From: Olga Malandraki

Dear Colleague,

The purpose of this letter is to encourage you to submit for the next Scientific Assembly of the European Geophysical Union in Vienna (May, 2 to May, 7, 2010) a contributed paper to be included in event number: ST1.2

entitled: “The structure of the outer heliosphere during the unusual present solar minimum”

A complete description of the event, as given below, and abstract submission instructions are available on the Assembly web page (http://meetingorganizer.copernicus.org/EGU2010).

“Our understanding of the physics of the heliosphere is challenged by recent observations related to both its inner and outer boundary. The latter is explored directly by the Voyager spacecraft and remotely by the Interstellar Boundary Explorer (IBEX) revealing an unexpected structure of the heliosheath. This structure is partly influenced by solar activity that presently exhibits an unusual minimum. Up to now it appears that no satisfactory explanation has been provided for the unanticipated observations like the geometry and physical nature of the termination shock or the heliosheath source regions of suprathermal particle populations. Because these phenomena inherently carry imprints of solar activity this session intends to bring together expertise in theory and observations from the inner and the outer heliospheric communities. Contribution from current spacecraft mission and ground based observations as well as theoretical work is solicited”

It should be understood that this letter is not a commitment on the part of the organizers to provide financial support or complimentary registration. Should financial support be needed, follow the instructions posted on the Assembly web page.

Yours sincerely,

Hans Fahr and Bernd Heber