BRIGHTNESS AND FLUCTUATION OF THE MID-INFRARED SKY FROM AKARI OBSERVATIONS TOWARD THE NORTH ECLIPTIC POLE
BRIGHTNESS AND FLUCTUATION OF THE MID-INFRARED SKY FROM AKARI OBSERVATIONS TOWARD THE NORTH ECLIPTIC POLE
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AKARI 观测到的北黄道中红外天空的亮度和涨落
DOI：
10.1088/0004-637x/760/2/102
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
S. Matsuura
中科院分区：
文献类型：
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作者：
J. Pyo;T. Matsumoto;W. Jeong;S. Matsuura
我们展示了日本红外线天文卫星Akari观测到的中红外天空的平坦度。AKARI对北黄道极冷相的监测有9个波段，覆盖范围为2.4~2 4 μm，其中6个中红外波段在本研究中使用。为了寻找天空亮度的波动，我们对图像进行了功率谱分析。观测到的波动可以用光子噪声、弱源散粒噪声和银河卷云的波动来解释。中红外短波(7、9和11 μm)在几角分尺度上的波动很大程度上是由星际尘埃卷云的漫射银河光引起的。在中红外长波段(15、18和24 μm)，光子噪声是从几角秒到几角分尺度波动的主要来源。剔除这些贡献后，200“的剩余起伏幅度最多为1.04±0.23 NW m−2 sr−1或亮度的0.05%(24 μm)，至少为0.47±0.14 NW m−2 sr−1或18 μm时的0.02%。考虑2σ误差，黄道光的起伏上限为天空亮度的0.03%。
We present the smoothness of the mid-infrared sky from observations by the Japanese infrared astronomical satellite AKARI. AKARI monitored the north ecliptic pole (NEP) during its cold phase with nine wave bands covering from 2.4 to 24 μm, out of which six mid-infrared bands were used in this study. We applied power-spectrum analysis to the images in order to search for the fluctuation of the sky brightness. Observed fluctuation is explained by fluctuation of photon noise, shot noise of faint sources, and Galactic cirrus. The fluctuations at a few arcminutes scales at short mid-infrared wavelengths (7, 9, and 11 μm) are largely caused by the diffuse Galactic light of the interstellar dust cirrus. At long mid-infrared wavelengths (15, 18, and 24 μm), photon noise is the dominant source of fluctuation over the scale from arcseconds to a few arcminutes. The residual fluctuation amplitude at 200″ after removing these contributions is at most 1.04 ± 0.23 nW m−2 sr−1 or 0.05% of the brightness at 24 μm and at least 0.47 ± 0.14 nW m−2 sr−1 or 0.02% at 18 μm. We conclude that the upper limit of the fluctuation in the zodiacal light toward the NEP is 0.03% of the sky brightness, taking 2σ error into account.
DOI：
10.1088/0004-637x/742/2/124
发表时间：
2010-10
期刊：
The Astrophysical Journal
影响因子：
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作者：
T. Matsumoto;T. Matsumoto;H. Seo;W. Jeong;Ho-Gyu Lee;Shuji Matsuura;H. Matsuhara;S. Oyabu;S. Oyabu;J. Pyo;T. Wada
通讯作者：
T. Matsumoto;T. Matsumoto;H. Seo;W. Jeong;Ho-Gyu Lee;Shuji Matsuura;H. Matsuhara;S. Oyabu;S. Oyabu;J. Pyo;T. Wada
远红外探测极限-I.Sky因银河卷云而混乱
DOI：
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发表时间：
2005
期刊：
Monthly Notices of the Royal Astronomical Society Volume 357, Issue 2
影响因子：
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作者：
Jeong;Woong-Seob;Mok Lee;Hyung;Pak;Soojong et al.
通讯作者：
Soojong et al.
DOI：
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发表时间：
2007
期刊：
Publication of Astronomical Society of Japan 59
影响因子：
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作者：
T.Wada;et. al.
通讯作者：
et. al.