Spectroscopic Study of the ULX-Pulsar NGC 7793 P13
Abstract
We will re-analyze the archived data of NGC 7793 P13 obtained with the ESO-VLT telescope in 2009-2011. The spectra contain a bright HeII ?4686 emission line, the nature of the variability of which indicates that it is formed in a supercritical accretion disk. We are constructing a radial velocity curve of this line, an analysis of which, together with data from the literature, allowed us to obtain the following system parameters: the semi-amplitude of the radial velocity of the accretor is 48 ? 10kms"1, the donor mass function is 0.738 M, and the orbit inclination is 20.3 ? 1?%
- Publication:
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Azerbaijani Astronomical Journal
- Pub Date:
- December 2020
- Bibcode:
- 2020AzAJ...15b.169N
- Keywords:
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- ULX-pulsar;
- X-ray binaries;
- Radial velocity;
- Accretion;
- NGC 7793 P13