number022
JournalJournal of Cosmology and Astroparticle Physics
Volume2020
Issue number8
DOIs
Publication statusPublished - 2020 Aug

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics

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