Synergies of THESEUS with the large facilities of the 2030s and guest observer opportunities

Rosati, P.; Basa, S.; Blain, A. W.; Bozzo, E.; Branchesi, M.; Christensen, L.; Ferrara, A.; Gomboc, A.; O'Brien, P. T.; Osborne, J. P.; Rossi, A.; Schüssler, F.; Spurio, M.; Stergioulas, N.; Stratta, G.; Amati, L.; Casewell, S.; Ciolfi, R.; Ghirlanda, G.; Grimm, S.; Guetta, D.; Harms, J.; Floc'h, E. Le; Longo, F.; Maggiore, M.; Mereghetti, S.; Oganesyan, G.; Salvaterra, R.; Tanvir, N. R.; Turriziani, S.; Vergani, S. D.; Balman, S.; Caruana, J.; Erkut, M. H.; Guidorzi, G.; Frontera, F.; Martin-Carrillo, A.; Paltani, S.; Porquet, D.; Sergijenko, O.

doi:10.48550/arxiv.2104.09535

Cited by 2 publications

(3 citation statements)

References 69 publications

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“…The description of post-merger remnants as quasi-equilibrium models has applications in the interpretation of the post-merger GW spectrum; in the study of the threshold mass to prompt collapse; in the construction of universal or empirical relations between properties of the remnants and properties of nonrotating models; and in modeling of processes taking place on longer timescales that are relevant for multi-messenger follow-up studies of GW detections (Ciolfi et al 2021;Rosati et al 2021). We plan to elaborate further on these aspects in future work.…”

Section: Discussion and Outlookmentioning

confidence: 99%

Models of binary neutron star remnants with tabulated equations of state

Iosif,

Stergioulas

2021

Preprint

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The emergence of novel differential rotation laws that can reproduce the rotational profile of binary neutron star merger remnants has opened the way for the construction of equilibrium models with properties that resemble those of remnants in numerical simulations. We construct models of merger remnants, using the 4-parameter differential rotation law by Uryū et al. (2017) and three tabulated, zero-temperature equations of state. The models have angular momenta that are determined by empirical relations, constructed through numerical simulations. After a systematic exploration of the parameter space of merger remnant equilibrium sequences, which includes the determination of turning points along constant-angular-momentum sequences, we find that a particular rotation law can reproduce the threshold mass to prompt collapse to a black hole with a relative difference of only ∼ 1% with respect to numerical simulations, in all cases considered. Furthermore, our results indicate a possible correlation between the compactness of equilibrium models of remnants at the threshold mass and the compactness of maximum-mass nonrotating models. Another key prediction of binary neutron star merger simulations is a relatively slowly rotating inner region, where the angular velocity Ω (as measured by an observer at infinity) is mostly due to the frame dragging angular velocity 𝜔. In our investigation of the parameter space of the Uryu+ rotation law, we naturally find quasi-spherical (Type A) remnant models with this property. Our investigation clarifies the impact of the differential rotation law and of the equation of state on key properties of binary neutron star remnants and lays the groundwork for including thermal effects in future studies.

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Section: Discussion and Outlookmentioning

confidence: 99%

Models of binary neutron star remnants with tabulated equations of state

Iosif,

Stergioulas

2021

Preprint

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“…Figure 3 provides a tentative timeline of these observatories with respect to the THESEUS expected operational period. From ELT to ATHENA, CTA to Einstein Telescope, the Vera Rubin Observatory to the Roman Space Telescope, the science returns from combining observations with multiple facilities is a classic case of "the whole being much greater than the sum of the parts" [26]. A broad range of other science programmes will be enabled by THESEUS, including using observations of GRB emission as laboratories of ultra-relativistic matter and, e.g., for testing Lorentz invariance [5], as well as gathering statistics on large populations of other high-energy sources and transients [27].…”

Section: The Theseus Mission Conceptmentioning

confidence: 99%

“…In Figure 6 we plot the gaussian probability distributions of the current estimates of H 0 and the expected improvement of the GW170817 distribution by assuming a realistic number of 20 joint detected events (Table 2). THESEUS will disseminate accurate sky localization (arcmin/arcsecond uncertainties) within seconds/minutes to the astronomical community, thus enabling large ground and space-based telescopes available by the end of 2030s to observe and deeply characterise the nature of large sample of multi-messenger sources [26,38]. Figure 2 illustrates the main large multi-wavelength and multi-messenger facilities expected to operate in synergy with THESEUS and Figure 3 shows the planned timeline.…”

Section: Multi-messenger Astrophysics With Theseusmentioning

confidence: 99%

Breakthrough Multi-Messenger Astrophysics with the THESEUS Space Mission

et al. 2022

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The mission concept THESEUS (Transient High Energy Sky and Early Universe Surveyor) aims at exploiting Gamma-Ray Bursts (GRB) to explore the early Universe, as well as becoming a cornerstone of multi-messenger and time-domain astrophysics. To achieve these goals, a key feature is the capability to survey the soft X-ray transient sky and to detect the faint and soft GRB population so far poorly explored. Among the expected transients there will be high-redshift GRBs, nearby low-luminosity, X-ray Flashes and short GRBs. Our understanding of the physics governing the GRB prompt emission will benefit from the 0.3 keV–10 MeV simultaneous observations for an unprecedented large number of hundreds of events per year. In particular the mission will provide the identification, accurate sky localisation and characterization of electromagnetic counterparts to sources of gravitational wave and neutrino sources, which will be routinely detected during the 2030s by the upgraded second generation and third generation Gravitational Wave (GW) interferometers and next generation neutrino detectors.

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Synergies of THESEUS with the large facilities of the 2030s and guest observer opportunities

Cited by 2 publications

References 69 publications

Models of binary neutron star remnants with tabulated equations of state

Models of binary neutron star remnants with tabulated equations of state

Breakthrough Multi-Messenger Astrophysics with the THESEUS Space Mission

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