Near-infrared thermal emissivity from ground-based atmospheric dust measurements at ORM

被引：2

作者：

Lombardi, G. ^{[1
]}

Zitelli, V. ^{[2
]}

Ortolani, S. ^{[3
]}

Melnick, J. ^{[1
]}

Ghedina, A. ^{[4
]}

Garcia, A. ^{[4
]}

Molinari, E. ^{[4
]}

Gatica, C. ^{[5
]}

机构：

[1] European So Observ, Santiago 19, Chile

[2] Bologna Astron Observ, INAF, I-40127 Bologna, Italy

[3] Univ Padua, Dept Astron, I-35122 Padua, Italy

[4] Fdn Galileo Galilei & Telescopio Nazl Galileo, E-38712 Tenerife, Spain

[5] Pontificia Univ Catolica, Dept Astron & Astrophys, Santiago, Chile

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2011年 / 416卷 / 02期

关键词：

methods: data analysis; methods: statistical; site testing; MUCHACHOS SITE CHARACTERISTICS;

D O I：

10.1111/j.1365-2966.2011.19152.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present an analysis of the atmospheric content of aerosols measured at Observatorio del Roque de los Muchachos (ORM; Canary Islands). Using a laser diode particle counter located at the Telescopio Nazionale Galileo (TNG) we have detected particles of 0.3, 0.5, 1.0, 3.0, 5.0 and 10.0 mu m size. The seasonal behaviour of the dust content in the atmosphere is calculated. Spring has been found to be dustier than summer, but dusty conditions may also occur in winter. A method to estimate the contribution of the aerosols' emissivity to sky brightness in the near-infrared (NIR) is presented. The contribution of dust emission to the sky background in the NIR has been found to be negligible compared to the airglow, with a maximum contribution of about 8-10 per cent in the K-S band in the dusty days.

引用

页码：1585 / 1590

页数：6

共 24 条

[1] Vertical distribution of Saharan dust based on 2.5-year model predictions [J].