| Full text | |
| Author(s): |
Ghoreyshi, M. R.
;
Jones, C. E.
;
Carciofi, A. C.
;
Kolka, I
;
Aret, A.
;
Eenmaee, T.
;
Neito, R.
Total Authors: 7
|
| Document type: | Journal article |
| Source: | Monthly Notices of the Royal Astronomical Society; v. 533, n. 3, p. 9-pg., 2024-08-30. |
| Abstract | |
The viscous decretion disc (VDD) scenario has been used to model the observables of the Be stars. Its capability to predict individual observables has been confirmed for several Be stars. Here, we simultaneously analyse the spectroscopic and BVI-band photometric data for the Be star MT91-213 with the Monte Carlo radiative-transfer code hdust to determine the stellar parameters, geometry, and physical conditions for its circumstellar disc. MT91-213 is the primary component of a binary system whose companion is the pulsar PSR J2032+4127. We find that the VDD model can simultaneously reproduce the multiple observables qualitatively, but not quantitatively. We determine the mass of the primary star to be 13.1 M-circle dot which is smaller than reported in the literature. We present a dynamical scenario for the evolving disc density from a diffuse to a dense phase. Also, we determine that the inclination of the disc is about 40 degrees which means it is 20(degrees) tilted from the orbit of the secondary star. Our results indicate that the mass loss rate for MT91-213 is similar to 10(-7) to 10(-6)M(circle dot)yr(-1) which is in agreement with the suggested values in the literature, required to explain the observed X-ray synchrotron luminosity, Lx, for PSR J2032+4127. (AU) | |
| FAPESP's process: | 18/04055-8 - High precision spectroscopy: from the first stars to planets |
| Grantee: | Jorge Luis Melendez Moreno |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 19/13354-1 - Decretion disks and outflows around fast-spinning stars |
| Grantee: | Alex Cavaliéri Carciofi |
| Support Opportunities: | Regular Research Grants |