Výsledky vyhledávání - "Earnshaw, P. M."

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Soft Extragalactic X-Ray Binaries at the Eddington Threshold

Autor: Earnshaw, Hannah M., Roberts, Timothy P.

The luminosity range at and just below the 10^39 erg/s cut-off for defining ultraluminous X-ray sources (ULXs) is a little-explored regime. It none-the-less hosts a large number of X-ray sources, and has great potential for improving our understandin

Externí odkaz: http://arxiv.org/abs/1702.00313

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A variable ULX and possible IMBH candidate in M51a

Autor: Earnshaw, Hannah M., Roberts, Timothy P., Heil, Lucy M., Mezcua, Mar, Walton, Dominic J., Done, Chris, Harrison, Fiona A., Lansbury, George B., Middleton, Matthew J., Sutton, Andrew D.

ULX-7, in the northern spiral arm of M51, demonstrates unusual behaviour for an ultraluminous X-ray source, with a hard X-ray spectrum but very high short-term variability. This suggests that it is not in a typical ultraluminous state. We analyse the

Externí odkaz: http://arxiv.org/abs/1512.04825

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An Intermediate-Mass Black Hole Candidate in M51?

Autor: Earnshaw, H. M.

We present the current results of an investigation into M51 ULX-7, using archival data from XMM-Newton, Chandra and NuSTAR, and optical and radio data from HST and VLA. The source has a consistently hard power-law X-ray spectrum and high short-term v

Externí odkaz: http://arxiv.org/abs/1510.02277

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