A Multimessenger Mass Determination Method for LISA Neutron Star–White Dwarf Binaries
Determining the masses of neutron stars (NSs) accurately improves our understanding of the NS interior and complicated binary evolution. However, the masses of the systems are degenerate with the orbital inclination angle when using solely gravitational waves (GWs) or electromagnetic measurements, e...
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| Language: | English |
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IOP Publishing
2025-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/adc0fd |
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| author | Kaye Jiale Li Jane SiNan Long Kinwah Wu Albert K. H. Kong |
| author_facet | Kaye Jiale Li Jane SiNan Long Kinwah Wu Albert K. H. Kong |
| author_sort | Kaye Jiale Li |
| collection | DOAJ |
| description | Determining the masses of neutron stars (NSs) accurately improves our understanding of the NS interior and complicated binary evolution. However, the masses of the systems are degenerate with the orbital inclination angle when using solely gravitational waves (GWs) or electromagnetic measurements, especially for face-on binaries. Taking advantage of both GWs and optical observations for LISA NS–white dwarf (WD) binaries, we propose a mass determination method utilising multimessenger observational information. By combining the binary mass function obtained from optical observations and a GW mass function, which we introduce, derived from GW observations, we demonstrate how we can set improved constraints on the NS mass and break the degeneracy in the mass and viewing inclination determination. We further comment on the universal relation of the error bar of the GW mass function versus the GW signal-to-noise ratio and propose a simple method for estimating the capability of using GW observations for mass determination with LISA. We show that for ultracompact NS–WD binaries within our Galaxy, the mass of the NS can be constrained to within an accuracy of ±0.2 M _⊙ with the proposed method. |
| format | Article |
| id | doaj-art-b4efbcc4a34c437ca34ff367ab307609 |
| institution | OA Journals |
| issn | 1538-4357 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj-art-b4efbcc4a34c437ca34ff367ab3076092025-08-20T02:12:11ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-0198414110.3847/1538-4357/adc0fdA Multimessenger Mass Determination Method for LISA Neutron Star–White Dwarf BinariesKaye Jiale Li0https://orcid.org/0000-0002-1657-0265Jane SiNan Long1https://orcid.org/0000-0002-2126-0050Kinwah Wu2https://orcid.org/0000-0002-7568-8765Albert K. H. Kong3https://orcid.org/0000-0002-5105-344XMullard Space Science Laboratory, University College London , Holmbury St Mary, Surrey, RH5 6NT, UK ; j-li.19@ucl.ac.uk, sinan.long.23@ucl.ac.ukMullard Space Science Laboratory, University College London , Holmbury St Mary, Surrey, RH5 6NT, UK ; j-li.19@ucl.ac.uk, sinan.long.23@ucl.ac.uk; Institute of Astronomy, National Tsing Hua University , Hsinchu 30013, Taiwan (ROC) ; akong@gapp.nthu.edu.twMullard Space Science Laboratory, University College London , Holmbury St Mary, Surrey, RH5 6NT, UK ; j-li.19@ucl.ac.uk, sinan.long.23@ucl.ac.uk; Institute of Astronomy, National Tsing Hua University , Hsinchu 30013, Taiwan (ROC) ; akong@gapp.nthu.edu.twInstitute of Astronomy, National Tsing Hua University , Hsinchu 30013, Taiwan (ROC) ; akong@gapp.nthu.edu.twDetermining the masses of neutron stars (NSs) accurately improves our understanding of the NS interior and complicated binary evolution. However, the masses of the systems are degenerate with the orbital inclination angle when using solely gravitational waves (GWs) or electromagnetic measurements, especially for face-on binaries. Taking advantage of both GWs and optical observations for LISA NS–white dwarf (WD) binaries, we propose a mass determination method utilising multimessenger observational information. By combining the binary mass function obtained from optical observations and a GW mass function, which we introduce, derived from GW observations, we demonstrate how we can set improved constraints on the NS mass and break the degeneracy in the mass and viewing inclination determination. We further comment on the universal relation of the error bar of the GW mass function versus the GW signal-to-noise ratio and propose a simple method for estimating the capability of using GW observations for mass determination with LISA. We show that for ultracompact NS–WD binaries within our Galaxy, the mass of the NS can be constrained to within an accuracy of ±0.2 M _⊙ with the proposed method.https://doi.org/10.3847/1538-4357/adc0fdNeutron starsCompact binary starsGravitational waves |
| spellingShingle | Kaye Jiale Li Jane SiNan Long Kinwah Wu Albert K. H. Kong A Multimessenger Mass Determination Method for LISA Neutron Star–White Dwarf Binaries The Astrophysical Journal Neutron stars Compact binary stars Gravitational waves |
| title | A Multimessenger Mass Determination Method for LISA Neutron Star–White Dwarf Binaries |
| title_full | A Multimessenger Mass Determination Method for LISA Neutron Star–White Dwarf Binaries |
| title_fullStr | A Multimessenger Mass Determination Method for LISA Neutron Star–White Dwarf Binaries |
| title_full_unstemmed | A Multimessenger Mass Determination Method for LISA Neutron Star–White Dwarf Binaries |
| title_short | A Multimessenger Mass Determination Method for LISA Neutron Star–White Dwarf Binaries |
| title_sort | multimessenger mass determination method for lisa neutron star white dwarf binaries |
| topic | Neutron stars Compact binary stars Gravitational waves |
| url | https://doi.org/10.3847/1538-4357/adc0fd |
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