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NGC 300 ULX1: A test case for accretion torque theory.
- Source :
-
Astronomy & Astrophysics / Astronomie et Astrophysique . Dec2018, Vol. 620, pN.PAG-N.PAG. 10p. - Publication Year :
- 2018
-
Abstract
- NGC 300 ULX1 is a newly identified ultra-luminous X-ray pulsar. The system is associated with the supernova impostor SN 2010da that was later classified as a possible supergiant Be X-ray binary. In this work we report on the spin period evolution of the neutron star based on all the currently available X-ray observations of the system. We argue that the X-ray luminosity of the system has remained almost constant since 2010, at a level above ten times the Eddington limit. Moreover, we find evidence that the spin period of the neutron star evolved from ∼126 s down to ∼18 s within a period of about 4 years. We explain this unprecedented spin evolution in terms of the standard accretion torque theory. An intriguing consequence for NGC 300 ULX1 is that a neutron star spin reversal should have occurred a few years after the SN 2010da event. [ABSTRACT FROM AUTHOR]
- Subjects :
- *X-rays
*LUMINOSITY
*EDDINGTON mass limit
*GALAXIES
*ASTROPHYSICS
Subjects
Details
- Language :
- English
- ISSN :
- 00046361
- Volume :
- 620
- Database :
- Academic Search Index
- Journal :
- Astronomy & Astrophysics / Astronomie et Astrophysique
- Publication Type :
- Academic Journal
- Accession number :
- 133735642
- Full Text :
- https://doi.org/10.1051/0004-6361/201833442