image of <strong>the</strong> Earth-Mo<strong>on</strong> system, taken from Rosetta, from a distance of 70 milli<strong>on</strong> kilometres (see http://www.esa.int/esaSC/SEM8RA3VQUD_index_0.html). This image was taken by <strong>the</strong> Navigati<strong>on</strong> Camera System (NAVCAM) <strong>on</strong> board <strong>the</strong> Rosettaspacecraft, activated for <strong>the</strong> first time <strong>on</strong> 25 July 2004.New IOC Officers appointedAt <strong>the</strong> Quadrennial Oz<strong>on</strong>e Symposium 2004, new Internati<strong>on</strong>al Oz<strong>on</strong>e Commissi<strong>on</strong> officers were elected.The Internati<strong>on</strong>al Oz<strong>on</strong>eCommissi<strong>on</strong> (IOC) hasrecently elected its newofficers.The newly elected officers are IvarIsaksen (President), Sophie Godin-Beekman (Vice President) and ChristosZerefos (Secretary). The newly electedPresident, Ivar Isaksen, is a Professorat <strong>the</strong> University of Oslo, Department ofGeophysics.H<strong>on</strong>orary MembersR.D. Bojkov (Canada/Bulgaria),A. Brewer (UK), P.J. Crutzen(The Ne<strong>the</strong>rlands), †H.U. Dütsch(Switzerland), J. L<strong>on</strong>d<strong>on</strong> (USA), C.L.Mateer (Canada), M.J. Molina (USA)and F.S. Rowland (USA) have beennamed H<strong>on</strong>orary Members of <strong>the</strong> IOC.MembersNewly elected members of <strong>the</strong> IOCare:1. Balis D. (Greece)2. Barrie L. (Canada)3. Bodeker G. (New Zealand)4. Coetzee G. (S. Africa)5. Cuevas E. (Spain)6. Dentener F. (Italy)7. Diab R. (S. Africa)8. Dorokhov V. (Russia)9. Douglass A. (USA)10. Fioletov V. (Canada / Russia)11. Granier C. (France)12. Harris N. (UK)13. Kaempfer N. (Switzerland)14. Kelder H. (The Ne<strong>the</strong>rlands)15. Koehler U. (Germany)16. Krzyscin J. (Poland)17. Kurylo M. (USA)18. Lal S. (India)19. Logan J. (USA)20. Manney G. (USA)21. Nakane H. (Japan)22. Oltmans S. (USA)23. Pelaez J-C. (Cuba)24. Richter A. (Germany)25. Sharobiem W. (Egypt)26. Stolarski R. (USA)27. Stordal F. (Norway)28. Taalas P. (Finland)29. Wuebbles D. (USA)The EGgs wishes <strong>the</strong>m a fruitfulterm.Internati<strong>on</strong>al Associati<strong>on</strong> ofMeteorology and AtmosphericSciences (IAMAS)Internati<strong>on</strong>al Oz<strong>on</strong>e Commissi<strong>on</strong>(IOC)New Online Review Journalfor Solar Physics and related fieldsLiving Reviews in Solar Physics, is an electr<strong>on</strong>ic, open access, refereed journal devotedto providing <strong>the</strong> community with high quality reviews of all aspects of solar physics and related fields.Articles will be kept up-to-date by periodic revisi<strong>on</strong>s made by <strong>the</strong> authors.Living Reviews in Solar Physics, a purelyelectr<strong>on</strong>ic, open access, refereed journal devoted to providing<strong>the</strong> community with high quality up-to-date reviews of allaspects of solar physics and related fields (primarily <strong>the</strong> Sun-Earth and <strong>the</strong> solar-stellar c<strong>on</strong>necti<strong>on</strong>) is now <strong>on</strong>line. The journalbegins with two substantial and interesting articles, whichyou are invited to browse, download and read for free:- Yuh<strong>on</strong>g Fan: “Magnetic Fields in <strong>the</strong> Solar C<strong>on</strong>vecti<strong>on</strong>Z<strong>on</strong>e”- Brian E. Wood: “Astrospheres and Solar-like StellarWinds”An abstract of each of <strong>the</strong>se articles can be found below.Fur<strong>the</strong>r articles are in preparati<strong>on</strong> and will be put <strong>on</strong>lineas so<strong>on</strong> as <strong>the</strong>y are ready. Articles can also be accessed viaNASA’s ADS service. An important feature of <strong>the</strong> journal is thatarticles will be kept up-to-date by periodic revisi<strong>on</strong>s made by<strong>the</strong> authors (hence <strong>the</strong> name “Living Reviews”).Living Reviews in Solar Physics articles provide sophisticated<strong>on</strong>line functi<strong>on</strong>alities. The journal is published by <strong>the</strong>Max Planck Institute for Solar System Research in cooperati<strong>on</strong>with <strong>the</strong> Living Reviews BackOffice.Journal homepage:http://solarphysics.livingreviews.orgThere you can also order a Newsletter with which you willbe notified when new or substantially updated articles are put<strong>on</strong>line.Editor-in-Chief is Sami K. Solanki and <strong>the</strong> Editorial Boardc<strong>on</strong>sists of J. Christensen-Dalsgaard, E. Marsch, R. Rosner, T.Sakurai, C. Schrijver, M. Schuessler and R. Schwenn.For a list of upcoming articles you can checkhttp://solarphysics.livingreviews.org/Articles/upcoming.htmlTHE EGGS 8
Yuh<strong>on</strong>g Fan, “Magnetic Fields in <strong>the</strong> SolarC<strong>on</strong>vecti<strong>on</strong> Z<strong>on</strong>e” (incl. 142 references,19 figures and 4 movies)ABSTRACTRecent studies of <strong>the</strong> dynamic evoluti<strong>on</strong> of magnetic fluxtubes in <strong>the</strong> solar c<strong>on</strong>vecti<strong>on</strong> z<strong>on</strong>e are reviewed with focus <strong>on</strong>emerging flux tubes resp<strong>on</strong>sible for <strong>the</strong> formati<strong>on</strong> of solar activeregi<strong>on</strong>s. The current prevailing picture is that active regi<strong>on</strong>s<strong>on</strong> <strong>the</strong> solar surface originate from str<strong>on</strong>g toroidal magneticfields generated by <strong>the</strong> solar dynamo mechanism at <strong>the</strong> thintachocline layer at <strong>the</strong> base of <strong>the</strong> solar c<strong>on</strong>vecti<strong>on</strong> z<strong>on</strong>e. Thus<strong>the</strong> magnetic fields need to traverse <strong>the</strong> entire c<strong>on</strong>vecti<strong>on</strong> z<strong>on</strong>ebefore <strong>the</strong>y reach <strong>the</strong> photosphere to form <strong>the</strong> observed solaractive regi<strong>on</strong>s. This review discusses results with regard to<strong>the</strong> following major topics: 1. <strong>the</strong> equilibrium properties of <strong>the</strong>toroidal magnetic fields stored in <strong>the</strong> stable overshoot regi<strong>on</strong>at <strong>the</strong> base of <strong>the</strong> c<strong>on</strong>vecti<strong>on</strong> z<strong>on</strong>e, 2. <strong>the</strong> buoyancy instabilityassociated with <strong>the</strong> toroidal magnetic fields and <strong>the</strong> formati<strong>on</strong>of buoyant magnetic flux tubes, 3. <strong>the</strong> rise of emerging fluxloops through <strong>the</strong> solar c<strong>on</strong>vective envelope as modeled by<strong>the</strong> thin flux tube calculati<strong>on</strong>s which infer that <strong>the</strong> field strengthof <strong>the</strong> toroidal magnetic fields at <strong>the</strong> base of <strong>the</strong> solar c<strong>on</strong>vecti<strong>on</strong>z<strong>on</strong>e is significantly higher than <strong>the</strong> value in equipartiti<strong>on</strong>with c<strong>on</strong>vecti<strong>on</strong>, 4. <strong>the</strong> minimum twist needed for maintainingcohesi<strong>on</strong> of <strong>the</strong> rising flux tubes, 5. <strong>the</strong> rise of highly twistedkink unstable flux tubes as a possible origin of $\delta$-sunspots,6. <strong>the</strong> evoluti<strong>on</strong> of buoyant magnetic flux tubes in 3Dstratified c<strong>on</strong>vecti<strong>on</strong>, 7. turbulent pumping of magnetic flux bypenetrative compressible c<strong>on</strong>vecti<strong>on</strong>, 8. an alternative mechanismfor intensifying toroidal magnetic fields to significantly super-equipartiti<strong>on</strong>field strengths by c<strong>on</strong>versi<strong>on</strong> of <strong>the</strong> potentialenergy associated with <strong>the</strong> superadiabatic stratificati<strong>on</strong> of <strong>the</strong>solar c<strong>on</strong>vecti<strong>on</strong> z<strong>on</strong>e, and finally 9. a brief overview of ourcurrent understanding of flux emergence at <strong>the</strong> surface andpost-emergence evoluti<strong>on</strong> of <strong>the</strong> subsurface magnetic fields.FULL ARTICLE AT:http://www.livingreviews.org/lrsp-2004-1Brian E. Wood, “Astrospheres and SolarlikeStellar Winds” (incl. 156 references and13 figures)ABSTRACTStellar analogs for <strong>the</strong> solar wind have proven to be frustratinglydifficult to detect directly. However, <strong>the</strong>se stellar windscan be studied indirectly by observing <strong>the</strong> interacti<strong>on</strong> regi<strong>on</strong>scarved out by <strong>the</strong> collisi<strong>on</strong>s between <strong>the</strong>se winds and <strong>the</strong> interstellarmedium (ISM). These interacti<strong>on</strong> regi<strong>on</strong>s are called ``astrospheres’’,analogous to <strong>the</strong> ``heliosphere’’ surrounding <strong>the</strong>Sun. The heliosphere and astrospheres c<strong>on</strong>tain a populati<strong>on</strong>of hydrogen heated by charge exchange processes that canproduce enough H~I Ly$\alpha$ absorpti<strong>on</strong> to be detectable inUV spectra of nearby stars from <strong>the</strong> Hubble Space Telescope(HST). The amount of astrospheric absorpti<strong>on</strong> is a diagnosticfor <strong>the</strong> strength of <strong>the</strong> stellar wind, so <strong>the</strong>se observati<strong>on</strong>s haveprovided <strong>the</strong> first measurements of solar-like stellar winds. Resultsfrom <strong>the</strong>se stellar wind studies and <strong>the</strong>ir implicati<strong>on</strong>s forour understanding of <strong>the</strong> solar wind are reviewed here. Ofparticular interest are results c<strong>on</strong>cerning <strong>the</strong> past history of <strong>the</strong>solar wind and its impact <strong>on</strong> planetary atmospheres.FULL ARTICLE AT:http://www.livingreviews.org/lrsp-2004-2Sami K. SolankiName change for <strong>the</strong> Max Planck Institute for Aer<strong>on</strong>omyA letter from <strong>the</strong> Managing Director informs about name changefor <strong>the</strong> MPI for Aer<strong>on</strong>omy in Katlenburg-Lindau, Germany.24 June 2004.- A letter from <strong>the</strong> Managing Director informsabout name change for <strong>the</strong> MPI for Aer<strong>on</strong>omy in Katlenburg-Lindau,Germany:Dear Madam, dear Sir,Please allow me to inform you of an imminent developmentc<strong>on</strong>cerning our Institute. This Institute, which has existed since1957 under <strong>the</strong> name Max Planck Institute for Aer<strong>on</strong>omy, hasseen a number of transformati<strong>on</strong>s in its lifetime. During <strong>the</strong>50’s and 60’s, <strong>the</strong> scientific emphasis was <strong>on</strong> <strong>the</strong> explorati<strong>on</strong>of <strong>the</strong> Earth’s upper atmosphere, but in <strong>the</strong> following decadesthis was extended to include new areas involving <strong>the</strong> solar system.The current thrust of our research now c<strong>on</strong>centrates <strong>on</strong><strong>the</strong> explorati<strong>on</strong> of <strong>the</strong> Sun, Heliosphere, planets, and comets,that is, <strong>on</strong> all <strong>the</strong> essential parts of our solar system. With <strong>the</strong>retirement of Prof. Sir Ian Axford and Prof. Tor Hagfors andwith <strong>the</strong> appointment of Prof. Ulrich Christensen and myself,this new thrust is reflected in <strong>the</strong> directorship as well. This developmentwill for <strong>the</strong> time being, culminate with <strong>the</strong> retirementof Dr. Helmut Rosenbauer <strong>on</strong> 30th June 2004.In order to more accurate by reflect our Institute’s currentactivities, <strong>the</strong> Max Planck Society has accepted our proposalto change <strong>the</strong> name, effective 1st July 2004, to “Max-Planck-Institut für S<strong>on</strong>nensystemforschung” (in English, Max PlanckInstitute for Solar System Research). The renaming is coupledwith <strong>the</strong> introducti<strong>on</strong> of a new logo, which we hope will increase<strong>the</strong> Institute’s visibility.We shall make every effort to maintain <strong>the</strong> good reputati<strong>on</strong>of our Institute under <strong>the</strong> new name and “outfit”, and wherepossible, to enhance it. We look forward to many more successfulcollaborati<strong>on</strong>s.Sincerely yours,Prof. Dr. Sami K. SolankiManaging Director, MPI for Solar System ResearchTHE EGGS 9
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