The unusual supernova remnant surrounding the ultraluminous X-ray source IC 342 X-1

Details The unusual supernova remnant surrounding the ultraluminous X-ray source IC 342 X-1 The unusual supernova remnant surrounding the ultraluminous X-ray source IC 342 X-1

2003-03-05

arxiv.org/abs/astro-ph/0303110v1

Mon.Not.Roy.Astron.Soc. 342 (2003) 709

Astronomy and Astrophysics

Astrophysics

6 pages, 3 figures (3rd in colour), accepted for publication in MNRAS

Scientific paper

10.1046/j.1365-8711.2003.06593.x

We report the results of an observation of a large diameter (110 pc) supernova remnant (SNR) found to encircle the position of the ultraluminous X-ray source (ULX) IC 342 X-1. The inferred initial energy input to the SNR is at least 2 -- 3 times greater than the canonical energy for an ``ordinary'' supernova remnant. Two regions on the inside of the shell are bright in [O III] lambda5007 emission, possibly as the result of X-ray photoionization by the ULX. If this is the case, then the morphology of this nebulosity implies that the X-ray emission from the ULX is anisotropic. The presence of the ULX, most probably a black hole X-ray binary, within an unusually energetic supernova remnant suggests that we may be observing the aftermath of a gamma-ray burst, though other origins for the energetic nebula are discussed.

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