Unveiling the fastest Pulsating ULXs
Abstract
The recent discovery of a handfuln of ULXs showing pulsations (PULXs)unambiguously associated them to neutron stars (NSs) exceeding up to about500 times their L_Edd. During AO17 we were awarded a LP aimed at searchingfor new PULXs within 8 fields containing promising candidates. So far weobtained data for half of sample and we discovered one new PULX. Thisresult confirms the goodness of the LP adopted strategy and that arelatively large fraction of ULXs likely hosts an accreting NS. Thepresent proposal is aimed at observing two bright (high flux) ULXs inTiming mode and at looking for coherent signals over a period range(1ms<P<100ms). The detection of even one very fast PULX would be veryimportant for constraining NS accretion models as well as binary systems.
- Publication:
-
XMM-Newton Proposal
- Pub Date:
- October 2018
- Bibcode:
- 2018xmm..prop..115I