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THE ASTROPHYSICAL JOURNAL CONTENTS OF VOLUME 549, PART 1 2001 MARCH 1, NUMBER 1 MEDIAN STATISTICS, H,, AND THE ACCELERATING UNIVERSE J. Richard Gott III, Michael S. Vogeley, Silviu Podariu, & Bharat Ratra DEPROJECTING SUNYAEV-ZELDOVICH STATISTICS Pengjie Zhang & Ue-Li Pen THE ROLE OF HEATING AND ENRICHMENT IN GALAXY FORMATION Evan Scannapieco & Tom Broadhurst THE SEARCH FOR COSMOLOGICAL BLACK HOLES: A SURFACE BRIGHTNESS VARIABILITY TEST Geraint F. Lewis & Rodrigo A. Ibata ABUNDANCES AND EVOLUTION OF LITHIUM IN THE GALACTIC HALO AND DISK Sean G. Ryan, Toshitaka Kajino, Timothy C. Beers, Takeru Ken Suzuki, Donatella Romano, Francesca Matteucci, & Katarina Rosolankova CAN HEAVY WIMPs BE CAPTURED BY THE EARTH? Andrew Gould & S. M. Khairul Alam OBSERVATIONS OF Lya ABSORPTION IN A TRIPLE QUASAR SYSTEM P. A. Young, C. D. Impey, & C. B. Foltz UVES OBSERVATIONS OF QSO 0000—2620: ARGON AND PHOSPHORUS ABUNDANCES IN THE DUST-FREE DAMPED Lya SYSTEM AT z,,, = 3.3901 Paolo Molaro, Sergei A. Levshakov, Sandro D’Odorico, Piercarlo Bonifacio, & Miriam Centurion PREHEATED ADVECTION-DOMINATED ACCRETION FLOW © Myeong-Gu Park & Jeremiah P. Ostriker FRACTAL QUASAR CLOUDS Mark Bottorff & Gary Ferland ON THE ORIGIN OF INTRINSIC NARROW ABSORPTION LINES INz<1QSOs © Rajib Ganguly, Nicholas A. Bond, Jane C. Charlton, Michael Eracleous,W. N. Brandt,& Christopher W. Churchill WHERE IS THE [O m] 24363 EMITTING REGION IN ACTIVE GALACTIC NUCLEI? © Tohru Nagao, Takashi Murayama,& Yoshiaki Taniguchi THE GALAXY POPULATIONS OF X-RAY-DETECTED, POOR GROUPS © Kim-Vy H. Tran, Luc Simard, Ann I. Zabludoff, &J ohn S. Mulchaey ORBITAL STRUCTURE OF TRIAXIAL BLACK HOLE NUCLEI M. Y. Poon & D. Merritt THE FORMATION OF BROAD-LINE CLOUDS IN THE ACCRETION SHOCKS OF ACTIVE GALACTIC NUCLEI Michael J. Fromerth & Fulvio Melia THE INFRARED SPECTRAL ENERGY DISTRIBUTION OF NORMAL STAR-FORMING GALAXIES © Daniel A. Dale, George Helou, Alessandra Contursi, Nancy A. Silbermann, & Sonali Kolhatkar TEMPERATURE MAP OF THE VIRGO CLUSTER OF GALAXIES OBSERVED WITH ASCA R. Shibata, K. Matsushita, N. Y. Yamasaki, T. Ohashi, M. Ishida, K. Kikuchi, H. Bohringer, & H. Matsumoto ON THE ORIGIN OF FAINT INTRACLUSTER STARLIGHT IN COMA Vladimir Korchagin, Toshio Tsuchiya, & Shoken M. Miyama BEPPOSAX OBSERVATIONS OF THE MASER SEYFERT 2 GALAXY ESO 103-G35 Belinda J. Wilkes, Smita Mathur, Fabrizio Fiore, Angelo Antonelli, & Fabrizio Nicastro THE NUCLEAR STELLAR CLUSTER IN THE SEYFERT 1 GALAXY NGC 3227: HIGH ANGULAR RESOLUTION NEAR-INFRARED IMAGING AND SPECTROSCOPY E. Schinnerer, A. Eckart, & L. J. Tacconi ili CONTENTS 47 TUCANAE: THE SPECTROSCOPIC VERSUS COLOR-MAGNITUDE DIAGRAM AGE DISCREPANCY Alexandre Vazdekis, Maurizio Salaris, Nobuo Arimoto, & James A. Rose THE FUSE SPECTRUM OF PG 0804+761: A STUDY OF ATOMIC AND MOLECULAR GAS IN THE LOWER GALACTIC HALO AND BEYOND Philipp Richter, Blair D. Savage, Bart P. Wakker, Kenneth R. Sembach, & Peter M. W. Kalberla ELECTRON-POSITRON ANNIHILATION RADIATION FROM SAGITTARIUS A EAST AT THE GALACTIC CENTER Marco Fatuzzo, Fulvio Melia, & Johann Rafelski A NEW MODEL FOR THE EVOLUTION OF LIGHT ELEMENTS IN AN INHOMOGENEOUS GALACTIC HALO Takeru Ken Suzuki & Yuzuru Yoshii COSMIC-RAY SOURCES AND SOURCE COMPOSITION C. H. Tsao, R. Silberberg, & A. F. Barghouty STRUCTURE OF THE GALACTIC STELLAR HALO PRIOR TO DISK FORMATION Masashi Chiba & Timothy C. Beers EVOLUTION OF O ABUNDANCE RELATIVE TO Fe Y.-Z. Qian & G. J. Wasserburg LEAD: ASYMPTOTIC GIANT BRANCH PRODUCTION AND GALACTIC CHEMICAL EVOLUTION Claudia Travaglio, Roberto Gallino, Maurizio Busso, & Raffaele Gratton MODELS OF VERTICAL DISTURBANCES IN THE INTERSTELLAR MEDIUM Michaei A. Walters & Donald P. Cox IRREGULAR MAGNETIC FIELDS IN INTERSTELLAR CLOUDS AND VARIATIONS IN THE OBSERVED CIRCULAR POLARIZATION OF SPECTRAL LINES W. D. Watson, D. S. Wiebe, & R. M. Crutcher THE FORMATION OF STELLAR CLUSTERS: GAUSSIAN CLOUD CONDITIONS. II. Ralf S. Klessen & Andreas Burkert TRANSPORT PHENOMENA IN STOCHASTIC MAGNETIC MIRRORS Leonid Malyshkin & Russell Kulsrud FAR ULTRAVIOLET SPECTROSCOPIC EXPLORER OBSERVATIONS OF AN X-RAY BRIGHT REGION IN THE VELA SUPERNOVA REMNANT Ravi Sankrit, Robin L. Shelton, William P. Blair, Kenneth R. Sembach,, & Edward B. Jenkins A HIGH-VELOCITY MOLECULAR OUTFLOW FROM THE G9.62+0.19 STAR-FORMING REGION Peter Hofner, Helmut Wiesemeyer, & Thomas Henning THE PROPER MOTION, PARALLAX, AND ORIGIN OF THE ISOLATED NEUTRON STAR RX J185635 —3754 Frederick M. Walter CHANDRA OBSERVATIONS OF VARIABLE EMBEDDED X-RAY SOURCES IN ORION. I. RESOLVING THE ORION TRAPEZIUM N. S. Schulz, C. Canizares, D. Huenemoerder, J. H. Kastner, S. C. Taylor,& E. J. Bergstrom WIYN OPEN CLUSTER STUDY. V. LITHIUM DEPLETION AND METALLICITY IN G AND K DWARFS OF THE OPEN CLUSTER M35 © David Barrado y Navascués, Constantine P. Deliyannis, & John R. Stauffer A NEW MODEL OF A TIDALLY DISRUPTED STAR Pavel B. Ivanov & Igor D. Novikov THE COSMIC GAMMA-RAY BACKGROUND IN THE MeV RANGE P. Ruiz-Lapuente, M. Cassé, & E. Vangioni-Flam GAMMA-RAY EMISSIONS FROM PULSARS: SPECTRA OF THE TeV FLUXES FROM OUTER GAP ACCELERATORS K. Hirotani X-RAY LINES FROM HOT FLOWS AROUND WHITE DWARFS: APPLICATION TO SS CYGNI Kristen Menou, Rosalba Perna, & John C. Raymond ON THE MASS AND INCLINATION OF THE PSR J2019+2425 BINARY SYSTEM David J. Nice, Eric M. Splaver, & Ingrid H. Stairs MULTIWAVELENGTH STUDIES OF HERCULES X-1 DURING SHORT HIGH AND ANOMALOUS LOW STATES: ON-AGAIN, OFF-AGAIN. © S. D. Vrtilek, H. Quaintrell, B. Boroson, M. Still, H. Fiedler, K. O’Brien, & R. McCray CONTENTS ECLIPSING BROAD EMISSION LINES IN HERCULES X-i: EVIDENCE FOR A DISK WIND? James Chiang CHANDRA, EUVE, HST, AND VLA MULTIWAVELENGTH CAMPAIGN ON HR 1099: INSTRUMENTAL CAPABILITIES, DATA REDUCTION, AND INITIAL RESULTS Thomas R. Ayres, Alexander Brown, Rachel A. Osten, David P. Huenemoerder, Jeremy J. Drake, Nancy S. Brickhouse, & Jeffrey L. Linsky THE STAR FORMATION HISTORY OF TRUMPLER 14 AND TRUMPLER 16 © K. DeGioia-Eastwood, H. Throop, G. Walker, & K. M. Cudworth KECK DIFFRACTION-LIMITED IMAGING OF THE YOUNG QUADRUPLE STAR SYSTEM HD 98800 L. Prato, A. M. Ghez, R. K. Pina, C. M. Telesco, R. S. Fisher, P.W izinowich, O. Lai, D. S. Acton, & P. Stomski RADIO SUPERNOVA 1987A AT 843 MHz Lewis Ball, D. F. Crawford, R. W. Hunstead, 1. Klamer, & V. J. McIntyre DYNAMICS OF EMERGING FLUX TUBES IN THE SUN T. Magara SPECTROSCOPY OF COMET HYAKUTAKE AT 80-700 A: FIRST DETECTION OF SOLAR WIND CHARGE TRANSFER EMISSIONS Vladimir A. Krasnopolsky & Michael J. Mumma OBSERVATIONS OF UNUSUALLY SMALL DUST GRAINS IN THE COMA OF COMET HALE-BOPP C/1995 O01 © C. G. Mason, R. D. Gehrz, T. J. Jones, C. E. Woodward, M. S. Hanner, & D. M. Williams OPTICAL INTERFEROMETRIC POLARIMETRY. I. FOUNDATION Nicholas M. Elias II INSTRUCTIONS TO AUTHORS 2001 MARCH 10, NUMBER 2 COSMIC —— o BACKGROUND OBSERVABLES AND THEIR COSMOLOGICAL IMPLICATIONS Wayne Hu, Masataka Fukugita, Matias Zaldarriaga, & Max Tegmark HYDRODYNAMIC SIMULATIONS OF THE SUNYAEV-ZELDOVICH EFFECT(S) Volker Springel, Martin White, & Lars Hernquist BIASED GALAXY FORMATION AND MEASUREMENTS OF £8 Andreas A. Berlind, Vijay K. Narayanan, & David H. Weinberg SCALING LAWS AND LUMINOSITY SEGREGATION Loris P. L. Colombo & Silvio A. Bonometto ULTRA-HIGH ENERGY COSMIC RAYS: ARE THEY ISOTROPIC? © Gustavo Medina-Tanco INTEGRATING EINSTEIN FIELD EQUATIONS IN OBSERVATIONAL COORDINATES WITH COSMOLOGICAL DATA FUNCTIONS: NONFLAT FRIEDMANN-LEMAITRE-ROBERTSON-WALKER CASES M. E. Araujo, R. C. Arcuri, M. L. Bedran, L. R. de Freitas, & W. R. Stoeger NICMOS OBSERVATIONS OF EXTRAGALACTIC CEPHEIDS. I. PHOTOMETRY DATABASE AND A TEST OF THE STANDARD EXTINCTION LAW L. M. Macri, D. Calzetti, W. L. Freedman, B. K. Gibson, J. A. Graham, J. P. Huchra, S. M. G. Hughes, B. F. Madore, J. R. Mould, S. E. Persson, & P. B. Stetson THE STAR FORMATION HISTORY OF THE UNIVERSE: AN INFRARED PERSPECTIVE Michael Rowan-Robinson PLANET OBSERVATIONS OF MICROLENSING EVENT OGLE-1999-BUL-23: LIMB-DARKENING MEASUREMENT OF THE SOURCE STAR M. D. Albrow, J. An, J.-P. Beaulieu, J. A. R. Caldwell, D. L. DePoy, M. Dominik, B. S. Gaudi, A. Gould, J. Greenhill, K. Hill, S. Kane, R. Martin, J. Menzies, R. W. Pogge, K. R. Pollard, P. D. Sackett, K. C. Sahu, P. Vermaak, R. Watson, & A. Williams AN IMAGING AND SPECTROSCOPIC STUDY OF THE z,,, = 3.38639 DAMPED Lya SYSTEM IN Q0201 + 1120: CLUES TO STAR FORMATION AT HIGH REDSHIFT Sara L. Ellison, Max Pettini, Charles C. Steidel, & Alice E. Shapley THE SURROUNDINGS OF DISTURBED, ACTIVE GALAXIES © Halton Arp CONTENTS A POSSIBLE RELATIONSHIP BETWEEN QUASARS AND CLUSTERS OF GALAXIES Halton Arp & David Russell A LOW GLOBAL STAR FORMATION RATE IN THE RICH GALAXY CLUSTER AC 114 AT z=032 © Warrick J. Couch, Michael L. Balogh, Richard G. Bower, Ian Smail, Karl Glazebrook, & Melinda Taylor A MODERATE CLUSTER COOLING FLOW MODEL Noam Soker, Raymond E. White III, Laurence P. David, & Brian R. McNamara PARSEC-SCALE BLAZAR MONITORING: PROPER MOTIONS Daniel C. Homan, Roopesh Ojha, John F. C. Wardle, David H. Roberts, Margo F. Aller, Hugh D. Aller, & Philip A. Hughes MODELS OF CUSPY TRIAXIAL GALAXIES Kelly Holley-Bockelmann, J. Christopher Mihos, Steinn Sigurdsson, & Lars Hernquist UNCOVERING THE INTRINSIC SHAPES OF ELLIPTICAL GALAXIES. IV. TESTS ON SIMULATED MERGER REMNANTS Thomas S. Statler, Heath Lambright, & Jakob Bak ON IONIZATION EFFECTS AND ABUNDANCE RATIOS IN DAMPED Lya SYSTEMS Yuri I. Izotov, Daniel Schaerer, & Corinne Charbonnel THE UNIQUE RAPID VARIABILITIES OF THE IRON Ka LINE PROFILES IN NGC 4151 Jun-Xian Wang, Ting-Gui Wang, & You- Yuan Zhou THE CENTRAL VELOCITY FIELD IN NGC 253: POSSIBLE INDICATION OF A BAR Mousumi Das, K. R. Anantharamaiah, & M. S. Yun A GAMMA-RAY FLARE OF QUASAR CTA 26 J. R. Mattox, J. C. Hallum, A. P. Marscher, S. G. Jorstad, E. B. Waltman, H. Terdsranta, H. D. Aller, & M. F. Aller PEERING THROUGH THE DUST: EVIDENCE FOR A SUPERMASSIVE BLACK HOLE AT THE NUCLEUS OF CENTAURUS A FROM VLT INFRARED SPECTROSCOPY Alessandro Marconi, Alessandro Capetti, David J. Axon, Anton Koekemoer, Duccio Macchetto, & Ethan J. Schreier EUVE OBSERVATIONS OF PKS 2155—304: VARIABILITY, SPECTRA, AND A POLARIZATION MEASUREMENT ATTEMPT Herman L. Marshall, C. Megan Urry, Rita M. Sambruna, & Joseph E. Pesce TIDAL SPIN-UP OF STARS IN DENSE STELLAR CUSPS AROUND MASSIVE BLACK HOLES © Tal Alexander & Pawan Kumar RADIO POLARIZATION FROM THE INNER GALAXY AT ARCMINUTE RESOLUTION B. M. Gaensler, John M. Dickey, N. M. McClure-Griffiths, A. J. Green, M. H. Wieringa, &R . F. Haynes RADIO CONTINUUM AND RECOMBINATION LINE STUDY OF ULTRACOMPACT H 1 REGIONS WITH EXTENDED ENVELOPES Kee-Tae Kim & Bon-Chul Koo ANOMALOUS RADIO-WAVE SCATTERING FROM INTERSTELLAR PLASMA STRUCTURES J. M. Cordes & T. Joseph W. Lazio R-MODES IN NEUTRON STARS WITH CRUSTS: TURBULENT SATURATION, SPIN-DOWN, AND CRUST MELTING Yangin Wu, Christopher D. Matzner, & Phil Arras THE GIANT FLARE OF 1998 AUGUST 27 FROM SGR 1900+14. I. AN INTERPRETIVE STUDY OF BEPPOSAX AND ULYSSES OBSERVATIONS M. Feroci, K. Hurley, R. C. Duncan, & C. Thompson THERMAL X-RAY PULSES RESULTING FROM PULSAR GLITCHES Anisia P. S. Tang & K. S. Cheng ON THE STRUCTURE OF ADVECTIVE ACCRETION DISKS AT HIGH LUMINOSITY Ioulia V. Artemova, Gennadi S. Bisnovatyi-Kogan, Igor V. Igumenshchev, & Igor D. Novikov THE DOMINANCE OF DYNAMIC BARLIKE INSTABILITIES IN THE EVOLUTION OF A MASSIVE STELLAR CORE COLLAPSE THAT “FIZZLES” James N. Imam&u Rricahar d H. Durisen PULSAR ACCELERATION BY ASYMMETRIC EMISSION OF STERILE NEUTRINOS Enrico Nardi & Jorge I. Zuluaga NUCLEOSYNTHESIS BELOW A = 100 IN MASSIVE STARS R. D. Hoffman, S. E. Woosley, & T. A. Weaver THE NATURE OF THE RADIATIVE HYDRODYNAMIC INSTABILITIES IN RADIATIVELY SUPPORTED THOMSON ATMOSPHERES © Nir J. Shaviv CONTENTS PULSAR JETS: IMPLICATIONS FOR NEUTRON STAR KICKS AND INITIAL SPINS Dong Lai, David F. Chernoff, & James M. Cordes INSTABILITIES AND CLUMPING IN TYPE Ia SUPERNOVA REMNANTS Chih-Yueh Wang & Roger A. Chevalier TIMING ANALYSIS OF THE LIGHT CURVE OF THE DIPPING-BURSTING X-RAY BINARY X1916—053 Y. Chou, J. E. Grindlay, & P. F. Bloser HIPPARCOS AND MAP STUDIES OF THE TRIPLE STAR xz CEPHEI George Gatewood, Inwoo Han, Joost Kiewiet de Jonge, C. Thomas Reiland, & Dimitri Pourbaix DID SOLAR ENERGETIC PARTICLES PRODUCE THE SHORT-LIVED NUCLIDES PRESENT IN THE EARLY SOLAR SYSTEM? J. N. Goswami, K. K. Marhas, & S. Sahijpal MAGNETOHYDRODYNAMIC SIMULATION OF A SOLAR FLARE WITH CHROMOSPHERIC EVAPORATION EFFECT BASED ON THE MAGNETIC RECONNECTION MODEL Takaaki Yokoyama & Kazunari Shibata SOLAR CORONAL BRIGHTNESS CHANGES AND MASS EJECTIONS DURING SOLAR CYCLE 22 R. M. MacQueen, J. T. Burkepile, T. E. Holzer, A. L. Stanger, & K. E. Spence TRANSPORT AND STORAGE OF MAGNETIC FIELD BY OVERSHOOTING TURBULENT COMPRESSIBLE CONVECTION Steven M. Tobias, Nicholas H. Brummell, Thomas L. Clune, & Juri Toomre MEASUREMENTS OF SOLAR IRRADIANCE AND EFFECTIVE TEMPERATURE AS A PROBE OF SOLAR INTERIOR MAGNETIC FIELDS L. H. Li& S. Sofia THE ZIGZAG PATH OF BUOYANT MAGNETIC TUBES AND THE GENERATION OF VORTICITY ALONG THEIR PERIPHERY T. Emonet, F. Moreno-Insertis, & M. P. Rast OBSERVATIONAL INTERPRETATION OF AN ACTIVE PROMINENCE ON 1999 MAY i Holly R. Gilbert, Thomas E. Holzer, B. C. Low, & Joan T. Burkepile ERRATUM CO OUTFLOWS FROM YOUNG STARS: CONFRONTING THE JET AND WIND MODELS C.-F. Lee, L. G. Mundy, B. Reipurth, E. C. Ostriker, & J. M. Stone