Speaker
Ms
Marta Dziełak
(Nicolaus Copernicus Astronomical Center PAS)
Description
We probe models of disc truncation in the hard spectral state of an outburst of the X-ray transient GX 339-4. We test a large number of different models of disc reflection and its relativistic broadening, using two independent sets of codes. We apply it to a Rossi X-ray Timing Explorer spectrum in the rising part of the hard state. Our statistically best model has a physical thermal Comptonization primary continuum, requires the disc to be truncated at a radius larger than or equal to about two ISCO radii for the maximum dimensionless spin, and predicts a disc inclination in agreement with that of the binary. A paper presenting our results has been published in MNRAS (arXiv:1811.09145).
| Affiliation | Nicolaus Copernicus Astronomical Center PAS |
|---|
Primary author
Ms
Marta Dziełak
(Nicolaus Copernicus Astronomical Center PAS)
Co-authors
Prof.
Andrzej Zdziarski
(Nicolaus Copernicus Astronomical Center PAS)
Dr
Michał Szanecki
(Nicolaus Copernicus Astronomical Center PAS)
Dr
Barbara De Marco
(Nicolaus Copernicus Astronomical Center PAS)
Andrzej Niedźwiecki
(Łódź University)
Alex Markowitz
(Nicolaus Copernicus Astronomical Center PAS, University of California)
