PROJECT TITLE
Effects of
the heliosphere breathing due to solar cycle variations as seen in the
backscattered solar Lyman-alpha radiation collected by SOHO/SWAN, HST, Voyager 1, Cassini and
Galileo spacecraft over the solar cycle
TEAM MEMBERS
(team coordinator) Vlad Izmodenov, Lomonosov
Moscow State University, School of Mechanics and Mathematics, Vorobievy Gory, Moscow 119899, Russia; e-mail:
Eric Quémerais, Service d'Aéronomie
du CNRS, BP3, 91371 Verrières le Buisson
France (tel) INT+33 1 64 47 43 14
e-mail:eric.Quémerais@aerov.jussieu.fr
Wayne Pryor, Central Arizona College, 8470 N. Overfield Rd., Coolidge, AZ 85228 United States
;wyane_pryor@centalaz.edu
Maciej Bzowski, Space Research Centre PAS,
Bartycka 18A, 00-716
Dimitra
Koutroumpa, Service d'Aéronomie du CNRS, BP3, 91371 Verrières le
Buisson France (tel) INT+33 1 64 47 43 05
e-mail:dimitra.koutroumpa@aerov.jussieu.fr
Dmitry Alexashov, Institute for Problems in Mechanics, Russian
Academy of Sciences, prospekt Vernadskogo
101-1, Moscow 117526, Russia; e-mail: alexash@ipmnet.ru
Abstract
The interplanetary background
radiation has been used to study the interplanetary hydrogen distribution since
its discovery in the late 1960’s (Thomas and Krassa 1970; Bertaux and Blamont
1970). However, detailed study of interstellar hydrogen distribution in the
interplanetary space became possible only very recently due to measurements
made simultaneously by several spacecraft (Voyager 1 and 2, SOHO, HST, Ulysses, Galileo and Cassini) and to
tremendous achievements in detailed 3D and time dependent modeling of the
interstellar atoms in the heliosphere. The SWAN instrument on board of
In the proposed team-project we will
explore the effects of the heliosphere breathing due to the solar cycle
variations by analyzing backscattered solar Lyman-alpha radiation collected by
SOHO/SWAN, Voyager 1, HST, Galileo and Cassini spacecraft over the solar cycle.
The analysis will be performed by using state-of-the-art kinetic models of
interstellar H atom distributions. The small team proposed for this ISSI-team
project includes six scientists whose combined expertise will be sufficient to
achieve the main goals of the proposed project. Eric Quémerais and Dimitra Koutroumpa are working on
analyses of SOHO/SWAN, HST, and Voyager data. E. Quémerais is also an
expert in the radiative transfer modeling that is
crucially important to correct interpretation of the data. Wayne Pryor is
working on interpretation of the Galileo and Cassini Ly-alpha measurements. Vlad Izmodenov and Dmitry Alexashov
are working on the global modeling of the heliospheric interface structure. V.
Izmodenov will also serve as a team-coordinator. Maciej
Bzowski is known for his 3D time-dependent models of the interstellar H atom
distributions in the inner heliosphere that are complimentary to the global
heliospheric interface models, and on the heliospheric 3D, time dependent
ionization field.
Link to the project Web-page: http://gasdyn-ipm.ipmnet.ru/~
izmod/ISSI/index.html