HST Lyman‐alpha absorption spectra toward nearby stars as a remote diagnostic of the heliosheath plasma properties
作者:
Vlad Izmodenov,
Brian Wood,
Rosine Lallement,
期刊:
AIP Conference Proceedings
(AIP Available online 1903)
卷期:
Volume 679,
issue 1
页码: 63-66
ISSN:0094-243X
年代: 1903
DOI:10.1063/1.1618542
出版商: AIP
数据来源: AIP
摘要:
A self‐consistent model of the solar wind interaction with the two‐component (plasma and H atoms) interstellar medium is employed to calculate heliospheric Lyman‐alpha absorption spectra. It is shown that the heliospheric absorption consists of absorption in the hydrogen wall region and in the heliosheath. Both absorption components are computed in different directions. We perform a parametric study by varying the proton and H atom number densities of the interstellar gas. The theoretical absorption spectra are compared with Hubble Space Telescope observations toward six nearby stars. Results of the comparison and possible constraints on the structure of the heliospheric interface are presented and discussed. © 2003 American Institute of Physics
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