HOW DOES THE GALAXY WORK? ASTROPHYSICS AND SPACE SCIENCE LIBRARY VOLUME 315 EDITORIAL BOARD Chairman W.B. BURTON,National Radio Astronomy Observatory, Charlottesville, Virginia, U.S.A. ([email protected]); University of Leiden, The Netherlands ([email protected]) Executive Committee J. M. E. KUIJPERS, Faculty of Science, Nijmegen, The Netherlands E. P. J. VAN DEN HEUVEL, Astronomical Institute, University of Amsterdam, The Netherlands H. VAN DER LAAN, Astronomical Institute, University of Utrecht, The Netherlands MEMBERS I. APPENZELLER, Landessternwarte Heidelberg-Königstuhl, Germany J. N. BAHCALL, The Institute for Advanced Study, Princeton, U.S.A. F. BERTOLA, Universitá di Padova, Italy J. P. CASSINELLI, University of Wisconsin, Madison, U.S.A. C. J. CESARSKY, Centre d'Etudes de Saclay, Gif-sur-Yvette Cedex, France O. ENGVOLD, Institute of Theoretical Astrophysics, University of Oslo, Norway R. McCRAY, University of Colorado, JILA, Boulder, U.S.A. P. G. MURDIN, Institute of Astronomy, Cambridge, U.K. F. PACINI, Istituto Astronomia Arcetri, Firenze, Italy V. RADHAKRISHNAN, Raman Research Institute, Bangalore, India K. SATO, School of Science, The University of Tokyo, Japan F. H. SHU, University of California, Berkeley, U.S.A. B. V. SOMOV, Astronomical Institute, Moscow State University, Russia R. A. SUNYAEV, Space Research Institute, Moscow, Russia Y. TANAKA, Institute of Space & Astronautical Science, Kanagawa, Japan S. TREMAINE,CITA, Princeton University, U.S.A. N. O. WEISS, University of Cambridge, U.K. HOW DOES THE GALAXY WORK? A Galactic Tertulia with Don Cox and Ron Reynolds Edited by EMILIO J. ALFARO Instituto de Astrofísica de Andalucía (CSIC), Granada, Spain ENRIQUE PÉREZ Instituto de Astrofísica de Andalucía (CSIC), Granada, Spain and JOSÉ FRANCO Instituto de Astronomía, UNAM, México KLUWER ACADEMIC PUBLISHERS NEW YORK,BOSTON, DORDRECHT, LONDON, MOSCOW eBookISBN: 1-4020-2620-X Print ISBN: 1-4020-2619-6 ©2005 Springer Science + Business Media, Inc. Print ©2004 Kluwer Academic Publishers Dordrecht All rights reserved No part of this eBook maybe reproducedor transmitted inanyform or byanymeans,electronic, mechanical, recording, or otherwise, without written consent from the Publisher Created in the United States of America Visit Springer's eBookstore at: http://ebooks.springerlink.com and the Springer Global Website Online at: http://www.springeronline.com Table of Contents Preface xiii Bruce’sLetter xv ConferencePoster xvi OrganizingCommittees xvii ConferencePhotograph xviii ListofParticipants xix TheMilkyWay: FourCenturiesofDiscoveryoftheGalaxy 1 S.N.Shore GasintheDisk&Halo HICloudsBeyondtheGalacticDisk 17 F.J.Lockman TheWHAMNorthernSkySurveyandtheNatureoftheWarmIonizedMedium intheGalaxy 25 G.J.Madsen TheStructureofGalacticHydrogen ontheLargestScales 34 N.M.McClure-Griffiths,J.M.Dickey,B.M.Gaensler,&A.J.Green TheBU-FCRAOGalacticRingSurvey 39 T. M. Bania, J. M. Jackson, D. P. Clemens, M. H. Heyer, R. Simon, R. Shah, & J. Rathborne TheViewoftheInterstellarMediumwiththeCanadianGalacticPlane Survey 43 K.A.Douglas,&A.R.Taylor DarkHydrogenintheGalacticPlane 47 S.J.Gibson,A.R.Taylor,J.M.Stil,L.A.Higgs,P.E.Dewdney,&C.M.Brunt vi DiffuseInfraredExcessFeaturesintheCanadianGalacticPlaneSurvey 51 K.A.Douglas,&A.R.Taylor TheOxygenAbundanceinourGalaxy 52 L.S.Pilyugin,F.Ferrini,&R.V.Shkvarun IonizationoftheGalacticHalo 53 J.D.Slavin DiffuseIonizedGasandtheDisk-HaloInteractioninSpiralGalaxies 61 R.-J.Dettmar ArealltheDIGstheSame? 71 A.M.Hidalgo-Ga´mez RadioHalosinStarFormingGalaxies 75 U.Lisenfeld,M.Dahlem,&M.Ehle Brackett-γ LineSurveyoftheIonizedHydrogenintheGalacticPlane. 79 A.S.Kutyrev,C.L.Bennett,S.H.Moseley, R.J.Reynolds,&F.L.Roesler II LeakyH RegionsandHeliumIonizationintheReynoldsLayer 83 K.Wood,&J.S.Mathis ReynoldslayersinNearbyGalaxies: theFace–OnView 88 J.E.Beckman,&A.Zurita VolumeFillingFactorsoftheDIG 93 D.Mitra,E.M.Berkhuijsen,&P.Mu¨ller i LatestResultsoftheSETH SurveyatArecibo 97 E.J.Korpela,P.Demorest,E.Heien,C.Heiles,&D.Werthimer Job Accomplished? The Escape of Ionizing Radiation from the Disks of Spiral Galaxies 101 M.Castellanos,D.Valls-Gabaud,A.I.D´ıaz,&G.Tenorio-Tagle vii ModelingtheDiffuseIonizedGaswithCloudy 102 T.Elwert,&R.–J.Dettmar DiffuseIonizedMediumPanelDiscussion 103 R.J.Reynolds,R.L.Shelton,S.L.Tufte,&therestofthe“tertulianos” Gas Dynamics AbsorptionLineStudiesintheHalo 129 P.Richter DynamicalEvolutionofHighVelocityCloudsintheGalacticHalo 136 C.Konz,G.T.Birk,&H.Lesch PulsarBowShocksasProbesofWarmNeutralGas 141 B.M.Gaensler,B.Stappers,S.Chatterjee,P.Ghavamian,D.H.Jones,&J.Cordes HighlyIonizedHVCstowardsPKS2155–304: GalacticorExtragalactic? 146 J.A.Collins,J.M.Shull,&M.L.Giroux TowardsanUnderstandingoftheDynamicsoftheMilkyWay 147 K.Hachisuka,&M.Miyoshi FUSEObservationsofOVIEmissionfromtheGalacticFountain 148 B.Otte,W.V.Dixon,R.Sankrit,&M.Bonamente PatternSpeedsofThreeSpiralsUsingCOandtheTremaine-WeinbergMethod 149 R.J.Rand,P.Zimmer,&J.T.McGraw GasInfallontotheSuperthinIC2233 150 L.D.Matthews,&J.M.Uson High-VelocityGasObservedtowardstheShajn147SupernovaRemnant 152 S.Sallmen,B.Y.Welsh,&R.Lallement Hot Gas HotGasintheGalaxy 155 W.T.Sanders viii BubblesandSuperbubbles 165 Y.-H.Chu,M.A.Guerrero,&R.A.Gruendl TheChandraViewofM101: WhatCanWeLearnAbouttheMilkyWay? 173 K.D.Kuntz FUSEObservationsoftheVelaSupernovaRemnant 177 R.Sankrit CircumstellarInteractioninYoungRadioSupernovae 181 M.A.Pe´rez-Torres,&A.Alberdi ChandraArchiveofNearbyGalaxies.I.NormalGalaxies 186 C.-H.R.Chen,S.Wang,M.A.Guerrero,Y.-H.Chu,&R.A.Gruendl HIShellsinthe2ndGalacticQuadrant 187 S.Ehlerova´ KeyScienceProgramsfortheSPEARMission 188 E.J.Korpela,J.Edelstein,K.Nishikida,B.Welsh,K.–W.Min,W.Han,K.–I.Seon,& D.–H.Lee ChandraArchiveofNearbyGalaxies.II.GalaxieswithNuclearActivity 189 S.Wang,C.-H.R.Chen,M.A.Guerrero,Y.-H.Chu,&R.A.Gruendl HeatingandCoolingintheISM(PanelDiscussion) 191 T.W.Hartquist,&J.Raymond TheStellarComponent TheGalacticCentreanditsBlackHole 201 R.Scho¨del,&R.Genzel StellarMetallicitiesandtheFormationoftheGalacticBulge 209 I.Ferreras,R.F.G.Wyse,&J.Silk TheGalacticBar 213 R.Fux StellarDistributionintheGalacticDiskfromNIRColor-MagnitudeDiagrams 221 A.Cabrera-Lavers,F.Garzo´n,&P.Hammersley ix StellarClustersintheNucleusofGalaxies 225 R.M.Gonza´lez–Delgado MassiveYoungClusters 231 J.Ma´ız–Apella´niz DeepMulticolorNIRSurveyoftheGalacticPlane 240 A.Cabrera-Lavers,F.Garzo´n,B.Vicente,&P.Hammersley TracingtheHistoryoftheGalaxywithGlobularClusters 241 F.R.Ferraro TidalDebrisintheGalacticHalo 249 D.Mart´ınez-Delgado StarFormationinHigh-RedshiftISM 257 A.M.Wolfe GasInflowinSpiralGalaxiesfromKiloparsectoParsecScale 265 W.Maciejewski OpenClustersasTracersoftheCygnusArm 269 A.Marco,&I.Negueruela TriaxialBulgeandIn-PlaneBaroftheMilkyWay 271 S.Picaud TidalShocksonGlobularClusters 272 S.Leon,L.Verdes-Montenegro,G.Bergond,G.Meylan,&F.Combes EvolutionofGlobularClusterPopulationsinCompactGalaxyGroups 273 S.Leon,J.Perea,A.Athanassoula,G.Bergond,G.Meylan,A.DelOlmo,&G.Garc´ıa– Go´mez NearIRColor–MagnitudeDiagramsofBulgeGlobularClusters 274 E.Valenti,F.R.Ferraro,&L.Origlia MagneticField&Plasma MagneticFieldsintheMilkyWayandOtherSpiralGalaxies 277 R.Beck