Accretion of Dark Matter by Stars
Publikation: Bidrag til tidsskrift › Letter › Forskning › fagfællebedømt
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Accretion of Dark Matter by Stars. / Brito, Richard; Cardoso, Vitor; Okawa, Hirotada.
I: Physical Review Letters, Bind 115, Nr. 11, 111301, 09.09.2015.Publikation: Bidrag til tidsskrift › Letter › Forskning › fagfællebedømt
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TY - JOUR
T1 - Accretion of Dark Matter by Stars
AU - Brito, Richard
AU - Cardoso, Vitor
AU - Okawa, Hirotada
PY - 2015/9/9
Y1 - 2015/9/9
N2 - Searches for dark matter imprints are one of the most active areas of current research. We focus here on light fields with mass m(B), such as axions and axionlike candidates. Using perturbative techniques and full-blown nonlinear numerical relativity methods, we show the following. (i) Dark matter can pile up in the center of stars, leading to configurations and geometries oscillating with a frequency that is a multiple of f = 2.5 x 10(14) (m(B)c(2)/eV) Hz. These configurations are stable throughout most of the parameter space, and arise out of credible mechanisms for dark-matter capture. Stars with bosonic cores may also develop in other theories with effective mass couplings, such as (massless) scalar-tensor theories. We also show that (ii) collapse of the host star to a black hole is avoided by efficient gravitational cooling mechanisms.
AB - Searches for dark matter imprints are one of the most active areas of current research. We focus here on light fields with mass m(B), such as axions and axionlike candidates. Using perturbative techniques and full-blown nonlinear numerical relativity methods, we show the following. (i) Dark matter can pile up in the center of stars, leading to configurations and geometries oscillating with a frequency that is a multiple of f = 2.5 x 10(14) (m(B)c(2)/eV) Hz. These configurations are stable throughout most of the parameter space, and arise out of credible mechanisms for dark-matter capture. Stars with bosonic cores may also develop in other theories with effective mass couplings, such as (massless) scalar-tensor theories. We also show that (ii) collapse of the host star to a black hole is avoided by efficient gravitational cooling mechanisms.
KW - BOSON-FERMION STARS
KW - STABILITY
KW - CONFIGURATIONS
KW - PARTICLES
U2 - 10.1103/PhysRevLett.115.111301
DO - 10.1103/PhysRevLett.115.111301
M3 - Letter
VL - 115
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 11
M1 - 111301
ER -
ID: 300070471