Black holes and gravitational waves in models of minicharged dark matter
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Black holes and gravitational waves in models of minicharged dark matter. / Cardoso, Vitor; Macedo, Caio F. B.; Pani, Paolo; Ferrari, Valeria.
I: Journal of Cosmology and Astroparticle Physics, Bind 2016, Nr. 5, 054, 23.05.2016.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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T1 - Black holes and gravitational waves in models of minicharged dark matter
AU - Cardoso, Vitor
AU - Macedo, Caio F. B.
AU - Pani, Paolo
AU - Ferrari, Valeria
PY - 2016/5/23
Y1 - 2016/5/23
N2 - In viable models of minicharged dark matter, astrophysical black holes might be charged under a hidden U(1) symmetry and are formally described by the same Kerr Newman solution of Einstein-Maxwell theory. These objects are unique probes of minicharged dark matter and dark photons. We show that the recent gravitational-wave detection of a binary black-hole coalescence by aLIGO provides various observational bounds on the black hole's charge, regardless of its nature. The pre-merger inspiral phase can be used to constrain the dipolar emission of (ordinary and dark) photons, whereas the detection of the quasinormal modes set an upper limit on the final black hole's charge. By using a toy model of a point charge plunging into a Reissner-Nordstrom black hole, we also show that in dynamical processes the (hidden) electromagnetic quasinormal modes of the final object are excited to considerable amplitude in the gravitational-wave spectrum only when the black hole is nearly extremal. The coalescence produces a burst of low-frequency dark photons which might provide a possible electromagnetic counterpart to black-hole mergers in these scenarios.
AB - In viable models of minicharged dark matter, astrophysical black holes might be charged under a hidden U(1) symmetry and are formally described by the same Kerr Newman solution of Einstein-Maxwell theory. These objects are unique probes of minicharged dark matter and dark photons. We show that the recent gravitational-wave detection of a binary black-hole coalescence by aLIGO provides various observational bounds on the black hole's charge, regardless of its nature. The pre-merger inspiral phase can be used to constrain the dipolar emission of (ordinary and dark) photons, whereas the detection of the quasinormal modes set an upper limit on the final black hole's charge. By using a toy model of a point charge plunging into a Reissner-Nordstrom black hole, we also show that in dynamical processes the (hidden) electromagnetic quasinormal modes of the final object are excited to considerable amplitude in the gravitational-wave spectrum only when the black hole is nearly extremal. The coalescence produces a burst of low-frequency dark photons which might provide a possible electromagnetic counterpart to black-hole mergers in these scenarios.
KW - astrophysical black holes
KW - dark matter theory
KW - GR black holes
KW - gravitational waves / sources
KW - QUASI-NORMAL MODES
KW - PARTICLES
KW - CHARGE
KW - FIELD
KW - RADIATION
KW - LOOKING
KW - PROBE
U2 - 10.1088/1475-7516/2016/05/054
DO - 10.1088/1475-7516/2016/05/054
M3 - Journal article
VL - 2016
JO - Journal of Cosmology and Astroparticle Physics
JF - Journal of Cosmology and Astroparticle Physics
SN - 1475-7516
IS - 5
M1 - 054
ER -
ID: 299817858