THE ASTROPHYSICAL JOURNAL CONTENTS OF VOLUME 663, PART | 2007 JULY 1, NUMBER | 21 cm SIGNALS FROM EARLY IONIZING SOURCES Jiren Liu, Jing-Mei Oiu, Long-Long Feng, Chi-Wang Shu, & Li-Zhi Fang A KECK SURVEY FOR GRAVITATIONALLY LENSED Lya EMITTERS IN THE REDSHIFT RANGE 8.5 < z < 10.4 NEW CONSTRAINTS ON THE CONTRIBUTION OF LOW-LUMINOSITY SOURCES TO COSMIC REIONIZATION Daniel P. Stark, Richard S. Ellis, Johan Richard, Jean-Paul Kneib, Graham P. Smith, & Michael R. Santos MESO-STRUCTURE IN THREE STRONG-LENSING SYSTEMS Prasenjit Saha, Liliya L. R. Williams, & Ignacio Ferreras GALACTIC WIND SIGNATURES AROUND HIGH-REDSHIFT GALAXIES © Daisuke Kawata & Michael Rauch ON THE INCONSISTENCY BETWEEN THE BLACK HOLE MASS FUNCTION INFERRED FROM M,-o AND M,-L CORRELATIONS © Elena Tundo, Mariangela Bernardi, Joseph B. Hyde, Ravi K. Sheth, & Alessandro Pizzella CORRELATIONS BETWEEN CENTRAL MASSIVE OBJECTS AND THEIR HOST GALAXIES: FROM BULGELESS SPIRALS TO ELLIPTICALS Yuexing Li, Zoltan Haiman, & Mordecai-Mark Mac Low EMISSION-LINE GAS KINEMATICS IN THE VICINITY OF THE SUPERMASSIVE BLACK HOLES IN NEARBY RADIO GALAXIES Jacob Noel-Storr, Stefi A.B aum, & Christopher P. O'Dea SPECTRAL ENERGY DISTRIBUTIONS OF HARD X-RAY SELECTED ACTIVE GALACTIC NUCLEI IN THE XMM-NEWTON MEDIUM DEEP SURVEY © M. Polletta, M. Tajer, L. Maraschi, G. Trinchieri, C. J. Lonsdale, L. Chiappetti, S. Andreon, M. Pierre, O. Le Fevre, G. Zamorani, D. Maccagni, O. Garcet, J. Surdej, A. Franceschini, D. Alloin, D. L. Shupe, J. A. Surace, F: Fang, M. Rowan-Robinson, H. E. Smith, & L. Tresse THE INTRINSICALLY X-RAY WEAK QUASAR PHL 1811. I. X-RAY OBSERVATIONS AND SPECTRAL ENERGY DISTRIBUTION Karen M. Leighly, Jules P. Halpern, Edward B. Jenkins, Dirk Grupe, Jiehae Choi, & Kimberly B. Prescott HIGHLY POLARIZED OPTICALLY SELECTED BL LACERTAE OBJECTS Paul S. Smith, G. Grant Williams, Gary D. Schmidt, Aleksandar M. Diamond-Stanic, & Dennis L. Means OBSERVATIONS OF MARKARIAN 421 WITH THE MAGIC TELESCOPE © J. Albert, E. Aliu, H. Anderhub, P. Antoranz, A. Armada, M. Asensio, C. Baixeras, J. A. Barrio, H. Bartko, D. Bastieri, J. Becker, W. Bednarek, K. Berger, C. Bigongiari, A. Biland, R. K. Bock, P. Bordas, V. Bosch-Ramon, T. Bretz, I. Britvitch, M. Camara, E. Carmona, A. Chilingarian, S. Ciprini, J. A. Coarasa, S. Commichau, J. L. Contreras, J. Cortina, V. Curtef, V. Danielyan, F: Dazzi, A. De Angelis, R. de los Reyes, B. De Lotto, E. Domingo-Santamaria, D. Dorner, M. Doro, M. Errando, M. Fagiolini, D. Ferenc, E. Fernandez, R. Firpo, J. Flix, M. V. Fonseca, L. Font, M. Fuchs, N. Galante, M. Garczarczyk, M. Gaug, M. Giller, F.G oebel, D. Hakobyan, M. Hayashida, T. Hengstebeck, D. Hohne, J. Hose, C. C. Hsu, P. Jacon, T. Jogler, O. Kalekin, R. Kosyra, D. Kranich, R. Kritzer, M. Laatiaoui, A. Laille, P. Liebing, E. Lindfors, S. Lombardi, F. Longo, J. Lopez, M. Lopez, E. Lorenz, P. Majumdar, G. Maneva, K. Mannheim, O. Mansutti, M. Mariotti, M. Martinez, D. Mazin, C. Merck, M. Meucci, M. Meyer, J. M. Miranda, R. Mirzoyan, S. Mizobuchi, A. Moralejo, K. Nilsson, J. Ninkovic, E. Oria-Wilhelmi, R. Orduna, N. Otte, 1. Oya, D. Paneque, R. Paoletti, J. M. Paredes, M. Pasanen, D. Pascoli, F: Pauss, R. Pegna, M. Persic, L. Peruzzo, A. Piccioli, M. Poller, E. Prandini, A.R aymers, W. Rhode, M. Ribo, J. Rico, M. Rissi, A. Robert, S. Riigamer, A. Saggion, A. Sanchez, P. Sartori, V. Scalzotto, V. Scapin, R. Schmitt, T: Schweizer, M. Shayduk, K. Shinozaki, S. N. Shore, N. Sidro, A. Sillanpaa, D. Sobczynska, A. Stamerra, L. S. Stark, L. Takalo, P. Temnikov, D. Tescaro, M. Teshima, N. Tonello, A. Torres, D. F. Torres, N. Turini, H. Vankov, V. Vitale, R. M. Wagner, T. Wibig, W. Wittek, R. Zanin, & J. Zapatero ACCURATE REALIZATIONS OF THE IONIZED GAS IN GALAXY CLUSTERS: CALIBRATING FEEDBACK © Paul Bode, Jeremiah P. Ostriker, Jochen Weller, & Laurie Shaw NEAR-INFRARED PROPERTIES OF MODERATE-REDSHIFT GALAXY CLUSTERS. II. HALO OCCUPATION NUMBER, MASS-TO-LIGHT RATIOS, AND Q,, © Adam Muzzin, H. K. C. Yee, Patrick B. Hall, & H. Lin CONTENTS VLT AND ACS OBSERVATIONS OF RDCS J1252.9—2927: DYNAMICAL STRUCTURE AND GALAXY POPULATIONS IN A MASSIVE CLUSTER AT z= 1.237. © R. Demarco, P. Rosati, C. Lidman, M. Girardi, M. Nonino, A. Rettura, V. Strazzullo, A. van der Wel, H. C. Ford, V. Mainieri, B. P. Holden, S. A. Stanford, J. P. Blakeslee, R. Gobat, M. Postman, P. Tozzi, R. A. Overzier, A. W. Zirm, N. Benitez, N. L. Homeier, G. D. Illingworth, L. Infante, M. J. Jee, S. Mei, F- Menanteau, V. Motta, W. Zheng, M. Clampin, & G. Hartig MODELS OF VERTICALLY STRATIFIED TWO-PHASE ISM DISKS WITH MRI-DRIVEN TURBULENCE © Robert A. Piontek & Eve C. Ostriker OPTICAL LINE DIAGNOSTICS OF z = 2 OPTICALLY FAINT ULTRALUMINOUS INFRARED GALAXIES IN THE SPITZER BOOTES SURVEY © K. Brand, A. Dey, V. Desai, B. T. Soifer, C. Bian, L. Armus, M. J. I. Brown, E. Le Floc’h, S. J. Higdon, J. R. Houck, B. T. Jannuzi, & D. W. Weedman SPECTROSCOPIC SURVEY OF 1.4 GHz AND 24 ym SOURCES IN THE SP/TZER FIRST LOOK SURVEY WITH WIYN HYDRA © F. R. Marleau, D. Fadda, P. N. Appleton, A. Noriega-Crespo, M. Im, & D. Clancy CHANDRA ACIS SURVEY OF M33 (CHASEM33): X-RAY IMAGING SPECTROSCOPY OF M33SNR 21, THE BRIGHTEST X-RAY SUPERNOVA REMNANT IN M33 © Terrance J. Gaetz, William P. Blair, John P. Hughes, P. Frank Winkler, Knox S. Long, Thomas G. Pannuti, Benjamin Williams, Richard J. Edgar, Parviz Ghavamian, Paul P. Plucinsky, Manami Sasaki, Robert P. Kirshner, Miguel Avillez, & Dieter Breitschwerdt TOPOLOGY OF H1 GAS DISTRIBUTION IN THE LARGE MAGELLANIC CLOUD Sungeun Kim & Changbom Park ECLIPSING BINARIES IN THE MACHO DATABASE: NEW PERIODS AND CLASSIFICATIONS FOR 3031 SYSTEMS IN THE LARGE MAGELLANIC CLOUD © A. Derekas, L. L. Kiss, & T. R. Bedding ROTATION MEASURES OF EXTRAGALACTIC SOURCES BEHIND THE SOUTHERN GALACTIC PLANE: NEW INSIGHTS INTO THE LARGE-SCALE MAGNETIC FIELD OF THE INNER MILKY WAY © J. C. Brown, M. Haverkorn, B. M. Gaensler, A. R. Taylor, N. S. Bizunok, N. M. McClure-Griffiths, J. M. Dickey, & A. J. Green THE BLUE STRAGGLER POPULATION OF THE GLOBULAR CLUSTER M5 B. Lanzoni, E. Dalessandro, F- R. Ferraro, C. Mancini, G. Beccari, R. T. Rood, M. Mapelli, & S. Sigurdsson PHOTOMETRY OF THE GLOBULAR CLUSTER NGC 5466: RED GIANTS AND BLUE STRAGGLERS © Nassissie Fekadu, Eric L. Sandquist, & Michael Bolte THE MULTIPLICITY OF THE SUBGIANT BRANCH OF w CENTAURI: EVIDENCE FOR PROLONGED STAR FORMATION © S. Villanova, G. Piotto, I. R. King, J. Anderson, L. R. Bedin, R. G. Gratton, S. Cassisi, ¥. Momany, A. Bellini, A. M. Cool, A. Recio-Blanco, & A. Renzini X-RAY TIMING OBSERVATIONS OF PSR J1930+1852 IN THE CRAB-LIKE SNR G54.1+0.3 Fangjun Lu, Q. Daniel Wang, E. V. Gotthelf, & Jinlu Qu AN ANALYSIS OF THE SHAPES OF INTERSTELLAR EXTINCTION CURVES. V. THE IR-THROUGH-UV CURVE MORPHOLOGY © E. L. Fitzpatrick & D. Massa JETS AND TORI IN PROTO—-PLANETARY NEBULAE P. J. Huggins FURTHER INDICATIONS OF JET ROTATION IN NEW ULTRAVIOLET AND OPTICAL HUBBLE SPACE TELESCOPE STIS SPECTRA Deirdre Coffey, Francesca Bacciotti, Thomas P. Ray, Jochen Eisléffel, & Jens Woitas STEADY STATE EVOLUTION OF DEBRIS DISKS AROUND A STARS M. C. Wyatt, R. Smith, K. Y. L. Su, G. H. Rieke, J. S. Greaves, C. A. Beichman, & G. Brvden DETECTION OF [Ne 1] EMISSION FROM YOUNG CIRCUMSTELLAR DISKS © I. Pascucci, D. Hollenbach, J. Najita, J. Muzerolle, U. Gorti, G. J. Herczeg, L. A. Hillenbrand, J. S. Kim, J. M. Carpenter, M. R. Meyer, E. E. Mamajek, & J. Bouwman NEW VERY LOW MASS BINARIES IN THE TAURUS STAR-FORMING REGION Q. M. Konopacky, A. M. Ghez, E. L. Rice, & G. Duchéne ON THE ORIGIN OF THE CORRELATIONS BETWEEN GAMMA-RAY BURST OBSERVABLES © Shlomo Dado, Arnon Dar, & A. De Rijula X-RAY HARDNESS EVOLUTION IN GRB AFTERGLOWS AND FLARES: LATE-TIME GRB ACTIVITY WITHOUT Ny VARIATIONS © Nathaniel R. Butler & Daniel Kocevski ON THE ABSENCE OF WIND SIGNATURES IN GRB AFTERGLOW SPECTRA: CONSTRAINTS ON THE WOLF-RAYET WINDS OF GRB PROGENITORS © Hsiao-Wen Chen, Jason X. Prochaska, Enrico Ramirez-Ruiz, Joshua S. Bloom, Miroslava Dessauges-Zavadsky, & Ryan J. Foley CONTENTS DEAD ZONE FORMATION AND NONSTEADY HYPERACCRETION IN COLLAPSAR DISKS: A POSSIBLE ORIGIN OF SHORT-TERM VARIABILITY IN THE PROMPT EMISSION OF GAMMA-RAY BURSTS Youhei Masada, Norita Kawanaka, Takayoshi Sano, & Kazunari Shibata DETERMINATION OF BLACK HOLE MASS IN CYGNUS X-1 BY SCALING OF SPECTRAL INDEX—QPO FREQUENCY CORRELATION Nickolai Shaposhnikov & Lev Titarchuk THERMODYNAMIC DESCRIPTION OF INELASTIC COLLISIONS IN GENERAL RELATIVITY Jorg Hennig, Gernot Neugebauer, & Marcus Ansorg UNCOVERING THE NATURE OF THE X-RAY TRANSIENT 4U 1730—22: DISCOVERY OF X-RAY EMISSION FROM A NEUTRON STAR IN QUIESCENCE WITH CHANDRA John A. Tomsick, Dawn M. Gelino, & Philip Kaaret THE RADIO EMISSION, X-RAY EMISSION, AND HYDRODYNAMICS OF G328.4+0.2: A COMPREHENSIVE ANALYSIS OF A LUMINOUS PULSAR WIND NEBULA, ITS NEUTRON STAR, AND THE PROGENITOR SUPERNOVA EXPLOSION © Joseph D. Gelfand, B. M. Gaensler, Patrick O. Slane, Daniel J. Patnaude, John P. Hughes, & Fernando Camilo CHANDRA AND XMM-NEWTON DISCOVERY OF TRANSIENT X-RAY PULSAR IN THE NEARBY SPIRAL GALAXY NGC 2403 Sergey P. Trudolyubov, William C. Priedhorsky, & France A. Cordova THE MAGNETAR XTE J1810—197: VARIATIONS IN TORQUE, RADIO FLUX DENSITY, AND PULSE PROFILE MORPHOLOGY F. Camilo, I. Cognard, S. M. Ransom, J. P. Halpern, J. Reynolds, N. Zimmerman, E. V. Gotthelf, D. J. Helfand, P. Demorest, G. Theureau, & D. C. Backer SWIFT X-RAY OBSERVATIONS OF CLASSICAL NOVAE © J.-U. Ness, G. J. Schwarz, A. Retter, S. Starrfield, J. H. M. M. Schmitt, N. Gehrels, D. Burrows, & J. P. Osborne SPITZER SPACE TELESCOPE OBSERVATIONS OF THE MAGNETIC CATACLYSMIC VARIABLE AE AQUARII Guillaume Dubus, Ronald E. Taam, Chat Hull, Dan M. Watson, & Jon C. Mauerhan X-RAY SPECTRAL VARIATION OF 7 CARINAE THROUGH THE 2003 X-RAY MINIMUM Kenji Hamaguchi, Michael F; Corcoran, Theodore Gull, Kazunori Ishibashi, Julian M. Pittard, D. John Hillier, Augusto Damineli, Kris Davidson, Krister E. Nielsen, & Gladys Vieira Kober MULTISPECTRAL OBSERVATIONS OF LUNAR OCCULTATIONS. I. RESOLVING THE DUST SHELL AROUND AFGL 5440 Paul M. Harvey & Andrew Oldag COUPLING BETWEEN RADIAL AND TORSIONAL OSCILLATIONS IN A MAGNETIZED PLASMA AND POSSIBLE STELLAR APPLICATIONS © Tl. V. Zagarashvili & G. Belvedere ON THE STRUCTURE AND PROPERTIES OF DIFFERENTIALLY ROTATING, MAIN-SEQUENCE STARS IN THE 1—2 Mz, RANGE K. B. MacGregor, Stephen Jackson, Andrew Skumanich, & Travis S. Metcalfe THE MASS AND RADIUS OF THE UNSEEN M DWARF COMPANION IN THE SINGLE-LINED ECLIPSING BINARY HAT-TR-205-013 © Thomas G. Beatty, Jose M. Fernandez, David W. Latham, Gaspar A. Bakos, Géza Kovacs, Robert W. Noyes, Robert P. Stefanik, Guillermo Torres, Mark E. Everett, & Carl W. Hergenrother A NEW TECHNIQUE FOR MAPPING OPEN MAGNETIC FLUX FROM THE SOLAR SURFACE INTO THE HELIOSPHERI J. A. Gilbert, T. H. Zurbuchen, & L. A. Fisk A CATASTROPHIC FLUX ROPE IN A QUADRUPOLE MAGNETIC FIELD FOR CORONAL MASS EJECTIONS Y.-Z. Zhang & J.-X. Wang LOCALIZED ENHANCEMENTS OF Fe!” DENSITY IN THE CORONA AS OBSERVED IN Fe x1 789.2 nm DURING THE 2006 MARCH 29 TOTAL SOLAR ECLIPSE Shadia Rifai Habbal, Huw Morgan, Judd Johnson, Martina Belz Arndt, Adrian Daw, Sarah Jaeggli, Jeff Kuhn, & Don Mickey CONTINUOUS TRANSITION FROM FAST MAGNETIC RECONNECTION TO SLOW RECONNECTION AND CHANGE OF THE RECONNECTION SYSTEM STRUCTURE Shin-va Nitta HANLE-ZEEMAN REDISTRIBUTION MATRIX. I. CLASSICAL THEORY EXPRESSIONS IN THE LABORATORY FRAMI M. Sampoorna, K. N Nagendra, & J. O. Stenflo THE OUTER SOLAR ATMOSPHERE DURING THE MAUNDER MINIMUM: A STELLAR PERSPECTIVE Philip G. Judge & Steven H. Saar FRAGMENTATION HIERARCHY OF BRIGHT SUNGRAZING COMETS AND THE BIRTH AND ORBITAL EVOLUTION OF THE KREUTZ SYSTEM. Il. THE CASE FOR CASCADING FRAGMENTATION Zdenek Sekanina & Paul W. Chodas MID-INFRARED SELECTION OF BROWN DWARFS AND HIGH-REDSHIFT QUASARS © Daniel Stern, J. Davy Kirkpatrick, Lori E. Allen, Chao Bian, Andrew Blain, Kate Brand, Mark Brodwin, MichaelJ . I. Brown, Richard Coo! Vandana Desai, Arjun Dey, Peter Eisenhardt, Anthony Gonzalez, Buell T. Jannuzi, Karin Menendez-Delmestre, Howard A. Smith B. T. Soijer, Glenn P. Tiede, & E. Wright CONTENTS Page 2007 JULY 10, NUMBER 2 EARLY COSMOLOGICAL H 11/ He 11 REGIONS AND THEIR IMPACT ON SECOND-GENERATION STAR FORMATION © Naoki Yoshida, S. Peng Oh, Tetsu Kitayama, & Lars Hernquist OBSERVATIONS OF HIGH-REDSHIFT X-RAY SELECTED CLUSTERS WITH THE SUNYAEV-ZEL’DOVICH ARRAY Stephen Muchovej, Tony Mroczkowski, John E. Carlstrom, John Cartwright, Christopher Greer, Ryan Hennessy, Michael Loh, Clem Pryke, Ben Reddall, Marcus Runyan, Matthew Sharp, David Hawkins, James W. Lamb, David Woody, Marshall Joy, Erik M. Leitch, & Amber D. Miller USING WEAK-LENSING DILUTION TO IMPROVE MEASUREMENTS OF THE LUMINOUS AND DARK MATTER IN A1689. © Elinor Medezinski, Tom Broadhurst, Keiichi Umetsu, Dan Coe, Narciso Benitez, Holland Ford, Yoel Rephaeli, Nobuo Arimoto, & Xu Kong SMOOTH AND STARBURST TIDAL TAILS IN THE GEMS AND GOODS FIELDS Debra Meloy Elmegreen, Bruce G. Elmegreen, Thomas Ferguson, & Brendan Mullan MINING THE SDSS ARCHIVE. I. PHOTOMETRIC REDSHIFTS IN THE NEARBY UNIVERSE © Raffaele D'Abrusco, Antonino Staiano, Giuseppe Longo, Massimo Brescia, Maurizio Paolillo, Elisabetta De Filippis, & Roberto Tagliaferri THE HABITAT SEGREGATION BETWEEN LYMAN BREAK GALAXIES AND Lya EMITTERS AROUND A QSO ATz~5 © Nobunari Kashikawa, Tetsu Kitayama, Mamoru Doi, Toru Misawa, Yutaka Komiyama, & Kazuaki Ota ROBUST MACHINE LEARNING APPLIED TO ASTRONOMICAL DATA SETS. Il. QUANTIFYING PHOTOMETRIC REDSHIFTS FOR QUASARS USING INSTANCE-BASED LEARNING © Nicholas M. Ball, Robert J. Brunner, Adam D. Myers, Natalie E. Strand, Stacey L. Alberts, David Tcheng, & Xavier Llora OBSERVATIONS OF O1 AND Cai EMISSION LINES IN QUASARS: IMPLICATIONS FOR THE SITE OF Fe 1 LINE EMISSION Y. Matsuoka, S. Oyabu, Y. Tsuzuki, & K. Kawara ABSORPTION MEASURE DISTRIBUTION OF THE OUTFLOW IN IRAS 13349+2438: DIRECT OBSERVATION OF THERMAL INSTABILITY? © Tomer Holczer, Ehud Behar, & Shai Kaspi THE MID-INFRARED EMISSION OF M87. © Eric S. Perlman, R. E. Mason, Christopher Packham, N. A. Levenson, Moshe Elitzur, Justin J. Schaefer, Masatoshi Imanishi, William B. Sparks, & James Radomski THREE-DIMENSIONAL MAGNETOHYDRODYNAMIC SIMULATIONS OF COLD FRONTS IN MAGNETICALLY TURBULENT ICM N. Asai, N. Fukuda, & R. Matsumoto A COMPARISON BETWEEN ANOMALOUS 6 cm H»CO ABSORPTION AND CO(1—0) EMISSION IN THE L1204/S140 REGION Monica Ivette Rodriguez, Tommy Wiklind, RonaldJ . Allen, Vladimir Escalante, & Laurent Loinard STAR FORMATION AND THE GROWTH OF STELLAR MASS Eric F- Bell, Xian Zhong Zheng, Casey Papovich, Andrea Borch, Christian Wolf, & Klaus Meisenheimer SUPER STAR CLUSTER VELOCITY DISPERSIONS AND VIRIAL MASSES IN THE M82 NUCLEAR STARBURST Nate McCrady & James R. Graham POSITION-VELOCITY DIAGRAMS FOR THE MASER EMISSION COMING FROM A KEPLERIAN RING Lucero Uscanga, Jorge Canto, & Alejandro C. Raga DUST MASSES, PAH ABUNDANCES, AND STARLIGHT INTENSITIES IN THE SINGS GALAXY SAMPLE © B. T. Draine, D. A. Dale, G. Bendo, K. D. Gordon, J. D. T. Smith, L. Armus, C. W. Engelbracht, G. Helou, R. C. Kennicutt, Jr, A. Li, H. Roussel, F. Walter, D. Calzetti, J. Moustakas, E. J. Murphy, G. H. Rieke, C. Bot, D. J. Hollenbach, K. Sheth, & H. I. Teplitz SPITZER OBSERVATIONS OF LOW-LUMINOSITY ISOLATED AND LOW SURFACE BRIGHTNESS GALAXIES 895 J. L. Hinz, M. J. Rieke, G. H. Rieke, C. N. A. Willmer, K. Misselt, C. W. Engelbracht, M. Blaylock, & T. E. Pickering EXPLORING INFRARED PROPERTIES OF GIANT LOW SURFACE BRIGHTNESS GALAXIES 908 Nurur Rahman, Justin H. Howell, George Helou, Joseph M. Mazzarella, & Brent Buckalew EXPLORING SUPERMASSIVE BLACK HOLE GROWTH WITH ALMA © 924 Nozomu Kawakatu, Paola Andreani, Gian Luigi Granato, & Luigi Danese INTEGRAL FIELD UNIT OBSERVATIONS OF NGC 4302: KINEMATICS OF THE DIFFUSE IONIZED GAS HALO © George H. Heald, Richard J. Rand, Robert A. Benjamin, & Matthew A. Bershady THE OBSERVED PROPERTIES OF DARK MATTER ON SMALL SPATIAL SCALES © 948 Gerard Gilmore, Mark I. Wilkinson, Rosemary F. G. Wyse, Jan T. Kleyna, Andreas Koch, N. Wyn Evans, & Eva K. Grebel EXPLORING HALO SUBSTRUCTURE WITH GIANT STARS. X. EXTENDED DARK MATTER OR TIDAL DISRUPTION?: 960 THE CASE FOR THE LEO I DWARF SPHEROIDAL GALAXY © Sangmo Tony Sohn, Steven R. Majewski, Ricardo R. Munoz, William E. Kunkel, Kathryn V. Johnston, James C. Ostheimer, Puragra Guhathakurta, Richard J. Patterson, Michael H. Siegel, & Michael C. Cooper THE LOW CO CONTENT OF THE EXTREMELY METAL-POOR GALAXY I Zw 18 Adam Leroy, John Cannon, Fabian Walter, Alberto Bolatto, & Axel Weiss CONTENTS MODELS FOR MASSIVE STELLAR POPULATIONS WITH ROTATION © Gerardo A. Vazquez, Claus Leitherer, Daniel Schaerer, Georges Meynet, & Andre Maeder STAR COUNTS IN THE GLOBULAR CLUSTER w CENTAURI. I. BRIGHT STELLAR COMPONENTS © V. Castellani, A. Calamida, G. Bono, P. B. Stetson, L. M. Frevyhammer, S. Degl'Innocenti, P. Prada Moroni, M. Monelli, C. E. Corsi, M. Nonino, R. Buonanno, F. Caputo, M. Castellani, M. Dall’Ora, M. Del Principe, I. Ferraro, G. lannicola, A. M. Piersimoni, L. Pulone, & C. Vuerli A PANCHROMATIC STUDY OF THE GLOBULAR CLUSTER NGC 1904. I. THE BLUE STRAGGLER POPULATION 1040 B. Lanzoni, N. Sanna, F- R. Ferraro, E. Valenti, G. Beccari, R. P. Schiavon, R. T. Rood, M. Mapelli, & S. Sigurdsson ON THE ABILITY OF DIFFERENT DIFFUSION THEORIES TO ACCOUNT FOR DIRECTLY SIMULATED 1049 DIFFUSION COEFFICIENTS J. Minnie, J. W. Bieber, W. H. Matthaeus, & R. A. Burger POLARIZATION OF DUST EMISSION IN CLUMPY MOLECULAR CLOUDS AND CORES T. J. Bethell, A. Chepurnov, A. Lazarian, & J. Kim INFRARED EXTINCTION TOWARD NEARBY STAR-FORMING REGIONS © 1069 K. M. Flaherty, J. L. Pipher, S. T. Megeath, E. M. Winston, R. A. Gutermuth, J. Muzerolle, L. E. Allen, & G. G. Fazio CHANGES IN THE RADIO APPEARANCE OF MWC 349A 1083 Luis F; Rodriguez, Yolanda Gomez, & Daniel Tafoya OUTFLOW AND INFALL IN A SAMPLE OF MASSIVE STAR-FORMING REGIONS P. D. Klaassen & C. D. Wilson MASS AND TEMPERATURE OF THE TWA 7 DEBRIS DISK Brenda C. Matthews, Paul G. Kalas, & Mark C. Wyatt SPECTRAL HARDNESS EVOLUTION OF GAMMA-RAY BURSTS DUE TO THE DOPPLER EFFECT OF FIREBALLS R.-J. Lu, Z.-¥. Peng, & W. Dong PROBING THE STRUCTURE OF GAMMA-RAY BURST JETS WITH THE STEEP DECAY PHASE OF THEIR EARLY X-RAY AFTERGLOWS © Kentaro Takami, Rvo Yamazaki, Takanori Sakamoto, & Goro Sato GRB 061121: BROADBAND SPECTRAL EVOLUTION THROUGH THE PROMPT AND AFTERGLOW PHASES OF A BRIGHT BURST K. L. Page, R. Willingale, J. P. Osborne, B. Zhang, O. Godet, F- E. Marshall, A. Melandri, J. P. Norris, P. T. O'Brien, V. Pal’shin, E. Roi, P. Romano, R. L. C. Starling, P. Schady, S. A. Yost, S. D. Barthelmy, A. P. Beardmore, G. Cusumano, D. N. Burrows, M. De Pasquale M. Ehle, P. A. Evans, N. Gehrels, M. R. Goad, S. Golenetskii, C. Guidorzi, C. Mundell, M. J. Page, G. Ricker, T. Sakamoto, B. E. Schaefer, M. Stamatikos, E. Troja, M. Ulanov, F; Yuan, & H. Ziaeepour THE SPITZER c2d SURVEY OF LARGE, NEARBY, INTERSTELLAR CLOUDS. VIII. SERPENS OBSERVED WITH MIPS Paul M. Harvey, Luisa M. Rebull, Tim Brooke, William J. Spiesman, Nicholas Chapman, Tracy L. Huard, Neal J. Evans Il Lucas Cieza, Shih-Ping Lai, Lori E. Allen, Lee G. Mundy, Deborah L. Padgett, Anneila I. Sargent, Karl R. Stapelfeldt, Philip C. Myers, Ewine F. van Dishoeck, Geoffrey A. Blake, & David W. Koerner THE SPITZER c2d SURVEY OF LARGE, NEARBY, INTERSTELLAR CLOUDS. IX. THE SERPENS YSO POPULATION AS OBSERVED WITH IRAC AND MIPS) © Paul Harvey, Bruno Merin, Tracy L. Huard, Luisa M. Rebull, Nicholas Chapman, NealJ . Evans II, & Philip C. Mvers PRODUCTION PATHWAYS OF CCS AND CCCS INFERRED FROM THEIR '3C ISOTOPIC SPECIES Nami Sakai, Masafumi Ikeda, Masaru Morita, Takeshi Sakai, Shuro Takano, Yoshihiro Osamura, & Satoshi Yamamoto MULTICOLOR INFRARED OBSERVATIONS OF SN 2006aj. I. THE SUPERNOVA ASSOCIATED WITH XRF 060218 Daniel Kocevski, Maryam Modjaz, Joshua S. Bloom, Ryan Foley, Daniel Starr, Cullen H. Blake Emilio E. Falco, Nathaniel R. Butler, Mike Skrutskie, & Andrew Szentgyorgyi K-CORRECTIONS AND SPECTRAL TEMPLATES OF TYPE la SUPERNOVAE © E. ¥. Hsiao, A. Conley, D. A. Howell, M. Sullivan, C. J. Pritchet, R. G. Carlberg, P. E. 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Lynch, R. J. Rudy, R. W. Russell, T. Kerr, M. F. Bode, M. J. Darnley, S. P. S. Eyres T. R. Geballe, T. J. O’Brien, R. J. Davis, S. Starrfield, J.-U. Ness, J. Drake, J. P. Osborne, K. L. Page, G. Schwarz, and J. Krautter ON THE LIKELIHOOD OF SUPERNOVA ENRICHMENT OF PROTOPLANETARY DISKS Jonathan P. Williams and Eric Gaidos TrES-3: A NEARBY, MASSIVE, TRANSITING HOT JUPITER IN A 31 HOUR ORBIT Francis T. O’Donovan, David Charbonneau, Gaspar A. Bakos, Georgi Mandushev, Edward W. Dunham, Timothy M. Brown, David W. Latham, Guillermo Torres, Alessandro Sozzetti, Géza Kovacs, Mark E. Everett, Nairn Baliber, Marton G. Hidas, Gilbert A. Esquerdo, Markus Rabus, Hans J. Deeg, Juan A. Belmonte, Lynne A. Hillenbrand, and Robert P. Stefanik MAGNETIC FIELD AMPLIFICATION BY SHOCKS IN TURBULENT FLUIDS J. Giacalone and J. R. Jokipii THE UNPREDICTABILITY OF THE MOST ENERGETIC SOLAR EVENTS Hugh S. Hudson THE STREHL RATIO IN ADAPTIVE OPTICS IMAGES: STATISTICS AND ESTIMATION © Rémi Soummer and André Ferrari INSTRUCTIONS TO AUTHORS OF LETTERS, AND ADDITIONAL USEFUL INFORMATION Inside Back Cover INSTRUCTIONS FOR ELECTRONIC MANUSCRIPT SUBMISSION Back Cover 2007 JULY 10, NUMBER 2 IS THE CONCENTRATION OF DARK MATTER HALOS AT VIRIALIZATION UNIVERSAL? Massimo Ricotti, Andrew Pontzen, and Matteo Viel PROPERTIES OF A GAMMA-RAY BURST HOST GALAXY AT z ~ 5 P. A. Price, A. Songaila, L. L. Cowie, J. Bell Burnell, E. Berger, A. Cucchiara, D. B. Fox, 1. Hook, S. R. Kulkarni, B. Penprase, K. C. Roth, and B. Schmidt NONTHERMAL EMISSION ASSOCIATED WITH STRONG AGN OUTBURSTS AT THE CENTERS OF GALAXY CLUSTERS © Yutaka Fujita, Kazunori Kohri, Ryo Yamazaki, and Motoki Kino CONTENTS SUPERLUMINAL RADIO FEATURES IN THE M87 JET AND THE S!ITE OF FLARING TeV GAMMA-RAY EMISSION C. C. Cheung, D. E. Harris, and L. 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Lin THE NONLINEAR EVOLUTION OF INSTABILITIES DRIVEN BY MAGNETIC BUOYANCY: A NEW MECHANISM FOR THE FORMATION OF COHERENT MAGNETIC STRUCTURES Evy Kersalé, David W. Hughes, and Steven M. Tobias INSTRUCTIONS TO AUTHORS OF LETTERS, AND ADDITIONAL USEFUL INFORMATION Inside Back Cover INSTRUCTIONS FOR ELECTRONIC MANUSCRIPT SUBMISSION Back Cover