Dark matter effects on neutron star properties

TY - JOUR

T1 - Dark matter effects on neutron star properties

AU - Ellis, John

AU - Hütsi, Gert

AU - Kannike, Kristjan

AU - Marzola, Luca

AU - Raidal, Martti

AU - Vaskonen, Ville

PY - 2018/6/15

Y1 - 2018/6/15

N2 - We study possible effects of a dark matter (DM) core on the maximum mass of a neutron star (NS), on the mass-radius relation and on the NS tidal deformability parameter Λ. We show that all these quantities would in general be reduced in the presence of a DM core. In particular, our calculations indicate that the presence of a DM core with a mass fraction ∼5% could affect significantly the interpretation of these NS data as constraints on the nuclear equation of state (EOS), potentially excluding some EOS models on the basis of the measured mass of PSR J0348+0432, while allowing other EOS models to become consistent with the LIGO/Virgo upper limit on Λ. Specific scenarios for generating such DM cores are explored in an Appendix.

AB - We study possible effects of a dark matter (DM) core on the maximum mass of a neutron star (NS), on the mass-radius relation and on the NS tidal deformability parameter Λ. We show that all these quantities would in general be reduced in the presence of a DM core. In particular, our calculations indicate that the presence of a DM core with a mass fraction ∼5% could affect significantly the interpretation of these NS data as constraints on the nuclear equation of state (EOS), potentially excluding some EOS models on the basis of the measured mass of PSR J0348+0432, while allowing other EOS models to become consistent with the LIGO/Virgo upper limit on Λ. Specific scenarios for generating such DM cores are explored in an Appendix.

UR - http://www.scopus.com/inward/record.url?scp=85049525246&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.97.123007

DO - 10.1103/PhysRevD.97.123007

M3 - Article

AN - SCOPUS:85049525246

SN - 2470-0010

VL - 97

JO - Physical Review D

JF - Physical Review D

IS - 12

M1 - 123007

ER -