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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19240%2F12%3A%230004565" target="_blank" >RIV/47813059:19240/12:#0004565 - isvavai.cz</a>

Výsledek na webu

<a href="http://iopscience.iop.org/0004-637X/760/2/138/pdf/0004-637X_760_2_138.pdf" target="_blank" >http://iopscience.iop.org/0004-637X/760/2/138/pdf/0004-637X_760_2_138.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/0004-637X/760/2/138" target="_blank" >10.1088/0004-637X/760/2/138</a>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

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

Popis výsledku anglicky

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

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BN - Astronomie a nebeská mechanika, astrofyzika

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2012

Kód důvěrnosti údajů

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

Název periodika

Astrophysical Journal

ISSN

0004-637X

e-ISSN

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Svazek periodika

760

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

15

Strana od-do

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Kód UT WoS článku

000311217000042

EID výsledku v databázi Scopus

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