NGC 300 ULX1: spin evolution, super-Eddington accretion, and outflows
Abstract
NGC 300 ULX1 is an ultraluminous X-ray pulsar, showing an unprecedented spin evolution, from about 126 s to less than 20 s in only 4 yr, consistent with steady mass accretion rate. Following its discovery we have been monitoring the system with Swift and NICER to further study its properties. We found that even though the observed flux of the system dropped by a factor of ≳20, the spin-up rate remained almost constant. A possible explanation is that the decrease in the observed flux is a result of increased absorption of obscuring material due to outflows or a precessing accretion disc.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Aug 05, 2019
- Source ID
- 10.1093/mnras/stz2045
Entities
People
- C B Bailyn
- F Koliopanos
- F. Haberl
- Georgios Vasilopoulos
- Keith C. Gendreau
- Maria Petropoulou
- Paul S Ray
Organizations
- Goddard Space Flight Center
- Max Planck Institute for Extraterrestrial Physics
- National Aeronautics and Space Administration
- Princeton University
- Research Institute in Astrophysics and Planetology
- United States Naval Research Laboratory
- Yale University