Remnants of massive metal-poor stars: viable engines for ultra-luminous X-ray sources

(2) INAF-OAPD); E. Ripamonti (1); L. Zampieri (2); M. Colpi (1) ((1) University of Milano-Bicocca; M. Mapelli (1)

arxiv: 1009.5706 · v1 · pith:DXPZJ7OVnew · submitted 2010-09-28 · 🌌 astro-ph.CO · astro-ph.HE

Remnants of massive metal-poor stars: viable engines for ultra-luminous X-ray sources

M. Mapelli (1) , E. Ripamonti (1) , L. Zampieri (2) , M. Colpi (1) ((1) University of Milano-Bicocca , (2) INAF-OAPD) This is my paper

classification 🌌 astro-ph.CO astro-ph.HE

keywords massivex-raygalaxymetal-poormetallicitynumbersamplesources

0 comments

read the original abstract

Massive metal-poor stars might end their life by directly collapsing into massive (~25-80 Msun) black holes (BHs). We derive the number of massive BHs (N_BH) that are expected to form per galaxy via this mechanism. We select a sample of 66 galaxies with X-ray coverage, measurements of the star formation rate (SFR) and of the metallicity. We find that N_BH correlates with the number of observed ultra-luminous X-ray sources (ULXs) per galaxy (N_ULX) in this sample. We discuss the dependence of N_ULX and of N_BH on the SFR and on the metallicity.

This paper has not been read by Pith yet.

Remnants of massive metal-poor stars: viable engines for ultra-luminous X-ray sources

discussion (0)