Izmodenov, V.I., Malama, Y. and Ruderman, M.S. (2005) Solar cycle influence on the interaction of the solar wind with Local Interstellar Cloud. Astronomy and Astrophysics, 429 (3). pp. 1069-1080. ISSN 1432-0746
Abstract
We present results of a new time-dependent kinetic model of the H atom penetration through the solar wind - interstellar medium interaction region. A kinetic 6D (time, two dimensions in space, and three dimensions in velocity-space) equation for interstellar H atoms was solved self-consistently with time-dependent Euler equations for the solar wind and interstellar charged components. We study the response of the interaction region to 11-year solar cycle variations of the solar wind dynamic pressure. It is shown that the termination shock location varies within ±7 AU, the heliopause variation is ~4 AU, and the bow shock variation is negligible. At large heliocentric distances, the solar cycle induces 10-12% fluctuations in the number density of both primary and secondary interstellar H atoms and atoms created in the inner heliosheath. We underline the kinetic behavior of the fluctuations of the H atom populations. Closer to the Sun the fluctuations increase up to 30-35% at 5 AU due to solar cycle variation of the charge exchange rate. Solar cycle variations of interstellar H atoms in the heliospheric interface and within the heliosphere may have major importance for the interpretation of H atom observations inside the heliosphere.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © ESO 2005. Reproduced with permission. |
Keywords: | Sun, solar wind, interplanetary medium, ISM, atoms, activity, hydrodynamics |
Dates: |
|
Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > School of Mathematics and Statistics (Sheffield) |
Depositing User: | Repository Officer |
Date Deposited: | 16 Nov 2006 |
Last Modified: | 18 Nov 2015 11:52 |
Published Version: | http://dx.doi.org/10.1051/0004-6361:20041348 |
Status: | Published |
Publisher: | EDP Sciences |
Refereed: | Yes |
Identification Number: | 10.1051/0004-6361:20041348 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:1717 |