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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Spitzer Space Telescope Constraint on the Stellar Mass of a z = 6.96 Lyα Emitter
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Spitzer Space Telescope Constraint on the Stellar Mass of a z = 6.96 Lyα Emitter

机译：Spitzer空间望远镜对z = 6.96Lyα发射体恒星质量的约束

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摘要

We obtained mid-infrared 3.6 and 4.5 μm imaging of a z = 6.96 Lyα emitter (LAE), IOK-1, discovered in the Subaru Deep Field, using Spitzer Space Telescope Infrared Array Camera observations. After removal of a nearby bright source, we found that IOK-1 is not significantly detected in any of these infrared bands m_(3.6μm) to ~ 24.00 and m_(4.5μm) ~23.54 at 3. Fitting population synthesis models to the spectral energy distribution consisting of the upper limit fluxes of the optical-to-infrared non-detection images and fluxes in detection images, we constrained the stellar mass, M _*, of IOK-1. This LAE could have either a mass as low as M_* < .= 2-9 X 10~8 M_⊙ for young age (< .= 10 Myr) and low dust reddening (A_v ~ 0) or a mass as large as M_* < .= 1-4 X 10 M_⊙ for either old age (> 100 Myr) or high dust reddening (A_v ~ 1.5). This would be within the range of masses of z ~ 3-6.6 LAEs studied to date, ~10~6 -10 ~(10) M_⊙. Hence, IOK-1 is not a particularly unique galaxy with extremely high mass or low mass, but is similar to one of the LAEs seen at later epochs.
机译：我们使用Spitzer空间望远镜红外阵列相机观察到了在斯巴鲁深场中发现的z = 6.96Lyα发射器（LAE）IOK-1的中红外3.6和4.5μm成像。去除附近的亮光源后，我们发现在3处m_（3.6μm）至〜24.00和m_（4.5μm）〜23.54的任何红外波段中均未显着检测到IOK-1。由光到红外非检测图像的上限通量和检测图像中的通量组成的能量分布，我们约束了IOK-1的恒星质量M _ *。该LAE的质量可能低至M_ * <。= 2-9 X 10〜8M_⊙（年轻（<。= 10 Myr）和低粉尘发红（A_v〜0），也可能低至M_ * <。= 1-4 X 10M_⊙适用于老年（> 100 Myr）或高粉尘泛红（A_v〜1.5）。这将在迄今为止研究的z〜3-6.6 LAE的质量范围内，即〜10〜6 -10〜（10）M_⊙。因此，IOK-1并不是质量特别高或质量极低的特别独特的星系，但与后来出现的LAE相似。

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