On `The spectral and temporal properties of an Ultra--Luminous X-ray source in NGC 6946', by Senorita Devi et al
| dc.creator | King, A. R. | |
| dc.date | 2008-04-23 | |
| dc.date.accessioned | 2026-07-07T09:34:18Z | |
| dc.date.available | 2026-07-07T09:34:18Z | |
| dc.description | A recent paper (arXiv:0804.3463) claims that the presence of a soft X-ray component in an X-ray source in NGC 6946 provides strong evidence that its black hole mass is definitely $>100\msun$, and more probably $\sim 400\msun$, even if the source is beamed. I show that the data are instead very compatible with a black hole mass of only $5\msun$, radiating isotropically (i.e. no beaming) and a mass transfer rate about 60 times the Eddington value, i.e. $1.25 \times 10^{-5} \msun {\rm yr}^{-1}$. Such a system is very similar to the probable descendant of the Galactic X-ray binary Cygnus X--1 once the supergiant companion evolves to fill its Roche lobe. | |
| dc.identifier | https://arxiv.org/abs/0804.3760 | |
| dc.identifier | http://arxiv.org/abs/0804.3760 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/159447 | |
| dc.subject | Astrophysics | |
| dc.title | On `The spectral and temporal properties of an Ultra--Luminous X-ray source in NGC 6946', by Senorita Devi et al | |
| dc.type | text |