Evolution of the X-ray luminosity and metallicity of starburst blown superbubbles |
| |
| Authors: | Sergey A Silich † Guillermo Tenorio-Tagle ‡ Roberto Terlevich § Elena Terlevich †¶ Hagai Netzer |
| |
| Institution: | Instituto Nacional de Astrofísica Optica y Electrónica, AP 51, 72000 Puebla, México; Main Astronomical Observatory, National Academy of Sciences of Ukraine, 03680, Kiev-127, Golosiiv, Ukraine; Institute of Astronomy, Madingley Road, Cambridge CB3 0HA; School of Physics and Astronomy, Tel Aviv University, Tel Aviv, Israel |
| |
| Abstract: | We have modelled the evolution of hot superbubbles in starbursts, taking into account the rapid changes in the chemical composition of the interior of the superbubbles resulting from the large stellar mass loss, i.e. stellar winds from massive young stars and type II supernovae. We have followed in detail the time-dependent production and mixing of oxygen and iron in the interior of the hot superbubbles and showed that while the oxygen abundance rapidly climbs to over solar values in less than 10 Myr, iron abundance remains always under solar. This highly enhanced oxygen metallicity boosts the early X-ray luminosity of superbubbles while keeping the iron abundance subsolar. This brings theory and X-ray observations of the luminosity and metal content of young starbursts closer together. |
| |
| Keywords: | hydrodynamics ISM: abundances ISM: bubbles galaxies: starburst X-rays: bursts |
|
|
