X-ray spectroscopy of 10-year-period colliding wind binary WR19 at periastron
收藏ESA Earth Online2026-06-22 收录
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The periastron of the WC5+O9 colliding wind binary WR19 will come in 2017 duringthe XMMNewton AO16 phase. WR19 is a massive binary with a 10.1 yr orbitalperiod with a high eccentric orbit. The Xray spectrum is the best measure ofconditions in the hot postshock gas, and the crucial time for observations isaround periastron passage when densities and emitting volume are changing mostrapidly. We therefore propose 60ksec observation at periastron. By measuring theXray luminosity and the column density, we will derive the massloss rates ofthese stars that were not measured yet at any other wavelengths. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]
