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arXiv 1004.5445astro-ph.EP
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用CIBER观测黄道光的近红外光谱

Observations of the Near-Infrared Spectrum of the Zodiacal Light with CIBER

K. Tsumura, J. Battle, J. Bock, A. Cooray, V. Hristov, B. Keating, D. H. Lee, L. R. Levenson, P. Mason, T. Matsumoto, S. Matsuura, U. W. Nam, T. Renbarger, I. S… 展开作者

K. Tsumura, J. Battle, J. Bock, A. Cooray, V. Hristov, B. Keating, D. H. Lee, L. R. Levenson, P. Mason, T. Matsumoto, S. Matsuura, U. W. Nam, T. Renbarger, I. Sullivan, K. Suzuki, T. Wada, M. Zemcov

摘要:

行星际尘埃(IPD)散射太阳辐射,导致黄道光,在光学和近红外波长的天体漫射亮度占主导地位。小行星碰撞和彗星喷射都产生IPD,但这两个来源的相对贡献仍然未知。宇宙红外背景实验(CIBER)上的低分辨率光谱仪(LRS)观测到了黄道纬度范围内750至2100 nm之间的天体物理天空光谱。由此产生的黄道光光谱比太阳光谱更红,并且在大约900 nm处显示出以前未报道的宽吸收特征,这表明IPD材料中存在硅酸盐。在测量误差范围内,黄道光的光谱形状在所有黄道纬度上都是各向同性的。黄道光光谱,包括使用红外遥感卫星数据得到的延伸到2500纳米的波长范围,在质量上与S型小行星的反射率相似。这一结果可以解释为S型小行星尘埃接近地球轨道,以及与彗星尘埃相比,彗星尘埃的相对高的散射度。

英文摘要:

Interplanetary dust (IPD) scatters solar radiation which results in the zodiacal light that dominates the celestial diffuse brightness at optical and near-infrared wavelengths. Both asteroid collisions and cometary ejections produce the IPD, but the relative contribution from these two sources is still unknown. The Low Resolution Spectrometer (LRS) onboard the Cosmic Infrared Background Experiment (CIBER) observed the astrophysical sky spectrum between 750 and 2100 nm over a wide range of ecliptic latitude. The resulting zodiacal light spectrum is redder than the solar spectrum, and shows a broad absorption feature, previously unreported, at approximately 900 nm, suggesting the existence of silicates in the IPD material. The spectral shape of the zodiacal light is isotropic at all ecliptic latitudes within the measurement error. The zodiacal light spectrum, including the extended wavelength range to 2500 nm using IRTS data, is qualitatively similar to the reflectance of S-type asteroids. This result can be explained by the proximity of S-type asteroidal dust to Earth's orbit, and the relativily high albedo of asteridal dust compared with cometary dust.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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