Instabilities of Scalar Fields around Oscillating Stars
Publikation: Bidrag til tidsskrift › Letter › Forskning › fagfællebedømt
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Instabilities of Scalar Fields around Oscillating Stars. / Ikeda, Taishi; Cardoso, Vitor; Zilhao, Miguel.
I: Physical Review Letters, Bind 127, Nr. 19, 191101, 05.11.2021.Publikation: Bidrag til tidsskrift › Letter › Forskning › fagfællebedømt
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TY - JOUR
T1 - Instabilities of Scalar Fields around Oscillating Stars
AU - Ikeda, Taishi
AU - Cardoso, Vitor
AU - Zilhao, Miguel
PY - 2021/11/5
Y1 - 2021/11/5
N2 - The behavior of fundamental fields in strong gravity or nontrivial environments is important for our understanding of nature. This problem has interesting applications in the context of dark matter, of dark energy physics, or of quantum field theory. The dynamics of fundamental fields has been studied mainly in static or stationary backgrounds, whereas most of our Universe is dynamic. In this Letter we investigate "blueshift" and parametric instabilities of scalar fields in dynamical backgrounds, which can be triggered (for instance) by oscillating stars in scalar-tensor theories of gravity. We discuss possible implications of our results, which include constraints on an otherwise hard-to-access parameter space of scalar-tensor theories.
AB - The behavior of fundamental fields in strong gravity or nontrivial environments is important for our understanding of nature. This problem has interesting applications in the context of dark matter, of dark energy physics, or of quantum field theory. The dynamics of fundamental fields has been studied mainly in static or stationary backgrounds, whereas most of our Universe is dynamic. In this Letter we investigate "blueshift" and parametric instabilities of scalar fields in dynamical backgrounds, which can be triggered (for instance) by oscillating stars in scalar-tensor theories of gravity. We discuss possible implications of our results, which include constraints on an otherwise hard-to-access parameter space of scalar-tensor theories.
KW - RADIAL OSCILLATIONS
KW - NORMAL-MODES
KW - GRAVITY
KW - WAVES
U2 - 10.1103/PhysRevLett.127.191101
DO - 10.1103/PhysRevLett.127.191101
M3 - Letter
C2 - 34797161
VL - 127
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 19
M1 - 191101
ER -
ID: 285309954