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Resolving dichotomy in compact objects through continuous gravitational waves observation

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dc.abstract.enMore than two dozen soft gamma-ray repeaters (SGRs) and anomalous X-ray pulsars (AXPs) have been detected so far. These are isolated compact objects. Many of them are either found to be associated with supernova remnants or their surface magnetic fields are directly measured, confirming that they are neutron stars (NSs). However, it has been argued that some SGRs and AXPs are highly magnetized white dwarfs (WDs). Meanwhile, the existence of super-Chandrasekhar WDs has remained to be a puzzle. However, not even a single such massive WD has been observed directly. Moreover, some WD pulsars are detected in electromagnetic surveys and some of their masses are still not confirmed. Here, we calculate the signal-to-noise ratio for all these objects, considering different magnetic field configurations and thereby estimate the required time for their detection by various gravitational wave (GW) detectors. For SGRs and AXPs, we show that, if these are NSs, they can hardly be detected by any of the GW detectors, while if they are WDs, big bang Observer (BBO), DECi-hertz Interferometer Gravitational wave Observatory (DECIGO) and Advanced Laser Interferometer Antenna (ALIA) would be able to detect them within a few days to a year of integration, depending on the magnetic field strength and its configuration. Similarly, if a super-Chandrasekhar WD has a dominant toroidal field, we show that even Laser Interferometer Space Antenna (LISA) and TianQin would be able to detect it within one year of integration. We also discuss how GWs can confirm the masses of the WD pulsars.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorKalita, Surajit
dc.contributor.authorMondal, Tushar
dc.contributor.authorTout, Christopher A.
dc.contributor.authorBulik, Tomasz
dc.contributor.authorMukhopadhyay, Banibrata
dc.date.accessioned2024-01-25T19:13:58Z
dc.date.available2024-01-25T19:13:58Z
dc.date.copyright2021-09-13
dc.date.issued2021
dc.description.accesstimeBEFORE_PUBLICATION
dc.description.financePublikacja bezkosztowa
dc.description.number1
dc.description.versionORIGINAL_AUTHOR
dc.description.volume508
dc.identifier.doi10.1093/MNRAS/STAB2625
dc.identifier.issn0035-8711
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/118479
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2021MNRAS.508..842K
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.relation.pages842-851
dc.rightsOther
dc.sciencecloudnosend
dc.titleResolving dichotomy in compact objects through continuous gravitational waves observation
dc.typeJournalArticle
dspace.entity.typePublication