After the Supernova: Runaway Stars and Massive X-ray Binary Populations with Metallicity |
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| Authors: | L M Dray J E Dale M E Beer A R King R Napiwotzki |
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| Institution: | (1) Theoretical Astrophysics Group, Department of Physics and Astronomy, University of Leicester, Leicester, UK;(2) Centre for Astrophysics Research, University of Hertfordshire, Hertfordshire, UK |
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| Abstract: | One of the main pathways by which massive runaways are thought to be produced is by the disruption of a binary system after the supernova (SN) of one of its components. Under such a scenario, the populations of runaway stars in different phases should reflect the input binary population and its evolution. Conversely, if the system stays together after the SN, a High Mass X-Ray Binary (HMXB) may result. We present simulations exploring the behaviour of such runaway and HMXB populations with metallicity, and compare them to observations. As many as two-thirds of massive runaway stars may be produced by supernovae in binaries. Decreasing metallicity lowers the fraction of O stars which are runaway, but increases the Wolf-Rayet runaway fractions and the number of potential HMXBs. |
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| Keywords: | stars: early-type binaries: close stars: kinematics |
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