Results 251 to 260 of about 418,445 (289)

Global Dust Extinction and Occurrence Data

open access: yes, 2021
Seasonal global dust extinction and ...
Kang Yang, Zhien Wang, Tao Luo
openaire   +2 more sources

Dust deflagration extinction

Process Safety Progress, 2000
Abstract Two basic phenomenological models for deflagration propagation in dust clouds are discussed as the basis for interpreting explosion suppression results. The first model is based on oxygen diffusion to fuel dust particles as the controlling step in explosion propagation through a dust cloud.
Kris Chatrathi, John Going
openaire   +1 more source

Interstellar Dust and Extinction

Annual Review of Astronomy and Astrophysics, 1987
The ultraviolet (UV) region of the spectrum has been crucial in providing information on the nature of the material and size distribution of the particles of interstellar dust. Before there were any measurements of the UV properties of interstellar extinction, interstellar particles were believed to be composed primarily of dirty ices.
openaire   +1 more source

Raman lidar monitoring of extinction and backscattering of African dust layers and dust characterization

Applied Optics, 2003
Results on the monitoring of strong African dust outbreaks at Lecce in the southeastern corner of Italy (40 degrees 20' N, 18 degrees 6' E) during May 2001 are presented. This activity has been performed in the framework of the European Aerosol Research Lidar Network (EARLINET).
DE TOMASI, Ferdinando   +2 more
openaire   +4 more sources

Dust extinction from Paschen-Balmer lines

1996
We have studied the dust extinction of spiral galaxies by determing the attenuation of the emission from giant extragalactic H II regions. The aim is to push CCD observations as far into the near-IR as possible to compare the near-IR Paschen lines with blue Baimer lines separated by a wide wavelength interval including the corresponding multiplet lines
Petersen, L.   +2 more
openaire   +2 more sources

Analysis of dust through extinction

Astrophysics and Space Science, 1992
Extinction is treated through the optical thickness τ. Some important characters of dust, such as the composition and the size of grains, are reviewed in the light of observational evidence. Extinction is investigated through three kind of parameters: (1) those affecting it directly such as the geometrical cross sections of the grains (through the ...
openaire   +1 more source

Mapping Dust Extinction in Molecular Clouds

1997
Infrared array cameras have enabled the measurement and mapping of dust extinction within molecular clouds to significantly greater optical depths and at significantly higher angular resolution than previously possible. In this paper we present a map of the dust extinction in the dark cloud L978 in Cygnus derived from a large-scale multi-wavelength ...
João Alves, Charles J. Lada
openaire   +1 more source

Mapping Dust Extinction with IR Cameras

1994
In this paper we describe a powerful method for using data obtained in large scale, multi-wavelength, infrared imaging surveys to directly measure and map the distribution of extinction through a molecular cloud. This method combines measurements of near-infrared color excess and certain techniques of star counting to derive mean extinctions through a ...
Charles J. Lada   +3 more
openaire   +1 more source

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