分子云中尘埃粒子的带电

Q4 Physics and Astronomy

Astronomical and Astrophysical Transactions Pub Date : 2007-10-01 DOI:10.1080/10556790601156667

Y. Shchekinov

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引用次数: 3

摘要

在分子云中，尘埃电荷可以通过宇宙射线电离产生的非热电子来确定。如果非热电子的能量为E≥2kev，其分数仅为分子气体中热电子的10−3 ~ 10−4，则在气体密度n≈105 ~ 106 cm−3范围内，颗粒电荷可高达| z |≈10。在高密度范围n>106 cm−3，晶粒电荷接近热极限| z |≈0.3。

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Charging of dust particles in molecular clouds

Abstract In molecular clouds the dust charge can be determined by non-thermal electrons from cosmic-ray ionization. If the energy of the non-thermal electrons is E≥2 keV and their fraction is only 10−3–10−4 of the thermal electrons in a molecular gas, the grain charge can be as high as | z | ≈ 10 in the range of gas densities n≈ 105–106 cm−3. In the high-density range n>106 cm−3, the grain charge approaches the thermal limit | z | ≈ 0.3.

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来源期刊

Astronomical and Astrophysical Transactions Physics and Astronomy-Instrumentation

CiteScore

0.40

自引率

0.00%

发文量

期刊介绍： Astronomical and Astrophysical Transactions (AApTr) journal is being published jointly by the Euro-Asian Astronomical Society and Cambridge Scientific Publishers, The journal provides a forum for the rapid publication of material from all modern and classical fields of astronomy and astrophysics, as well as material concerned with astronomical instrumentation and related fundamental sciences. It includes both theoretical and experimental original research papers, short communications, review papers and conference reports.