SIMBAD references

2014MNRAS.444..642M - Mon. Not. R. Astron. Soc., 444, 642-650 (2014/October-2)

Spectral state transitions of the Ultraluminous X-ray Source IC 342 X-1.

MARLOWE H., KAARET P., LANG C., FENG H., GRISE F., MILLER N., CSEH D., CORBEL S. and MUSHOTZKY R.F.

Abstract (from CDS):

We observed the Ultraluminous X-ray Source (ULX) IC 342 X-1 simultaneously in X-ray and radio with Chandra and the JVLA to investigate previously reported unresolved radio emission coincident with the ULX. The Chandra data reveal a spectrum that is much softer than observed previously and is well modelled by a thermal accretion disc spectrum. No significant radio emission above the rms noise level was observed within the region of the ULX, consistent with the interpretation as a thermal state though other states cannot be entirely ruled out with the current data. We estimate the mass of the black hole using the modelled inner disc temperature to be 30  M_☉ \lesssim Msqrt(cosi)\lesssim 200  M_☉ based on a Shakura-Sunyaev disc model. Through a study of the hardness and high-energy curvature of available X-ray observations, we find that the accretion state of X-1 is not determined by luminosity alone.

Abstract Copyright: © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2014)

Journal keyword(s): accretion, accretion discs - black hole physics - radio continuum: general - X-rays: binaries

Simbad objects: 8

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2020.10.01-00:11:35

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