Oscillations of fluid tori around neutron stars

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F23%3A00574435" target="_blank" >RIV/67985815:_____/23:00574435 - isvavai.cz</a>

Alternative codes found

RIV/47813059:19630/23:A0000255

Result on the web

<a href="https://doi.org/10.1002/asna.20220114" target="_blank" >https://doi.org/10.1002/asna.20220114</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/asna.20220114" target="_blank" >10.1002/asna.20220114</a>

Result language

angličtina

Original language name

Oscillations of fluid tori around neutron stars

Original language description

We examine the influence of quadrupole moment of a slowly rotating neutron star (NS) on the oscillations of a fluid accretion disk (torus) orbiting a compact object the spacetime around which is described by the Hartle-Thorne geometry. Explicit formulae for non-geodesic orbital epicyclic and precession frequencies, as well as their simplified practical versions that allow for an expeditious application of the universal relations determining the NS properties, are obtained and examined. We demonstrate that the difference in the accretion disk precession frequencies for NSs of the same mass and angular momentum, but different oblateness, can reach up to tens of percent. Even higher differences can arise when NSs with the same mass and rotational frequency, but different equations of state (EoS), are considered. In particular, the Lense-Thirring precession frequency defined in the innermost parts of the accretion region can differ by more than one order of magnitude across NSs with different EoS. Our results have clear implications for models of the LMXBs variability.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Astronomische Nachrichten

ISSN

0004-6337

e-ISSN

1521-3994

Volume of the periodical

344

Issue of the periodical within the volume

1-2

Country of publishing house

US - UNITED STATES

Number of pages

4

Pages from-to

e20220114

UT code for WoS article

000903882300001

EID of the result in the Scopus database

2-s2.0-85145047752