LISA and the Existence of a Fast-merging Double Neutron Star Formation Channel
Publikation: Bidrag til tidsskrift › Letter › Forskning › fagfællebedømt
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LISA and the Existence of a Fast-merging Double Neutron Star Formation Channel. / Andrews, Jeff J.; Breivik, Katelyn; Pankow, Chris; D'Orazio, Daniel J.; Safarzadeh, Mohammadtaher.
I: Astrophysical Journal Letters, Bind 892, Nr. 1, 9, 20.03.2020.Publikation: Bidrag til tidsskrift › Letter › Forskning › fagfællebedømt
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TY - JOUR
T1 - LISA and the Existence of a Fast-merging Double Neutron Star Formation Channel
AU - Andrews, Jeff J.
AU - Breivik, Katelyn
AU - Pankow, Chris
AU - D'Orazio, Daniel J.
AU - Safarzadeh, Mohammadtaher
PY - 2020/3/20
Y1 - 2020/3/20
N2 - Using a Milky Way (MW) double neutron star (DNS) merger rate of 210 Myr(-1), as derived by the Laser Interferometer Gravitational-Wave Observatory (LIGO), we demonstrate that the Laser Interferometer Space Antenna (LISA) will detect on average 240 (330) DNSs within the MW for a 4 yr (8 yr) mission with a signal-to-noise ratio greater than 7. Even adopting a more pessimistic rate of 42 Myr(-1), as derived by the population of Galactic DNSs, we find a significant detection of 46 (65) MW DNSs. These DNSs can be leveraged to constrain formation scenarios. In particular, without prior information on a particular system's position and orbital period, traditional NS-discovery methods using radio telescopes alone are insensitive to DNSs with P-orb less than or similar to 1 hr (merger times less than or similar to 10 Myr). If a fast-merging channel exists that forms DNSs at these short orbital periods, LISA affords, perhaps, the best opportunity to observationally identify and characterize these systems; we show that toy models for possible formation scenarios leave imprints on DNS orbital eccentricities, which may be measured by LISA for values as small as similar to 10(-2).
AB - Using a Milky Way (MW) double neutron star (DNS) merger rate of 210 Myr(-1), as derived by the Laser Interferometer Gravitational-Wave Observatory (LIGO), we demonstrate that the Laser Interferometer Space Antenna (LISA) will detect on average 240 (330) DNSs within the MW for a 4 yr (8 yr) mission with a signal-to-noise ratio greater than 7. Even adopting a more pessimistic rate of 42 Myr(-1), as derived by the population of Galactic DNSs, we find a significant detection of 46 (65) MW DNSs. These DNSs can be leveraged to constrain formation scenarios. In particular, without prior information on a particular system's position and orbital period, traditional NS-discovery methods using radio telescopes alone are insensitive to DNSs with P-orb less than or similar to 1 hr (merger times less than or similar to 10 Myr). If a fast-merging channel exists that forms DNSs at these short orbital periods, LISA affords, perhaps, the best opportunity to observationally identify and characterize these systems; we show that toy models for possible formation scenarios leave imprints on DNS orbital eccentricities, which may be measured by LISA for values as small as similar to 10(-2).
KW - Neutron stars
KW - Gravitational waves
KW - Gravitational wave detectors
KW - Binary pulsars
KW - BLACK-HOLE MERGERS
KW - GAMMA-RAY BURSTS
KW - GLOBULAR-CLUSTERS
KW - GRAVITATIONAL-RADIATION
KW - ECCENTRIC SOURCES
KW - COMPACT BINARIES
KW - EVOLUTION
KW - PULSAR
KW - RATES
KW - PROGENITORS
U2 - 10.3847/2041-8213/ab5b9a
DO - 10.3847/2041-8213/ab5b9a
M3 - Letter
VL - 892
JO - The Astrophysical Journal Letters
JF - The Astrophysical Journal Letters
SN - 2041-8205
IS - 1
M1 - 9
ER -
ID: 247442430