Effects of adiabatic index on the sonic surface and time variability of low angular momentum accretion flows

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F19%3A00518648" target="_blank" >RIV/67985815:_____/19:00518648 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1093/mnras/stz1296" target="_blank" >https://doi.org/10.1093/mnras/stz1296</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/mnras/stz1296" target="_blank" >10.1093/mnras/stz1296</a>

Result language

angličtina

Original language name

Effects of adiabatic index on the sonic surface and time variability of low angular momentum accretion flows

Original language description

We study the role of adiabatic index in determining the critical points in the transonic low angular momentum accretion flow on to a black hole. We present the general relativistic 2D hydrodynamic simulations of axisymmetric, inviscid accretion flows in a fixed Kerr black hole gravitational field. Arelativistic fluidwhere its bulk velocity is comparable to the speed of light, flowing in the accretion disc very close to the horizon can be described by an adiabatic index of 4/3 < gamma < 5/3. The time-dependent evolution of the shock position and respective effects on mass accretion rate and oscillation frequency with varying adiabatic index is discussed in the context of the observed microquasars.

Czech name

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Czech description

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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

<a href="/en/project/GJ17-06962Y" target="_blank" >GJ17-06962Y: Non-linear phenomena in a multi-channel astronomy of black holes</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

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

Name of the periodical

Monthly Notices of the Royal Astronomical Society

ISSN

1365-2966

e-ISSN

—

Volume of the periodical

487

Issue of the periodical within the volume

1

Country of publishing house

GB - UNITED KINGDOM

Number of pages

14

Pages from-to

755-768

UT code for WoS article

000474907100057

EID of the result in the Scopus database

2-s2.0-85071149629