Mass of the active galactic nucleus black hole XMMUJ134736.6+173403

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19240%2F19%3AA0000426" target="_blank" >RIV/47813059:19240/19:A0000426 - isvavai.cz</a>
Result on the web
<a href="https://www.aanda.org/articles/aa/abs/2019/02/aa34774-18/aa34774-18.html" target="_blank" >https://www.aanda.org/articles/aa/abs/2019/02/aa34774-18/aa34774-18.html</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/0004-6361/201834774" target="_blank" >10.1051/0004-6361/201834774</a>

Result language
angličtina
Original language name
Mass of the active galactic nucleus black hole XMMUJ134736.6+173403
Original language description
A recent study of the X-ray source XMMUJ134736.6+173403 has revealed a strong quasi-periodic modulation in the X-ray flux. The observation of two quasiperiodic oscillations (QPOs) that occur on a daily timescale and exhibit a 3:1 frequency ratio strongly supports the evidence for the presence of an active galactic nucleus black hole (AGN BH). Assuming an orbital origin of QPOs, we calculated the upper and lower limit on AGN BH mass M and found M approximate to 10^(7)-10^(9) M_Sun. When we compare this to mass estimates of other sources, XMMUJ134736.6+173403 appears to be the most massive source with commensurable QPO frequencies, and its mass represents the current observational upper limit on AGN BH mass based on QPO observations. We note that it will be crucial for the falsification of particular resonance models of QPOs whether only a single QPO with a frequency that completes the harmonic sequence 3:2:1 is found in this source, or if a new different pair of QPOs with frequencies in the 3: 2 ratio is found. The former case would agree with the prediction of the 3:2 epicyclic resonance model and BH mass M approximate to (5a^(2) + 8a + 8) x 10^(7) M_Sun, where a is a dimensionless BH spin.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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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
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>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

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