What is the nature of BAL quasars
收藏ESA Earth Online2026-06-22 收录
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GTAbout 1015% of optically selected QSO have optical/UVspectra showing deep, wide absorption troughs, displayedto the blue of their corresponding emission lines. The Xrayproperties of BALQSOs as a class are unknown. In a study ofBALQSOs from publicly available ROSAT data mainly upper limitswere found. This implies that the objects are either highlyabsorbed, intrinsically underluminous in Xrays, or both.
