Broadband Constraints on the Nature of NGC5055 ULX1
Abstract
The ultraluminous X-ray source population is now broadly expectedto be dominated by super-Eddington accretors, thanks to the broadbandspectroscopy provided by XMM and NuSTAR in combination, the detection ofX-ray pulsations from a growing subset of ULXs (unambiguously confirmingthem as super-Eddington neutron stars) and the detection of powerfuloutflows from a handful of systems. NGC5055 ULX1 is an extreme ULX(L(X,peak) ~ 1e40 erg/s) that has received very little observationalattention to date. Here, we proposal a deep, coordinated XMM+NuSTARobservation (130+150ks exposures, respectively) in order to constrainits broadband spectrum, search for pulsations, and atomic outflowsignatures. These observations will provide the first robust constraintson the nature of this extreme binary
- Publication:
-
XMM-Newton Proposal
- Pub Date:
- October 2020
- Bibcode:
- 2020xmm..prop..181W