Stochastic dynamical description of κ and ρ bursting classes of the microquasar GRS 1915+105
| العنوان: | Stochastic dynamical description of κ and ρ bursting classes of the microquasar GRS 1915+105 |
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| المؤلفون: | Tommaso Alberti, Enrico Massaro, Teresa Mineo, Marco Feroci |
| المصدر: | Monthly Notices of the Royal Astronomical Society. 517:3568-3578 |
| بيانات النشر: | Oxford University Press (OUP), 2022. |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | Space and Planetary Science, Astronomy and Astrophysics |
| الوصف: | We applied a stochastic analysis based on the Langevin equation to some bursting X-ray light curves of the bright microquasar GRS 1915+105. These time series, obtained with the PCA instrument onboard Rossi-XTE, are typical of the ρ and κ classes, which are characterized by several recurring bursts with different profiles and recurrence times. We computed the state functions which are able to capture the main dynamical properties of these light curves. In the case of the κ class, the state functions in four energy bands have a double-well structure (two stable states with an unstable one in between) and the system oscillates from one to the other minimum describing a typical hysteresis cycle, as in the case of a stochastic resonance under a forcing input. For the ρ class, the functions have only one stable state followed by an unstable interval, and the system describes a limit cycle. We also performed a new spectral analysis of these data with a multitemperature zero torque accretion disc model and used the resulting parameters for interpreting the main properties of the stochastic description. |
| تدمد: | 1365-2966 0035-8711 |
| DOI: | 10.1093/mnras/stac2912 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::a09370070469de346c275c74a1c18d82 https://doi.org/10.1093/mnras/stac2912 |
| Rights: | EMBARGO |
| رقم الانضمام: | edsair.doi...........a09370070469de346c275c74a1c18d82 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 13652966 00358711 |
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| DOI: | 10.1093/mnras/stac2912 |