Accretion onto the Companion of η Carinae during the Spectroscopic Event. IV. The Disappearance of Highly Ionized Lines

摘要: We show that the rapid and large decrease in intensity of high-ionization emission lines from η Carinae massive binary system can be explained by accretion model. These are emitted material nebula around is being ionized radiation hot secondary star. The suffer 3 months long deep fading every 5.54 yr, assumed to orbital period system. In model, for ~70 days less star accreting mass primary wind instead blowing its fast wind. event has two effects substantially reduce high-energy ionizing flux star: (1) accreted absorbs a larger fraction flux. (2) forms temporary blanket increases effective radius, hence lowering temperature photons. This explanation compatible with at same time X-ray declining minimum pronounced polar directions.