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DISCOVERY OF A TYPE 2 QUASAR AT z = 0.9

机译:在z = 0.9时发现2类拟态

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摘要

We report the discovery of a narrow-line, X-ray-luminous galaxy at z = 0.9, which is the counterpart of an X-ray source detected in a deep pointing observation with the Advanced Satellite for Cosmology and Astrophysics. The object has a hard X-ray spectrum; it is significantly detected only in the 2-10 keV band, with a flux of ~1 X 10~(-13) ergs s~(-1) cm~(-2). Its rest X-ray luminosity in the 2-10 keV band is estimated to be ~1 X 10~(44) ergs s~(-1) (q_0 = 0.5, H_0 = 50 km s~(-1) Mpc~(-1)). The optical spectrum shows high-excitation and high-ionization lines but no significant broad emission line component. All these properties imply that this object is a "type 2 QSO."
机译:我们报告发现在z = 0.9处发现了一条窄线,X射线发光星系,这是在用宇宙学和天体物理学高级卫星进行的深指向观测中检测到的X射线源的对应物。物体具有硬的X射线光谱。它仅在2-10 keV波段被发现,通量为〜1 X 10〜(-13)ergs s〜(-1)cm〜(-2)。其在2-10 keV波段的其余X射线光度估计约为〜1 X 10〜(44)ers s〜(-1)(q_0 = 0.5,H_0 = 50 km s〜(-1)Mpc〜( -1))。光谱显示出高激发和高电离线,但没有明显的宽发射线成分。所有这些属性暗示该对象是“类型2 QSO”。

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