Detecting double neutron stars with LISA
| Autor: | Alejandro Vigna-Gómez, Ilya Mandel, Coenraad J. Neijssel, Mike Y. M. Lau, Alberto Sesana, S. P. Stevenson |
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| Přispěvatelé: | Lau, M, Mandel, I, Vigna-Gomez, A, Neijssel, C, Stevenson, S, Sesana, A |
| Rok vydání: | 2020 |
| Předmět: |
close [binaries]
media_common.quotation_subject Population FOS: Physical sciences General Relativity and Quantum Cosmology (gr-qc) Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics General Relativity and Quantum Cosmology Gravitational waves Pulsar Binary star Eccentricity (behavior) education Solar and Stellar Astrophysics (astro-ph.SR) Astrophysics::Galaxy Astrophysics media_common High Energy Astrophysical Phenomena (astro-ph.HE) Physics education.field_of_study Gravitational wave White dwarf Astronomy and Astrophysics Binaries: Close Neutron star Astrophysics - Solar and Stellar Astrophysics gravitational waves Space and Planetary Science Sky Astrophysics::Earth and Planetary Astrophysics Astrophysics - High Energy Astrophysical Phenomena |
| Zdroj: | Lau, M Y M, Mandel, I, Vigna-Gomez, A, Neijssel, C J, Stevenson, S & Sesana, A 2020, ' Detecting double neutron stars with LISA ', Monthly Notices of the Royal Astronomical Society, vol. 492, no. 3, pp. 3061-3072 . https://doi.org/10.1093/mnras/staa002 |
| ISSN: | 1365-2966 0035-8711 |
| DOI: | 10.1093/mnras/staa002 |
| Popis: | We estimate the properties of the double neutron star (DNS) population that will be observable by the planned space-based interferometer LISA. By following the gravitational radiation driven evolution of DNSs generated from rapid population synthesis of massive binary stars, we estimate that around 35 DNSs will accumulate a signal-to-noise ratio above 8 over a four-year LISA mission. The observed population mainly comprises Galactic DNSs (94 per cent), but detections in the LMC (5 per cent) and SMC (1 per cent) may also be expected. The median orbital frequency of detected DNSs is expected to be 0.8 mHz, and many of them will be eccentric (median eccentricity of $0.11$). The orbital properties will provide insights into DNS progenitors and formation channels. LISA is expected to localise these DNSs to a typical angular resolution of $2^\circ$, with best-constrained sources localised to a few arcminutes. These localisations may allow neutron star natal kick magnitudes to be constrained through the Galactic distribution of DNSs, and make it possible to follow up the sources with radio pulsar searches. However, LISA is also expected to resolve $\sim 10^4$ Galactic double white dwarfs, many of which may have binary parameters that resemble DNSs; we discuss how the combined measurement of binary eccentricity, chirp mass, and sky location may aid the identification of a DNS. We expect the best-constrained DNSs to have eccentricities known to a few parts in a thousand, chirp masses measured to better than 1 per cent fractional uncertainty, and sky localisation at the level of a few arcminutes. Accepted by the Monthly Notices of the Royal Astronomical Society, added comparison with two more binary evolution prescriptions |
| Databáze: | OpenAIRE |
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