High Density Reflection Spectroscopy I. A case study of GX~339-4

Abstract

We present a broad band spectral analysis of the black hole binary GX~339-4 with NuSTAR and Swift using high density reflection model. The observations were taken when the source was in low flux hard states (LF) during the outbursts in 2013 and 2015, and in a very high flux soft state (HF) in 2015. The high density reflection model can explain its LF spectra with no requirement for an additional low temperature thermal component. This model enables us to constrain the density in the disc surface of GX~339-4 in different flux states. The disc density in the LF state is $\log (n_{\mathrm{e}}/$ cm${}^{-3})\approx 21$, 100 times higher than the density in the HF state ($\log (n_{\mathrm{e}}/$ cm${}^{-3})=18.93_{-0.16}^{+0.12}$). A close-to-solar iron abundance is obtained by modelling the LF and HF broad band spectra with variable density reflection model ($Z_{\mathrm{Fe}}=1.50_{-0.04}^{+0.12}{Z}_{\odot }$ and $Z_{\mathrm{Fe}}=1.05_{-0.15}^{+0.17}{Z}_{\odot }$ respectively).

Accepted by MNRAS

References in corpus (9)

• Advection-Dominated Accretion and the Black Hole Event Horizon
• A Long, Hard Look at the Low-Hard State in Accreting Black Holes
• A systematic look at the Very High and Low/Hard state of GX 339-4: Constraining the black hole spin with a new reflection model
• The NuSTAR spectrum of Mrk 335: Extreme relativistic effects within 2 gravitational radii of the event horizon?
• X-ray reflection in accreting stellar-mass black hole systems
• On the masses and evolutionary status of the black hole binary GX 339-4. A twin system of XTE J1550-564?
• The mass function of GX 339-4 from spectroscopic observations of its donor star
• Initial Measurements of Black Hole Spin in GX 339-4 from Suzaku Spectroscopy
• Modelling the Extreme X-ray Spectrum of IRAS 13224-3809

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