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67 ~[~POU6pLO~ 1972

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or OTCElpOE tOeIe yoAa1im aROtEAol)V 10 SOOIo tOl crUVOAOU tlllV yaAa~lrov EI( 101) 01Y(KEVTjXI)8tvtoe 6A11C0D RPOlClnnEl Oll at oltEipOl TCapouoLCiCouv 1tOAAaC aVOO)Jata~ IJtlCpo ii j1euroshyYaAa KEVC OtCllC)ClociloEle Kai l)wTcPEuOVTOe KA6S0lX Kat ItshyrEpa xapal(tT)p lOlLlCa EI Ta IJtlQ~U t(l)v Cn poundL pltilv l)lQOtf)j1010 OOtux a lCClVWV KClra t6v 6TCoiov 6 ltApoundov KOIV6~ tU1tOe rGlv

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H 9EooPT)TIKf) fPEUva tfle OItElPOeIOo)( OO)Jie loD raAo1lou ocpelAEl yo OE~IEAlOUltll tnt tUlV OEOOIJEVWV lampV 1IapalllPllcrEroV ~O)JCIX napa nlv (tCllJAOyOV ltPOOSOVlO unapxov OAlIeOV oev SiSel IlCaVOTCOlT)llKJV anavlT)clv el~ 10 pacnl(ov tPlti)[T))Ja noiov eIval 10 OnElpOElote ltp61U1tOV t6 01totov krXuEl ElO 10V ra1a~iav lJa~ H a1t(lvtllOl~ aotf) ltva)JpoundvElllL K)piro~ lt1t6 TOO~ paSlacrtpov61J0ult

H npoonftOrla poundp]l T] vpoundtolt lii~ CTCElPOeurolOODlt OO]lfje l)Lci lGlv )JOYlllUGlV ntl)irov aneOElX8T] npo oEKoneVtapoundtlw 1teplnou QVpoundTCOpl(1)e E1IEll)f) 6)JWlt oi )JayvT)lIKai l)uv6~ele opoOv )J6vov tltt to 10V0JlEVOU aepiou Elval np0(j)avpoundc Ott 10 ]IayvnTIKD nESa poundmopoDv ete If)V lCiVllOlV ToD 6Ep(OU Kai OlO)JOpltp(i)vouv ete ~IKpaV l(Al)JaKo tflV crnElPOEO~ OOIJt1V t oD raA~tou

H aveTCIlpKElll tampv ]Ia(VT)TlKi)v TCESirov Sui tilv poundp)Jl1vEpoundav ti)v a1lelpWv dC jleyaAT)v lCi~aKa Ggtl)nYllOE toult tPEUVtCt~ ete aeropiae PocnCo~ltvae trti trov OUVQptCllV ~OPUTlltO~ T6 6poundshyplOY lCal fI ICOVI ~ aItOTEhoDv )JOAle Ta 3 Tfje 6AT]lt )JatT)e poundv6e OTCEIPoelSoolt yaoliou EItpoundlOf) 01 elt TampV ltat tprov QalCOUJlEval OUVQJlEIO j3apUTT)TOlt dVOl OtIyxp6VC1llt Kai al ICUpl(i)l epai SuvashyJlEIC at tvtpyoooat tTCl t oD 6Eplou bEtal 6tl ol OUVaIJEIC Paputl1tolt elval at TC)JOV tnuepaTeuroCTEpm ete 10V faAoshy~LOV Kai OUVf1tW QOKOQV npoon-lgtOVlO pOAOV etc tflv av6nT)shy~LV Kat l~V Ihal11PllOlV li)V CJ1teurolpdlv KaTCt TT]V leuroAfUTa[ov OeuroKaC1Lav poundKl)l1AoDTal ]Iio ao~avo~tvl1 1tPOt[j11101C rtp6e l(u OUVQ]IeuroI~ papUtT)lO~ Sl(i If)V tp~velav TTje onElpopoundll)OUlt 6o~~

H l)latfpT)crle TGlV OnElpG)v Ola lleyaAO XPOVIICQ oloOtil]loTa oTColEAei eurov ~O(1lI(OV Rp6Ph11Jla EQv al middotO1[Elpal anoleAOOvtCtl 1IQV10n ono TOOt [Sioo aOttpae T61E A6y~ If)~ SLQqlOPlKije 1tEPlcrtPOtpT( OcpdAl)UV olaplCUle va aucrnEtpoDVTal Kal 1tpashyKllKWe va tiulOaV~ooVlol dc xp6vov )JLICPOlpoundPOV lGlv 005 Tfic flAlK(a~ TOU raAu~iou H ~nap~l~ 6]100 )JCY6AoU ap19]1oD CJrteuroIPOEIOGlV yaAa~Lampv )Jpound ]IlKp6v apl9)J6v crTCElpltilv KOl CXEtlshyK~ oAiyae 1tf(HpoundAlCEIe OUvnyoPeurot OTCtp lfje olatT]PilCEroe lroV crneuroIPUlV 0 Jl6voC tp6no~ TCapal(6~IVpoundro e llie tv A6yctl oumcoshyMolt poundIvai va Oex8UlfiEV 6n a anEipal Spoundv QTCOtEAODvtal mivshyTOle tIC TO) autoD UllICOU QAA chl 01 ocrttpEe lCal la vtl4gtT] aEshypiou l)ltpxoVtal IlEcrw l WV a-netpampv 6TCOU OJlroe napaJleurovouv neshyptCJaolEpov xpovov TCOP Oll poundl 10 )JE10~U lUlv CJnElp6gtv l)lashyaTl1j1a ETCoptvcolt lCae tlCacrTv ollYJlliv al crndpm anOTEshyAoDv TO )t(IOla 1tUICVOTl]lOe lflc UAT)e I(ot o uvE1tlOe l)tv e[val cruV-9Ele OAlKOI ~paxioveuroc a)Jd KU ~ OT 0 nUl( v 6111 T 0 e laquodensity waVes )

H 9Ewpia TlOv KUJJ6troV nUKv6tT)toC oletu1tw9 6PX1KG)lt il1t6 100 B Lindblad 6 61tOfolt tni noUu Etn fllO CXeuroli6v 6 IJOVO~ tPEUVT)TiJe uaxoAou~evo~ cruaTT]llatllC6gtlt ]It tflv )JeAttT]V ti1e crlteurolPOElool)e oO)Jfje lfl pOT)9elQ Tlilv tA~IKG)V 8UVU]IEroV H crVYXPovolt Uv6TCtUIC Ti1e 9eurowpiae l UlV KU)JQtrov nUlCVOtT)lOe OqleuroiAElaL Ei~ T6v cc Lin E~ 0 Lindblad IJEAElj) tlie t1tlshySp6CEle trov KU~uilroV 1tulCv61T)10C t1tl JlEjJOV())IJpoundVooV TPOx~Glv acTpoundpoov6 Li n t~eT6~Et pacrIKGle nlv Cuv6PlllolV I(aravo]lfe laquodistribut ion functioOraquo n oTCoia ElVOl auvapTllcne lfle Otshyoeroe Kat rij~ taXUtTJ1~ Kat SlSEl TflV 1tUKv6111ta ete 16v Xi)shypov tGlv cpltlOEWV YTC6 tflv ~OPCPT]v aorilv t6 1tp6pAll~a oLashynmoOtal cracpE(JtEpoV a( Opound )UOEle tOU 1tapolxn6lolv [ola[shytEpOV UOTPOVOJlIICOV tvolaqleuropov

To OTCElpouote OUvalJllCOV 1fESiov 100 Lin to onoiov 1(08 tshyKCrCTtT)V OlLYlJl1V iXEl tflv ~Opqlllv OITCATje AO(apleIJ11CijC (J1tEtshypru TCEPlcrrptqlETal )Jt ola9Epciv yooV IOlClIV tOXinT)la 11 611010 tlvOl tv ytvtl IJlK po-repa tt~ 6(pElAO)JEV11e ete tt1v OlaqlOpllCl]V TCEPlOtPO~f)v 100 yoAa~iou w ATCa~ Koi olJwupYl]9t1 to (J1tElshyPOEll)tc mUTO ml)(ov 1tapa~euroVEl atgttOSlalwvLt6~EVOV l)lCL 1(0shyraAA~AOU l)~ tKA0YTle ti1~ raxutT)ro~ 1teuroPlcrTpOCPfle rou 1tPOshyIClnttOUV l)uo O1tpoundIPoeloeie ppaxiovpounde ot OTCoTol TCapouCIwOUV TCOAAO XOPOK1T)PLO tLKo yV(Opia)Jala lUlV crnElpoell)ltIlv yaAashy~lampV 0 Lin EupfolCel on o( 1toUortAof ppaxiovElt anOteAOOv tv tvl)Ex6)JEVQV 10 6TCOtov 8uva1m va oUJlPti Elc ra tlrolEPlKo ~poundpT) tol) oAo1iou Eni 1tAtov ot IpaxiovEe otv tKTElVOVtal 1teuropav tflC CrltOaT6CECagt ~KEtvllC tK ToD KevtpOU ToD YaAa~(ou

67 ~[~POU6pLO~ 1972

E () pound11 ngomiddotttJ1l0V nuv OmcUv TOU rU)aLotJ Ot f3QUX(OJlfr na(J(uTavtai tI1rO i5mhjr AOYOQ8JLijr a7uiQa OVQtFlgoi)ITUt di xUTd n1 diEvOvVUtl tilt tpoundQl TO Oh t(JOII JflQUTrQocpilr TOV raAa~lov 0 VeOL a(1TEpt ai at Aapneul ]teetoxal HI wshyetaOlmiddottaampek to tawteuroua~ jJiflor Tliw f3eaxWvwv poundliP TO 06shyobeeol OO(loY0)10V naganueital 00 8Jr]V ti(v [tao toli 3ea101or To oneteOlUf~ lflonmOl ne(IOT(tcpetat wr Ot)oAO)1

jJi ywvlQ~1 TaXVriTa Qs

EI~ aTC6Ctllcnv 35 kpc be toC IdVTPOU poundupicncETClL 6 SLaCtEAshyA6)Jeurov~ PpaXirov T6 tvt6~ tOU ppaxiovo~ tOUtOU atplov TCapouCHltel EVtOvOV allttlVllltf)v LdVllOW )JE taxutl1ta urt6 50 ~Ugtc 200 kmjsec tAattOUlJevll JlEtci tfj~ 6TCOOtaCeuroW~ tK toD KtVtpOU

H ]IEYCLAUtepa 1I ocr6tT)~ aEplou EuplmcETal )Jeurota~u 5 al 15 kpc tvlj) )JlKpo TCoobtT)~ IiEpou cp96vEl ]ItxPt~ 6nocrtltof4X 20 kpc tIC toD KpoundVtpOU To 6plOV Elval OVYKEVtjXl)~VOv ICUshy

p[w~ cr~ Suo CTCcipW a 61t0Lal KEivtal trri TOU yaAa~laKOO tTClTCtoOU H )JoPqlt1 tGlv C1teurol pGlV d~ )JLKpaV lltAiJLaKa EIvCll YpoundVlK(j) avID)JaAoc A crneuro[pal Suu6-rtTOVTal et~ 1t0AAa ptpl1 t]IqlIlV~OvtlaquoL SEUtEPEUOvtE~ I(WOOl napatT)PoOvtal cruVStoE l~ )J ela1o TGW PpoXl6vwv o()rroe ooalE Ku8fcrtatlll oualCoAOe fI ltvayv(i)pIUl e Tfl e 6AT)C oOJlfK

H crnetpoEl8ilc 00)J1I tou faAaliou ltTCooioEtUl KClla npoot-yshyy~cnv lmO ~lde Ol1tAfl~ Ao(aple)J~Ki1e crnEipoc (EX 6) Tflc 0shylto(a~ EKaotOe PPClXirov hEL eurollcrromv Tfl~ )JoPltPi1~

ffiQlr = qe

fv8a r cp ElvaL 1tOIKat CUVtE1Cty]IEVQL I(al q m crra8Epai rlllv 61t0irov at TllJat ElvCll q = 35 kpc m -- 01 1 At o1tEipal cruanElpOOvtal ICllto nlv oleu8uvmv TIl l TCcplcrrpOIPi1c TOD raAa~iou Rept 16 -=tvrpov TOU Ll onola oUIlni1lrEI )Jpound Tilv lCishyvT)otv l(l)v OEllC1GlV TOO lOp0Aoyiou_ Ele -n)V ItEpi1troootv autf)v tYOjleuroV On ot crndpat hovtol To 1t6xoe 1IllV onelp(l)v l(a8EshytClX Rp6~ 10 YOAa~lOK6v euroTCml)ov elVOl SOO pC tvr6e QTCOcrr6shycrEWlt 10 kpc tvcent O~ciVEl Ete ~E(aAudpru altocrtaaEl~ b toD tltpoundvtpOU toO foAalfou TeuroAolt n61t6crtacnc )JEla~u tlllv OTCpound1shypGw Elvol 1(0ta iJ-Ccruv Opov 2 kpc

npotAcuou Mol ~IQTf)Pllou TWV Inpoundlpwv

or OTCElpOE tOeIe yoAa1im aROtEAol)V 10 SOOIo tOl crUVOAOU tlllV yaAa~lrov EI( 101) 01Y(KEVTjXI)8tvtoe 6A11C0D RPOlClnnEl Oll at oltEipOl TCapouoLCiCouv 1tOAAaC aVOO)Jata~ IJtlCpo ii j1euroshyYaAa KEVC OtCllC)ClociloEle Kai l)wTcPEuOVTOe KA6S0lX Kat ItshyrEpa xapal(tT)p lOlLlCa EI Ta IJtlQ~U t(l)v Cn poundL pltilv l)lQOtf)j1010 OOtux a lCClVWV KClra t6v 6TCoiov 6 ltApoundov KOIV6~ tU1tOe rGlv

OTCE~POElC5Glv yaAa~tGlv ~XEl S60 IOJptClX onelpac ltapouauitampt noAMie ~aIPeaELlt Kala 10V OOTllO t)JlOU TGlv Citetpopoundlodlv ya~lrov hEL TCEPlOOOTpoundPru ((1[6 Suo ortelpae Ev ToamprOte 01 1toAAaTCoi j3paxovElt IPalvEtul l5Tt ertlKpatOUV ]I6vov etc ta poundlrotEPlKCt tllilllatCl tGlv yako~la)V poundIQ ete TO poundOOOtEPIKO )JEp TCaplltT)Po)VlOt tv YpoundVEl OUO OlaKpoundKpl]ltval crTCElplll

H 9EooPT)TIKf) fPEUva tfle OItElPOeIOo)( OO)Jie loD raAo1lou ocpelAEl yo OE~IEAlOUltll tnt tUlV OEOOIJEVWV lampV 1IapalllPllcrEroV ~O)JCIX napa nlv (tCllJAOyOV ltPOOSOVlO unapxov OAlIeOV oev SiSel IlCaVOTCOlT)llKJV anavlT)clv el~ 10 pacnl(ov tPlti)[T))Ja noiov eIval 10 OnElpOElote ltp61U1tOV t6 01totov krXuEl ElO 10V ra1a~iav lJa~ H a1t(lvtllOl~ aotf) ltva)JpoundvElllL K)piro~ lt1t6 TOO~ paSlacrtpov61J0ult

H npoonftOrla poundp]l T] vpoundtolt lii~ CTCElPOeurolOODlt OO]lfje l)Lci lGlv )JOYlllUGlV ntl)irov aneOElX8T] npo oEKoneVtapoundtlw 1teplnou QVpoundTCOpl(1)e E1IEll)f) 6)JWlt oi )JayvT)lIKai l)uv6~ele opoOv )J6vov tltt to 10V0JlEVOU aepiou Elval np0(j)avpoundc Ott 10 ]IayvnTIKD nESa poundmopoDv ete If)V lCiVllOlV ToD 6Ep(OU Kai OlO)JOpltp(i)vouv ete ~IKpaV l(Al)JaKo tflV crnElPOEO~ OOIJt1V t oD raA~tou

H aveTCIlpKElll tampv ]Ia(VT)TlKi)v TCESirov Sui tilv poundp)Jl1vEpoundav ti)v a1lelpWv dC jleyaAT)v lCi~aKa Ggtl)nYllOE toult tPEUVtCt~ ete aeropiae PocnCo~ltvae trti trov OUVQptCllV ~OPUTlltO~ T6 6poundshyplOY lCal fI ICOVI ~ aItOTEhoDv )JOAle Ta 3 Tfje 6AT]lt )JatT)e poundv6e OTCEIPoelSoolt yaoliou EItpoundlOf) 01 elt TampV ltat tprov QalCOUJlEval OUVQJlEIO j3apUTT)TOlt dVOl OtIyxp6VC1llt Kai al ICUpl(i)l epai SuvashyJlEIC at tvtpyoooat tTCl t oD 6Eplou bEtal 6tl ol OUVaIJEIC Paputl1tolt elval at TC)JOV tnuepaTeuroCTEpm ete 10V faAoshy~LOV Kai OUVf1tW QOKOQV npoon-lgtOVlO pOAOV etc tflv av6nT)shy~LV Kat l~V Ihal11PllOlV li)V CJ1teurolpdlv KaTCt TT]V leuroAfUTa[ov OeuroKaC1Lav poundKl)l1AoDTal ]Iio ao~avo~tvl1 1tPOt[j11101C rtp6e l(u OUVQ]IeuroI~ papUtT)lO~ Sl(i If)V tp~velav TTje onElpopoundll)OUlt 6o~~

H l)latfpT)crle TGlV OnElpG)v Ola lleyaAO XPOVIICQ oloOtil]loTa oTColEAei eurov ~O(1lI(OV Rp6Ph11Jla EQv al middotO1[Elpal anoleAOOvtCtl 1IQV10n ono TOOt [Sioo aOttpae T61E A6y~ If)~ SLQqlOPlKije 1tEPlcrtPOtpT( OcpdAl)UV olaplCUle va aucrnEtpoDVTal Kal 1tpashyKllKWe va tiulOaV~ooVlol dc xp6vov )JLICPOlpoundPOV lGlv 005 Tfic flAlK(a~ TOU raAu~iou H ~nap~l~ 6]100 )JCY6AoU ap19]1oD CJrteuroIPOEIOGlV yaAa~Lampv )Jpound ]IlKp6v apl9)J6v crTCElpltilv KOl CXEtlshyK~ oAiyae 1tf(HpoundAlCEIe OUvnyoPeurot OTCtp lfje olatT]PilCEroe lroV crneuroIPUlV 0 Jl6voC tp6no~ TCapal(6~IVpoundro e llie tv A6yctl oumcoshyMolt poundIvai va Oex8UlfiEV 6n a anEipal Spoundv QTCOtEAODvtal mivshyTOle tIC TO) autoD UllICOU QAA chl 01 ocrttpEe lCal la vtl4gtT] aEshypiou l)ltpxoVtal IlEcrw l WV a-netpampv 6TCOU OJlroe napaJleurovouv neshyptCJaolEpov xpovov TCOP Oll poundl 10 )JE10~U lUlv CJnElp6gtv l)lashyaTl1j1a ETCoptvcolt lCae tlCacrTv ollYJlliv al crndpm anOTEshyAoDv TO )t(IOla 1tUICVOTl]lOe lflc UAT)e I(ot o uvE1tlOe l)tv e[val cruV-9Ele OAlKOI ~paxioveuroc a)Jd KU ~ OT 0 nUl( v 6111 T 0 e laquodensity waVes )

H 9Ewpia TlOv KUJJ6troV nUKv6tT)toC oletu1tw9 6PX1KG)lt il1t6 100 B Lindblad 6 61tOfolt tni noUu Etn fllO CXeuroli6v 6 IJOVO~ tPEUVT)TiJe uaxoAou~evo~ cruaTT]llatllC6gtlt ]It tflv )JeAttT]V ti1e crlteurolPOElool)e oO)Jfje lfl pOT)9elQ Tlilv tA~IKG)V 8UVU]IEroV H crVYXPovolt Uv6TCtUIC Ti1e 9eurowpiae l UlV KU)JQtrov nUlCVOtT)lOe OqleuroiAElaL Ei~ T6v cc Lin E~ 0 Lindblad IJEAElj) tlie t1tlshySp6CEle trov KU~uilroV 1tulCv61T)10C t1tl JlEjJOV())IJpoundVooV TPOx~Glv acTpoundpoov6 Li n t~eT6~Et pacrIKGle nlv Cuv6PlllolV I(aravo]lfe laquodistribut ion functioOraquo n oTCoia ElVOl auvapTllcne lfle Otshyoeroe Kat rij~ taXUtTJ1~ Kat SlSEl TflV 1tUKv6111ta ete 16v Xi)shypov tGlv cpltlOEWV YTC6 tflv ~OPCPT]v aorilv t6 1tp6pAll~a oLashynmoOtal cracpE(JtEpoV a( Opound )UOEle tOU 1tapolxn6lolv [ola[shytEpOV UOTPOVOJlIICOV tvolaqleuropov

To OTCElpouote OUvalJllCOV 1fESiov 100 Lin to onoiov 1(08 tshyKCrCTtT)V OlLYlJl1V iXEl tflv ~Opqlllv OITCATje AO(apleIJ11CijC (J1tEtshypru TCEPlcrrptqlETal )Jt ola9Epciv yooV IOlClIV tOXinT)la 11 611010 tlvOl tv ytvtl IJlK po-repa tt~ 6(pElAO)JEV11e ete tt1v OlaqlOpllCl]V TCEPlOtPO~f)v 100 yoAa~iou w ATCa~ Koi olJwupYl]9t1 to (J1tElshyPOEll)tc mUTO ml)(ov 1tapa~euroVEl atgttOSlalwvLt6~EVOV l)lCL 1(0shyraAA~AOU l)~ tKA0YTle ti1~ raxutT)ro~ 1teuroPlcrTpOCPfle rou 1tPOshyIClnttOUV l)uo O1tpoundIPoeloeie ppaxiovpounde ot OTCoTol TCapouCIwOUV TCOAAO XOPOK1T)PLO tLKo yV(Opia)Jala lUlV crnElpoell)ltIlv yaAashy~lampV 0 Lin EupfolCel on o( 1toUortAof ppaxiovElt anOteAOOv tv tvl)Ex6)JEVQV 10 6TCOtov 8uva1m va oUJlPti Elc ra tlrolEPlKo ~poundpT) tol) oAo1iou Eni 1tAtov ot IpaxiovEe otv tKTElVOVtal 1teuropav tflC CrltOaT6CECagt ~KEtvllC tK ToD KevtpOU ToD YaAa~(ou

61

~x 1 Tric rr4Gc~ f~ ~~poundUJ tN aOOt-~utlff) dJrotEmiddot AotJeO1 lE 120(JOfl (1Wftculwp Td o)1l)i If~kJfJr t1nd nu Prefldlrgostl JJUtr Jl(ttl QUirk TI PDTfJ~ INxrDJIUdli7 vort middot

iO)IIt7TM amp nl tlQXoIXj KattUTTlWEW (decentttcent) dtjluvtlQmiddot )mY-Ut ctlo trolArtJ~ watl xa doo tueMUtol fJeaxlo1Pe (piOIh) e (~~ ~u pOll IMJ aXlJlcnrafJQ~ d-Wl1l~rrallftu 11lt1 ra flOli t4n )UIIT(llkt)- atJpntOOowa~ liE mlo tIJfBI)U (~a)

6rroo tatl)r11C rupurrpofC 1oQ aJttlp061ampJU~ luoiou oOi)ta llt ttiv OlllCJIOpucijv 1ttPIOtPOCP~V Al OtmlI Orto~ ul 6Uo ra shyxUf111~ ltVQvtUl tacu llvnatOxouv mOuv(ik cl [4 1t$P~Oshylilt lho1OatrllI taW 01[11 pQv ul $wuvnu va tupt900v b tQIo fpurtoYpaqnGw Ui) (alo~l(i)v Tn 1CJato IfUaVOtf[tOl UIJ ltpaIshyvultu w t1ltllonv c1 ni cPQIB IA~ rlaquo yw~wv Evrol)(la 6tov va 0TlJUUD6-a On 6mpla togt lin 5tv QVoptpt11 _00 611shylnooP1thcll t6 OltamppotS~ uOtov KW sola EtVat ft 4Plldj (dna orunoup-((~ tou

f dlturT1J~~ tampv taxutat(i)Y i)poundKtpovu(i)v liulpcOVllTG)v efdshyPC Tltv 9ogtpnilv ~uT~ riq t~)~ tv~ yulallou iwgtrV-oU)ltvou 60 6Ka~ XMil6at dcntpwv 11 ~U~ toO (J)aftUjaf~ 6no)o-ylCuut OtaOuu~6 bm 100 OUPBlM1TOO

Kal drrotl)1tOtJU1l 4P(IYrOypaqHKcb ~ hdltnote lJopcp1l tau T6 be Eo) m16)ou taw qgtQJotoypaql(i)y 7tUPIlYOJuVOY K VfljurtoypnQ)L shyCO fll)p8t3cl JttlPQ4TUtUct clilrova t1t ~el~E(I)tofyaa~lo) EI 6 IU)l~6movTI BCJ41poundIat 01 PrcfidpsMlIer u Quirk mrapouataaav ltv fOlO1)tOV tpll TO 6notov OflHovilBl v ~~hshyIlv 20000 11Ephrou aco~TL(I)v Til (1(Il~6no dvaL dpXlKamp 6pomshyjl6p ltBravqgtn- tnl tva 1~d50u o(ou crn)lP ~middot pooJtat oe KIlW TOIOCJtO~ rp6rrov amperrpound VIi 9aopoClvrtu w laquoVEtpTl

hplooraquo Et~ kamov afl ju[oV fOO 6tOKW 1Jt0ll roXJfJll ni)v vtuw dwn apx~ 0 fIlJlctu rfI~ ttJt(uTOUJamptvJ1~ T41xUtTrro amp01E II dvarrtooooJli1rll quyolCpoundvrpO( Suvallt~ It (aoOtut jJt Tltv Qvrlao~ov Vov TIl IlupuT11r~ Ev lt0 ~ElI~ t oO

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The investigation of the Galactic spiral structure By B Barbanlmiddot

Summary

Tho oJTur ts for the tfacing of til t) ~Il i ra) s truclurl (our Milky -8Y Syslrm the op tical ond rudi r nHlbds used (or lIlo II Ufly or tho s-p lraJ a rmli ond Ihu th)lflnmiddotu tlonaJ dala are initiA ll y prMtl ntd

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