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THE ASTROPHYSICAL JOURNAL Founded in 1895 by George E. Hale and James E. Keeler HELMUT A. ABT JOHN S. GALLAGHER III A. DALGARNO EUGENE H. AVRETT Managing Editor Associate Managing Editor Letters Editor Deputy Letters Editor Kitt Peak National Observatory AURA, Inc. Center for Astrophysics Center for Astrophysics YERVANT TERZIAN VIRGINIA TRIMBLE F. DAVID A. HARTWICK MICHAEL JURA EDWIN E. SALPETER Associate Editor Associate Editor Associate Letters Editor Associate Letters Editor Associate Letters Editor Cornell University University of Maryland and University of Victoria University of California, Los Angeles Cornell University University of California, Irvine AAS PUBLICATIONS BOARD CATHERINE PILACHOWSKI (1989-1992), Chairperson Kitt Peak National Observatory FRANCOIS SCHWEIZER (1990-1993) JACQUELINE H. VAN GORKOM (1990-1993) JAMES W. LIEBERT (1991-1994) Carnegie Institution of Washington Columbia University University of Arizona KRISTEN SELLGREN (1991-1994) H. J. G. L. M. LAMERS (1992-1995) HUGH M. VAN HORN (1992-1995) Ohio State University SRON Laboratory for Space Research, The Netherlands University of Rochester Production Manager: TuLIE O’CONNOR Chief Manuscript Editor: GERALDINE BRADY Manuscript Editors: WALTER G. GLascorF III, BETH GARRISON, KAREN LESLIE BoypD, THAD A. Doria, AND Davip E. ANDERSON Production Staff: EuizABETH HUGHES, GRACE S. WHITE, IVAN BRUNETTI, AZISTI DEMBOWSKI, AND VIRGINIA M. BoycE VOLUME 394, PART 1 1992 JULY 20 AND AUGUST 1 PUBLISHED BY THE UNIVERSITY OF CHICAGO PRESS FOR THE AMERICAN ASTRONOMICAL SOCIETY © 1992 BY THE AMERICAN ASTRONOMICAL SOCIETY. ALL RIGHTS RESERVED. PUBLISHED THREE TIMES A MONTH COMPOSED BY SANTYPE INTERNATIONAL LIMITED, SALISBURY, ENGLAND PRINTED BY CAPITAL CITY PRESS, INC. MONTPELIER, VERMONT, U.S.A. THE ASTROPHYSICAL JOURNAL CONTENTS OF VOLUME 394, PART 1 1992 JULY 20, Number 1 MODELS FOR GALAXY HALOS IN AN OPEN UNIVERSE Simon D. M. White & Dennis Zaritsky CAN NEUTRINO DECAY-DRIVEN MOCK GRAVITY SAVE HOT DARK MATTER? Randall J. Splinter & Adrian L. Melott THICK STRINGS, THE LIQUID CRYSTAL BLUE PHASE, AND COSMOLOGICAL LARGE-SCALE STRUCTURE Xiaochun Luo & David N. Schramm A PHYSICAL INTERPRETATION OF KALUZA-KLEIN COSMOLOGY Paul S. Wesson LARGE-SCALE RADIAL VELOCITY CORRELATIONS AS A TEST OF GAUSSIAN INITIAL CONDITIONS Stephen D. Landy & Alexander S. Szalay ON DISTANCES AND THE HUBBLE PARAMETER DETERMINATION IN GRAVITATIONAL LENSES 128-E1 Kazuya Watanabe, Misao Sasaki, & Kenji Tomita GRAVITATIONAL LENSING OF QUASARS AS SEEN BY THE HUBBLE SPACE TELESCOPE SNAPSHOT SURVEY 128-F6 D. Maoz, J. N. Bahcall, R. Doxsey, D. P. Schneider, N. A. Bahcall, O. Lahav, & B. Yanny HUBBLE FLOWS IN THE PISCES-PERSEUS REGION FROM THE GIOVANELLI-HAYNES GALAXY SAMPLE 128-G5 T. Ichikawa & M. Fukugita THE UNUSUAL FIELD OF THE QUASAR 3C 336: IDENTIFICATION OF THREE FOREGROUND Mg 1 ABSORBING 129-A13 GALAXIES Charles C. Steidel & Mark Dickinson HIGHER ORDER CORRELATIONS OF JRAS GALAXIES 129-B6 Avery Meiksin, Istvan Szapudi, & Alexander Szalay THE KINEMATICS OF THE EXTENDED GAS IN THE SEYFERT GALAXY NGC 3516 129-B11 John S. Mulchaey, Zlatan Tsvetanov, Andrew S. Wilson, & Ismael Pérez-Fournon LINE PROFILE AND VARIABILITY DATA TO PROBE THE BROAD-LINE REGION GEOMETRY: OF DISKS AND NESTS 129-C6 F. Mannucci, M. Salvati, & R. M. Stanga THE STRUCTURE OF NGC 4565 AT 100, 160, AND 200 MICRONS: CONTINUUM DUST EMISSION IN A QUIESCENT 129-C13 Sb GALAXY G. Engargiola & D. A. Harper HYDROMAGNETIC DISK WINDS IN YOUNG STELLAR OBJECTS AND ACTIVE GALACTIC NUCLEI 129-D13 Guy Pelletier & Ralph E. Pudritz A 2.18 TO 2.28 MICRON STUDY OF THE STELLAR POPULATION IN THE NUCLEUS OF M82 129-F9 Niall I. Gaffney & Dan F. Lester A MULTIWAVELENGTH STUDY OF THE SUPERNOVA REMNANT N49 IN THE LARGE MAGELLANIC CLOUD 130-Al Olaf Vancura, William P. Blair, Knox S. Long, & John C. Raymond COSMIC-RAY SECONDARY ANTIPROTONS: A CLOSER LOOK 130-B10 Thomas K. Gaisser & Robert K. Schaefer VISCOUS AND INERTIAL EFFECTS AT COSMIC-RAY SHOCKS J. R. Jokipii & L. L. Williams ANOMALOUSLY HIGH APPARENT ABUNDANCES OF SINGLY IONIZED HELIUM IN THE GALACTIC H nu 130-C13 REGION W3A P. R. Roelfsema, W. M. Goss, & D. C. V. Mallik CONTENTS SURVEYS OF DENSE CORES FOR HIGH-VELOCITY GAS Yuefang Wu, Shudong Zhou, & Neal J. Evans II IN SEARCH OF EVIDENCE FOR PROTOSTELLAR COLLAPSE: A SYSTEMATIC STUDY OF LINE FORMATION IN LOW-MASS DENSE CORES Shudong Zhou ON THE ROLE OF RADIOACTIVE DECAYSI N POWERING GAMMA RAYS AND X-RAYS FROM NOVAE 130-F5 Mario Livio, Apostolos Mastichiadis, Hakki Ogelman, & James W. Truran PLANAR H,0 MASERS IN STAR-FORMING REGIONS 130-F10 Moshe Elitzur, David J. Hollenbach, & Christopher F. McKee A SPECTROSCOPIC DETERMINATION OF THE MASS DISTRIBUTION OF DA WHITE DWARFS 130-G5 P. Bergeron, Rex A. Saffer, & James Liebert TIDAL DISTRUPTION OF A STAR BY A MASSIVE DISK (THE AXISYMMETRIC ROCHE PROBLEM) John W. Woodward, Srivaths Sankaran, & Joel E. Tohline SUPERSONIC INFALL AND CAUSALITY IN ACCRETION DISK BOUNDARY LAYERS 131-B10 Robert Popham & Ramesh Narayan A FLUX-LIMITED MODEL OF PARTICLE DIFFUSION AND VISCOSITY 131-C3 Ramesh Narayan THE ROLE OF THE DWARF NOVA PERIOD DISTRIBUTION IN UNDERSTANDING THE EVOLUTION OF 131-C12 CATACLYSMIC VARIABLES Allen W. Schafter COLUMN ACCRETION WITH RADIATION DRAG AND THE TWO-BRANCH SPECTRUM OF THE LOW-MASS X-RAY BINARY GX 5-1 J. H. You, T. Lu, C. Y. Wei, & T. G. Wang THE COOLEST DA WHITE DWARFS DETECTED AT SOFT X-RAY WAVELENGTHS K. M. Kidder, J. B. Holberg, M. A. Barstow, R. W. Tweedy, & F. Wesemael HOT POST-ASYMPTOTIC GIANT BRANCH STARS AT HIGH GALACTIC LATITUDES R. J. H. McCausland, E. S. Conlon, P. L. Dufton, & F. P- Keenan SELF-CONSISTENT MODELS OF WOLF-RAYET STARS AS HELIUM STARS WITH OPTICALLY THICK WINDS 131-F13 Mariko Kato & Icko Iben, Jr. EVOLUTIONARY MODELS AND THE p-MODE OSCILLATION SPECTRUM OF a CENTAURI A AND B Peter Edmonds, Lawrence Cram, Pierre Demarque, D. B. Guenther, & Marc H. Pinsonneault SO AND SO, IN MASS-LOSS ENVELOPES OF RED GIANTS: PROBES OF NONEQUILIBRIUM CIRCUMSTELLAR CHEMISTRY AND MASS-LOSS RATES Raghvendra Sahai & Peter G. Wannier DETECTION OF FUNDAMENTAL AND HARMONIC TYPE III RADIO EMISSION AND THE ASSOCIATED 132-B12 LANGMUIR WAVES AT THE SOURCE REGION M. J. Reiner, R. G. Stone, & J. Fainberg PROPAGATION CONDITIONS OF RELATIVISTIC ELECTRONS IN THE INNER HELIOSPHERE 132-Cll1 M.-B. Kallenrode, G. Wibberenz, & S. Hucke DISSIPATION OF MAGNETIC ENERGY IN THE SOLAR CORONA Allen H. Boozer THE GALILEO AND PIONEER VENUS ULTRAVIOLET SPECTROMETER EXPERIMENTS: SOLAR LYMAN-a LATITUDE 132-D11 VARIATION AT SOLAR MAXIMUM FROM INTERPLANETARY LYMAN-a OBSERVATIONS W. R. Pryor, J. M. Ajello, C. A. Barth, C. W. Hord, A. I. F. Stewart, K. E. Simmons, W. E. McClintock, B. R. Sandel, & D. E. Shemansky ABSTRACTS OF THE ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1992 AUGUST Active GALacTic NUCLEI WITH ULTrasorr X-Ray EmIssION F. A. Cordova, J. F. Kartje, R. J. Thompson, Jr, K. O. Mason, E. M. Puchnarewicz, & F. R. Harnden, Jr. X-Ray LUMINOSITY AND SPECTRAL VARIABILITY OF HARD X-Ray-SELECTED AcTIVE GALACTIC NUCLEI P. Grandi, G. Tagliaferri, P-G iommi, P. Barr, & G. G. C. Palumbo THE SPECTROSCOPIC AND PHOTOMETRIC EVOLUTION OF NOVAE IN THE BULGE OF M31 Austin B. Tomaney & Allen W. Shafter A HomocENgous CaTAloc oF New UBV anv Hf PuHotometry oF B- AND A-TYPE STARS IN AND AROUND THE SCORPIUS-CENTAURUS OB AssOcIATION Robert W. Slawson, Robert J. Hill, & John D. Landstreet CONTENTS CCD PHOTOMETRY IN THE GLOBULAR CLUSTER NGC 288. I. BLUE STRAGGLERS AND MAIN-SEQUENCE BINARY STARS Michael Bolte An IRAS Survey OF GALACTIC SUPERNOVA REMNANTS Jon M. Saken, Robert A. Fesen, & J. Michael Shull INFRARED Colors OF Low-Mass STARS S. K. Leggett HELIUM GRAVITATIONAL SETTLING IN THE ENVELOPES OF EVOLVING MAIN-SEQUENCE A AND F STArs J. Richer, G. Michaud, & C. R. Proffitt ADIABATIC PROPERTIES OF PULSATING DA Waite Dwargs. IV. AN EXTENSIVE SURVEY OF THE PERIOD STRUCTURE OF EVOLUTIONARY MoDELs P. Brassard, G. Fontaine, F. Wesemael, & M. Tassoul AN EINSTEIN OBSERVATORY SAO-BASED CATALOG OF B-TYPE STARS F. Grillo, S. Sciortino, G. Micela, G. S. Vaiana, & F. R. Harnden, Jr. A NEw LisBrRary OF STELLAR OPTICAL SPECTRA David R. Silva & Mark E. Cornell AN EXTENSION OF THE HIGH-RESOLUTION MILLIMETER- AND SUBMILLIMETER-WAVE SPECTRUM OF METHANOL TO HIGH ANGULAR MOMENTUM QUANTUM NUMBERS Todd Anderson, Eric Herbst, & Frank C. De Lucia 1992 AUGUST 1, Number 2 GRAVITATIONAL LENSING, FINITE GALAXY CORES, AND THE COSMOLOGICAL CONSTANT Lawrence M. Krauss & Martin White COSMOLOGICAL DENSITY PERTURBATIONS WITH MODIFIED GRAVITY Redouane Fakir, Salman Habib, & William Unruh DENSITY PERTURBATIONS DRIVEN BY THE IRREGULAR SPATIAL CURVATURE IN INHOMOGENEOUS COSMOLOGICAL MODELS Kenji Tomita THE MASS FUNCTION OF GALAXY HALOS IN A COLD DARK MATTER UNIVERSE T. G. Brainerd & J. V. Villumsen MULTIFRACTAL PROPERTIES OF COSMOLOGICAL N-BODY SIMULATIONS Riccardo Valdarnini, Stefano Borgani, & Antonello Provenzale REDSHIFT ASYMMETRY AND COLOR-VELOCITY CORRELATION IN NEARBY GALAXY GROUPS: EVIDENCE OF DUST? M. Girardi, M. Mezzetti, G. Giuricin, & F. Mardirossian SEMIEMPIRICAL LIMITS ON THE THERMAL CONDUCTIVITY OF INTRACLUSTER GAS Laurence P. David, John P. Hughes, & Wallace H. Tucker ELECTROMAGNETICALLY DRIVEN RELATIVISTIC JETS: A CLASS OF SELF-SIMILAR SOLUTIONS Zhi- Yun Li, Tzihong Chiueh, & Mitchell C. Begelman THE STABILITY OF QSO/AGN BROAD EMISSION LINE CLOUDS I. S. Krinsky & R. C. Puetier THE KINEMATICS OF PLANETARY NEBULAE IN THE OUTER FIELDS OF THE LARGE MAGELLANIC CLOUD E. Vassiliadis, Stephen J. Meatheringham, & Michael A. Dopita GENERAL THEORY OF THE PURCELL-PENNYPACKER SCATTERING APPROACH AND ITS EXTENSION TO BIANISOTROPIC SCATTERERS Akhlesh Lakhtakia HOT PAIR-DOMINATED ACCRETION DISKS 135-E9 Gunnilaugur Bjérnsson & Roland Svensson AGES OF GLOBULAR CLUSTERS AND HELIUM DIFFUSION i35-F12 Brian Chaboyer, Ata Sarajedini, & Pierre Demarque STAR FORMATION IN PROTOGALACTIC CLOUDS 135-G8 Douglas N. C. Lin & Stephen D. Murray CONTENTS BOW SHOCK MODELS FOR THE VELOCITY STRUCTURE OF ULTRACOMPACT H 1 REGIONS Dave Van Buren & Mordecai-Mark Mac Low MAPPING OBSERVATIONS OF SULFUR-CONTAINING CARBON-CHAIN MOLECULES IN TAURUS MOLECULAR CLOUD 1 (TMC-1) Yasuhiro Hirahara, Hiroko Suzuki, Satoshi Yamamoto, Kentarou Kawaguchi, Norio Kaifu, Masatoshi Ohishi, Shuro Takano, Shin-ichi Ishikawa, & Akimasa Masuda OBSERVATION OF FINE STRUCTURE IN THE COLD PHASE OF THE LOCAL INTERSTELLAR MEDIUM USING K 1 ABSORPTION Joaquin Trapero, John E. Beckman, Ricardo Génova, & Conal D. McKeith STATISTICS OF GAMMA-RAY BURSTS: HOMOGENEOUS SPHERICAL MODELS 136-D2 Ira Wasserman AN ANALYSIS OF RADIO PULSAR NULLING STATISTICS 136-D13 James D. Biggs ROTATIONAL PARAMETERS OF PSR 0540-69 AS MEASURED AT OPTICAL WAVELENGTHS 136-E8 Christian Gouiffes, John P. Finley, & Hakki Ogelman DETECTABILITY OF THE GRAVITATIONAL WAVE SIGNAL FROM A CLOSE NEUTRON STAR BINARY WITH MASS TRANSFER Piotr Jaranowski & Andrzej Krolak ON THE STUDY OF THE MASS RATIO OF SPECTROSCOPIC BINARIES 136-F10 Tsevi Mazeh & Dorit Goldberg EARLY EXPANSION AND LUMINOSITY EVOLUTION OF SUPERNOVAE Roger A. Chevalier TWO ULTRAMASSIVE WHITE DWARFS FOUND AMONG CANDIDATES FOR MAGNETIC FIELDS 136-G11 Gary D. Schmidt, P. Bergeron, James Liebert, & Rex A. Saffer DISCOVERY AND X-RAY PROPERTIES OF GS 1124-683 (=NOVA MUSCAE) Shunji Kitamoto, Hiroshi Tsunemi, Sigenori Miyamoto, & Kiyoshi Hayashida SIGMA DETECTION OF HARD X-RAY EMISSION FROM THE SOFT TRANSIENT TYPE I X-RAY BURSTER KS 1731 — 260 D. Barret, L. Bouchet, P-M androu, J. P- Roques, B. Cordier, Ph. Laurent, F. Lebrun, J. Paul, R. Sunyaev, E. Churazov, M. Gilfanov, A. Diachkov, N. Khavenson, B. Novikov, I. Chulkov, & A. Kuznetsov PREVENTION OF ACCRETiON ONTO WHITE DWARFS BY STELLAR WINDS James MacDonald EMISSION-LINE STUDIES OF YOUNG STARS. III. CORRELATIONS WITH THE INFRARED EXCESS Fred Hamann & S. E. Persson COMBINED INFRARED AND ANALYTICAL ELECTRON MICROSCOPE STUDIES OF INTERPLANETARY DUST PARTICLES J. P. Bradley, H. J. Humecki, & M. S. Germani THE FORMATION OF MAGNETIC CAVITIES IN COMETS 137-E10 Z. Klopman, A. Eviatar, & R. Goldstein DEVELOPMENT OF MAGNETOHYDRODYNAMIC TURBULENCE IN CORONAL LOOPS Daniel O. Gémez & Constantino Ferro Fontdn EFFECTS OF DIFFERENTIAL ROTATION ON STELLAR OSCILLATIONS: A SECOND-ORDER THEORY 137-G5 W. A. Dziembowski & Philip R. Goode MICROWAVE TRANSITION RADIATION IN SOLAR FLARES AND IN ASTROPHYSICS 138-All G. D. Fleishman & S. W. Kahler OBSERVATION OF UPFLOWS DURING SOFT X-RAY SOLAR FLARES 138-B9 J. F. Seely & Uri Feldman POLYCYCLIC AROMATIC HYDROCARBONS AND MOLECULAR EQUILIBRIA IN CARBON-RICH STARS 138-C4 Isabelle Cherchneff & John R. Barker ANALYTICAL CROSS SECTIONS AND RATE COEFFICIENTS FOR H-H INELASTIC COLLISIONS 138-D6 W. H. Soon INSTRUCTIONS TO AUTHORS i 138-E3