SIMBAD references

2003MNRAS.345..639P - Mon. Not. R. Astron. Soc., 345, 639-649 (2003/October-3)

XMM-Newton RGS spectroscopy of LMC X-3.


Abstract (from CDS):

We present soft X-ray spectroscopy of the black hole binary LMC X-3 from the XMM-Newton Reflection Grating Spectrometer. The observations span the full range of spectral states seen in LMC X-3. The spectra are completely dominated by continuum emission, and the neutral absorbing column measured from the Oi edge (NH3.8+0.8–0.7x 1020 cm–2) is consistent with the Galactic interstellar column density towards LMC X-3. We find no evidence for variability of the neutral absorbing column. We also constrain the ionized column density using the upper limits to the equivalent width of the OII-OVIII K-shell resonance lines: we find that the equivalent hydrogen column density of gas in which O is partially ionized is < 8x 1020 cm–2. From this upper limit we can rule out a line-driven stellar wind as the power source for the X-ray emission of LMC X-3 except when it is faint. At wavelengths longward of the peak emission the spectral shape is well described by a multitemperature disc-blackbody spectrum; the power-law component, which dominates at shorter wavelengths, does not continue longward of the disc-blackbody peak. This implies that the multitemperature disc-blackbody component supplies the seed photons that are Compton upscattered in the hot corona, consistent with the standard paradigm for black hole X-ray binary spectral states.

Abstract Copyright: 2003 RAS

Journal keyword(s): accretion, accretion discs - black hole physics - binaries: general - stars: early-type - stars: winds, outflows - galaxies: Seyfert

Simbad objects: 6

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