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Argon, krypton, and xenon abundances in the solar wind measured in silicon from the genesis mission

Heber, V. S. and Baur, H. and Wieler, R. and Wiens, R. C. and Burnett, D. S. (2008) Argon, krypton, and xenon abundances in the solar wind measured in silicon from the genesis mission. Meteoritics and Planetary Science, 43 (S7). A53-A53. ISSN 1086-9379. doi:10.1111/j.1945-5100.2008.tb00711.x.

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Up to now solar wind (SW) abundances of Kr and Xe have been exclusively determined using SW irradiated regolith [1]. Hence, one of Genesis’s major objectives is to obtain the heavy noble gas composition of the present-day SW using artificial targets exposed to the SW for 2.5 years. SW abundances will allow to study fractionation processes upon SW formation, e.g., due to the first ionization potential (FIP-effect) [2]. This is of importance to deduce solar abundances of noble gases and other elements from SW data. Solar, i.e., photospheric, abundances of noble gases are indirectly determined due to the lack of suitable lines in the spectrum. Recently, solar abundance estimates for Ne and Ar were strongly reduced whereas Kr and Xe changed only slightly [3]. This led to a dramatic decrease of the solar Ar/Kr ratio by a factor of ~3 from the earlier value [4] of 2140. If true, this change would invalidate theories of heavy noble gas fractionation in the SW identified with regolith data [1, 5]. The Kr and Xe composition in present-day SW will enable us to reassess solar abundances and fractionation theories. Thus, we concentrate here on abundances of Ar, Kr and Xe in the bulk SW.

Item Type:Article
Related URLs:
URLURL TypeDescription
Wieler, R.0000-0001-5666-7494
Wiens, R. C.0000-0002-3409-7344
Burnett, D. S.0000-0001-9521-8675
Additional Information:© 2008 The Meteoritical Society. Article first published online: 26 Jan. 2010.
Issue or Number:S7
Record Number:CaltechAUTHORS:20130130-112648868
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Official Citation:(2008), Abstracts. Meteoritics & Planetary Science, 43: A15–A178. doi: 10.1111/j.1945-5100.2008.tb00711.x
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:36688
Deposited By: Tony Diaz
Deposited On:30 Jan 2013 22:42
Last Modified:09 Nov 2021 23:23

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