TY  - JOUR
A1  - Dietrich, Tim
A1  - Hinderer, Tanja
A1  - Samajdar, Anuradha
T1  - Interpreting binary neutron star mergers
BT  - describing the binary neutron star dynamics, modelling gravitational waveforms, and analyzing detections
JF  - General relativity and gravitation : GRG journal
N2  - Gravitational waves emitted from the coalescence of neutron star binaries open a new window to probe matter and fundamental physics in unexplored, extreme regimes. To extract information about the supranuclear matter inside neutron stars and the properties of the compact binary systems, robust theoretical prescriptions are required. We give an overview about general features of the dynamics and the gravitational wave signal during the binary neutron star coalescence. We briefly describe existing analytical and numerical approaches to investigate the highly dynamical, strong-field region during the merger. We review existing waveform approximants and discuss properties and possible advantages and shortcomings of individual waveform models, and their application for real gravitational-wave data analysis.
KW  - gravitational waves
KW  - neutron stars
KW  - equation of state
KW  - tidal effects
Y1  - 2021
U6  - https://doi.org/10.1007/s10714-020-02751-6
SN  - 0001-7701
SN  - 1572-9532
VL  - 53
IS  - 3
PB  - Springer Science + Business Media B.V.
CY  - New York, NY [u.a.]
ER  - 
TY  - JOUR
A1  - Emma, Mattia
A1  - Schianchi, Federico
A1  - Pannarale, Francesco
A1  - Sagun, Violetta
A1  - Dietrich, Tim
T1  - Numerical simulations of dark matter admixed neutron star binaries
JF  - Particles
N2  - Multi-messenger observations of compact binary mergers provide a new way to constrain the nature of dark matter that may accumulate in and around neutron stars. In this article, we extend the infrastructure of our numerical-relativity code BAM to enable the simulation of neutron stars that contain an additional mirror dark matter component. We perform single star tests to verify our code and the first binary neutron star simulations of this kind. We find that the presence of dark matter reduces the lifetime of the merger remnant and favors a prompt collapse to a black hole. Furthermore, we find differences in the merger time for systems with the same total mass and mass ratio, but different amounts of dark matter. Finally, we find that electromagnetic signals produced by the merger of binary neutron stars admixed with dark matter are very unlikely to be as bright as their dark matter-free counterparts. Given the increased sensitivity of multi-messenger facilities, our analysis gives a new perspective on how to probe the presence of dark matter.
KW  - numerical relativity
KW  - dark matter
KW  - neutron stars
KW  - equation of state;
KW  - gravitational-wave astronomy
KW  - multi-messenger astrophysics
Y1  - 2022
U6  - https://doi.org/10.3390/particles5030024
SN  - 2571-712X
VL  - 5
IS  - 3
SP  - 273
EP  - 286
PB  - MDPI
CY  - Basel
ER  -