Talk detail

Participant	varniere, Peggy
Institution	APC - 10, rue Alice Domon et Léonie Duquet - Paris - France - France

Session	AC1	Accepted	Yes	Order	7	Time	18:00	20'
Talk	Oral abstract	Title	GR SIMULATIONS OF THE RWI: WHAT IMPACTS HFQPOS OBSERVABLES
Coauthors	Varniere, P., Casse, F., Vincent, F.H.
Abstract	The rather elusive High-Frequency Quasi-Periodic Oscillations(HFQPO) observed in the X-ray lightcurve of black hole have been seen in a wide range of frequencies, even within one source. It is also notable to have been detected in ‘pairs’ of HFQPOs with a close to integer ratio between the frequencies. Using the newly developed GRAMRVAC code able to follow the evolution of the RWI in the Kerr metric we explore how observables such as the rms amplitude and the different flavor of HFQPO ratio from the RWI would relates to the spin of the black hole or the condition in the disk and if those conditions are compatible with the observations.
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Session	AC1	Accepted	Yes	Order	99	Time
Talk	Poster abstract	Title	Disk spectrum evolution as function of spin, impact on model fitting.
Coauthors	Varniere, P. Vincent, F.H., Casse, F.
Abstract	With NICER up and running and the ATHENA mission in preparation there is need to study into more details what is the influence, if any, of the spin on the observed spectrum. Using the newly developed NOVAs framework which comprise of a GR code GRAMRVAC coupled with the ray-tracing GR code gyoto, we computed a series of simulated disk spectrum for a variety of black-hole spin. Using standard models from xspec we fitted those spectrum and look how they performed to give us the parameter of the simulated spectrum. Here we report on our finding and how we could improve the existing models to get better insight in the physical large scale disk parameters.
Pdf file

Session	AC1	Accepted	Yes	Order	99	Time
Talk	Poster abstract	Title	NOVAs: a Numerical Observatory of Violent Accreting systems
Coauthors	Varniere, P., Casse, F., Vincent, F.H.
Abstract	Here we are presenting NOVAs, a Numerical Observatory of Violent Accreting systems, which couples a GR AMR MPI (GRAMRVAC) code able to follow accretion around a Kerr Black-hole with the ray-tracing code GYOTO. Together, they allow us to test different models by running the simulation and obtaining spectral energy distribution and power-density spectrum from which we can extract the same observables as in for 'real' observations, hence making it a Numerical Observatory.
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