Second ISSI Meeting on

Coordinated Observations
of the Gravitational Focusing Cone of the Local Interstellar Medium at 1 AU

June 25 – 29, 2001

Circular

Eberhard Möbius

Space Science Center and Department of Physics, University of New Hampshire

Scientific Team

John Raymond, SOHO UVCS

John Vallerga, EUVE

George Gloeckler, ACE and Ulysses SWICS

Daniel Rucinski, (Maciej Bzowski), Modeling

(Darrell Judge), Don McMullin, SOHO CELIAS SEM

Rosine Lallement, (Jean-Loup Bertaux) EUV Absorption, SOHO SWAN, Modeling

(William Thompson), SOHO CDS

Manfred Witte, Ulysses GAS

Hans Fahr, Modeling

Sergei Chalov, Modeling

Reinald Kallenbach, Ruedi von Steiger, ISSI

Eberhard Möbius,  Chair

Toshio Terasawa, M. Oka, University of Tokyo, Japan, GEOTAIL, NOSOMI
Hirotomo Noda (U. Graz)

______: Either confirmation to me about attendance or with ISSI about accommodations

 

Additional participants and/or consultants:

Vladimir Izmodenov, Modeling of interstellar flow (currently at ISSI)

Anuschka Pauluhn, SUMER calibration  (currently at ISSI)

Lukas Saul, Pickup ions, modeling, (graduate student at UNH)

Stephen Fuselier, IMAGE LENA observations of interstellar gas


General

In the following I will present a tentative structure of our meeting and related plans. Because we are a small group the meeting is very flexible. Please feel free to send me any comments, criticisms additions etc. that you might have. We will start with short presentations to get everybody on the same page. Therefore the presentations should be updates that are important for everyone in the group. I am only providing some suggestions with my take on the titles. Of course, they may be completely biased by my narrow view. I expect that the program and sequence will develop as we go. Please let me know if you have any specific presentation in mind that is important for our work, but which I didn’t include yet. However, please bear in mind that this should be a working meeting with detailed on-site work and not a meeting just filled with presentations. We need to understand each other’s data and models though in order to get going. I would like to suggest that the presentations be made brief, mostly updates. Long discussions will be o.k. though!

Data Availability

For our detailed work we now have the main data sets and modeling programs available on site. Modeling programs will also be on several people’s laptops. For data that are available on the www, we have links from our ISSI web site. I have received several data sets that I shifted to the ISSI site. The files are all in a Directory called “ConeWorkshop_2001” with a brief description in the file “DataCompilation_2000.doc”. Here is the current status:

-         He Density Models: Both Daniel and Rosine promised to have their models on site. Meanwhile they have been compared and check out within a few %. (an action item from last year’s meeting!)
I received an output from Daniel’s model for
nion = 7.5 . 10-8 s-1 and nion = 1.5 . 10-7 s-1. The outputs are on the ftp site as .doc and .txt files.
Please ignore the files: He_DR_results.doc/.txt. I can’t delete them. They were the old ones with a bug. The other files: He_DR_results_Ion7.5e-8.doc/.txt and _Ion1.5e-7.doc/.txt are correct.

-         Pickup Ions: I have 31-day averages of the ACE SWICS pickup ion distribution function, incremented by 1 day.
They are on the ftp site as ascii file.
George, we talked about having the information as a function of V/Vsw, too. Then we could directly run some comparison with Sergei Chalov’s model.
Toshio: Is it possible to get an equivalent data set for the Nozomi data?

-         Pickup Ion Models: Lukas received Sergei’s code. We are trying to work this together with Daniel’s neutral gas model and our integration over various instrument functions. We hope to have this available at the workshop.
Sergei, we will have your code ready to go on an ISSI machine. Lukas, this is a task for you to move it over.

-         EUV Lines (UVCS and EUVE): I do have a set of calibrated absolute intensities with the viewing directions in GSE coordinates and heliospheric (ecliptic) coordinates from SOHO UVCS.
The results for all observations along with viewing direction and location are on the ftp site.
John V., do we get your values from EUVE, too?
Toshio: He backscatter observations with Nozomi will be covered during a presentation.

-         Neutral Densities: We have a link to the Ulysses GAS sky maps. Manfred is working hard on the analysis of the Dec 2000 data.

-         Solar EUV Monitor Data: Integral fluxes and fluxes in the 304 Å band as a function of time are available on the USC www site linked through the ISSI server. Don has also compiled fluxes of the Mg II proxy, which is available over an extended time.

-         CDS Full Sun Scans: I have the latest CDS data set.
A file with line widths, peak intensities and integral intensities integrated over the solar disk is on the ftp site.
Don, have you tried a direct comparison with the SEM data? I seem to remember you told me that you were in contact will Bill Thompson.

-         SUMER He I 584 line profiles: I received plots (as ps files) and descriptions of the SUMER line profiles from Klaus Wilhelm for Dec 4, 2000, and Jun 10, 1996.
They are on the ftp site.

-         Ancillary Data: I will add links to the ACE Level II data and the SOHO MTOF data for solar wind proton, alpha fluxes, proton densities and speeds as a function of time.
We have received SW electron densities and temperatures from ACE SWEPAM from Ruth Skoug for Nov 98 – Jan 99.
This data set is on the ftp site as ascii file.
We are expecting also newer data and data from WIND through Charlie Farrugia.

-         IMAGE LENA: Ruedi is adding a link to the LENA discussion site on the interstellar gas observations.

-         Anything else? Have I forgotten important information? Please let me know.
Rosine, maybe some discussion about the current difference between He and H parameters, as observed inside the heliosphere would be appropriate this time. Can you suggest a link for this information?
We can add information to the site as we go, when we are at the meeting. So people can effectively use all that information when back home again.

 


Structure of the meeting

Monday – Tuesday morning

Introductory presentations

Welcome, overview, logistics, plan for the week    (Möbius, von Steiger)

– Where are we going with the workshop?  (Möbius)

Diagnostics of the focusing cone close to the sun (2000) (Raymond)

Scan of the focusing cone in the anti-sunward direction (2000) (Vallerga)

He Pickup ion observations at 1 AU and from Ulysses (2000) (Gloeckler)

He pickup on Geotail and the Nozomi Mars Probe (2000)                           (Noda et al.)
                        Overview (Geotail/NOZOMI)                        H. Noda
                         Dec 2000 cone crossing, He+ acceleration (Geotail)                        M. Oka
                         Apr 2000 cone crossing, includ. UV obs. (Nozomi)                        H. Noda
                         Preparation of 2001 Aug cone crossing (NOZOMI)                        H. Noda

Interstellar parameters from neutral gas measurements (2000)       (Witte)

Determination of the photoionization rate for He (2000) (McMullin)

Modeling of the ionization of LISM He (Rucinski)

Spatial and velocity distribution of He pickup ions in the cone region
 – Related transport and acceleration processes   (Chalov)

Highlight of open questions (lead: Fahr, Izmodenov, Möbius)

General discussion of our approach, response by modelers, publication plans

Tuesday morning – Thursday afternoon

Work on data and interpretation in WGs:

a)      Remote sensing group (Lallement, Raymond, Vallerga + some modelers + 1 ISSI)

b)      In-situ group (Gloeckler, Möbius, Witte, McMullin, Terasawa, Noda + some modelers + 1 ISSI)

Further presentations (according to schedule of presenters):

      Tu PM: Modeling of UV backscattering (Lallement)
Thu: IMAGE LENA Observations of ISM Neutrals  (Fuselier)

Use plenary meetings as needed, but at least every morning and after lunch.

Thursday afternoon

Presentation of WG results and open questions              WGs

Discussion (all)

Plans for work at home, publication plans         (all)

      Friday

Executive Meeting        (subgroup including Möbius, von Steiger, Kallenbach + others)