J 2023

Timing of accreting neutron stars with future X-ray instruments: towards new constraints on dense matter equation of state

KARAS, Vladimír, Kateřina KLIMOVIČOVÁ, Debora LANČOVÁ, M. STOLC, J. SVOBODA et. al.

Základní údaje

Originální název

Timing of accreting neutron stars with future X-ray instruments: towards new constraints on dense matter equation of state

Autoři

KARAS, Vladimír (203 Česká republika), Kateřina KLIMOVIČOVÁ (203 Česká republika, domácí), Debora LANČOVÁ (203 Česká republika, domácí), M. STOLC, J. SVOBODA, Gabriel TÖRÖK (203 Česká republika, domácí), Monika MATUSZKOVÁ (203 Česká republika, domácí), Eva ŠRÁMKOVÁ (203 Česká republika, domácí), René ŠPRŇA (203 Česká republika, domácí) a Martin URBANEC (203 Česká republika, domácí)

Vydání

CONTRIBUTIONS OF THE ASTRONOMICAL OBSERVATORY SKALNATE PLESO, 2023, 1335-1842

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10308 Astronomy

Stát vydavatele

Slovensko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

Kód RIV

RIV/47813059:19630/23:A0000268

Organizační jednotka

Fyzikální ústav v Opavě

UT WoS

001141834600007

Klíčová slova anglicky

stars;black holes;neutron;X-rays;binaries;polarimetry

Štítky

Příznaky

Mezinárodní význam, Recenzováno

Návaznosti

GX21-06825X, projekt VaV.
Změněno: 26. 2. 2024 14:50, Mgr. Pavlína Jalůvková

Anotace

V originále

The Enhanced X-ray Timing and Polarimetry (eXTP) mission is a space mission to be launched in the late 2020s that is currently in development led by China in international collaboration with European partners. Here we provide a progress report on the Czech contribution to the eXTP science. We report on our simulation results performed in Opava (Institute of Physics of the Silesian University in Opava) and Prague (Astronomical Institute of the Czech Academy of Sciences), where the advanced timing capabilities of the satellite have been assessed for bright X-ray binaries that contain an accreting neutron star (NS) and exhibit the quasi-periodic oscillations. Both stellar-mass, supermassive, and tentative intermediate-mass black holes can be included in the program portfolio. Measurements of X-ray variability originating in oscillations of fluid in the innermost parts of the accretion region determined by general relativity, such as the radial or Lense-Thirring precession, can serve for sensitive tests enabling us to distinguish between the signatures of different viable dense matter equations of state. We have developed formulae describing non-geodesic oscillations of accreted fluid and their simplified practical forms that allow for an expeditious application of the universal relations determining the NS properties. These relations, along with our software tools for studying the propagation of light in strong gravity and neutron star models, can be used for precise modeling of the X-ray variability while focusing on properties of the intended Large Area Detector (LAD). We update the status of our program and set up an electronic repository that will provide simulation results and gradual updates as the mission specifications progress toward their final formulation.