J 2012

Mass-angular-momentum relations implied by models of twin peak quasi-periodic oscillations

BAKALA, Pavel, Kateřina GOLUCHOVÁ, Zdeněk STUCHLÍK, Eva ŠRÁMKOVÁ, Gabriel TÖRÖK et. al.

Basic information

Original name

Mass-angular-momentum relations implied by models of twin peak quasi-periodic oscillations

Authors

Edition

Astrophysical Journal, GB - Spojené království Velké Británie a, 2012, 0004-637X

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

Organization unit

Faculty of Philosophy and Science in Opava

DOI

UT WoS

000311217000042

Keywords in English

Stars: neutron; X-rays: binaries

Tags

Tags

International impact, Reviewed

Links

GA202/09/0772, research and development project. GPP209/12/P740, research and development project. LC06014, research and development project. MSM4781305903, plan (intention).
Změněno: 27/4/2021 09:45, Jan Vlha

Abstract

V originále

Twin peak quasi-periodic oscillations (QPOs) appear in the X-ray power-density spectra of several accreting low-mass neutron star (NS) binaries. Observations of the peculiar Z-source Circinus X-1 display unusually low QPO frequencies. Using these observations, we have previously considered the relativistic precession (RP) twin peak QPO model to estimate the mass of the central NS in Circinus X-1. We have shown that such an estimate results in a specific mass-angular-momentum (M - j) relation rather thana single preferred combination of M and j. Here we confront our previous results with another binary, the atoll source 4U 1636-53 that displays the twin peak QPOs at very high frequencies, and extend the consideration to various twin peak QPO models. Inanalogy to the RP model, we find that these imply their own specific M - j relations. We explore these relations for both sources and note differences in the ? 2 behavior that represent a dichotomy between high- and low-frequency sources