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THE ASTROPHYSICAL JOURNAL LETTERS CONTENTS OF VOLUME 621, PART 2 2005 MARCH 1, NUMBER | CO (1-0) AND CO (5-4) OBSERVATIONS OF THE MOST DISTANT KNOWN RADIO GALAXY AT z = 5.2 I. J. Klamer, R. D. Ekers, E. M. Sadler, A. Weiss, R. W. Hunstead, and C. De Breuck THE IRON LINE BACKGROUND © Marcella Brusa, Roberto Gilli, and Andrea Comastri A DISCOVERY OF RAPID OPTICAL FLARES FROM LOW-LUMINOSITY ACTIVE NUCLEI IN MASSIVE GALAXIES Tomonori Totani, Takahiro Sumi, George Kosugi, Naoki Yasuda, Mamoru Doi, and Takeshi Oda RADIO COMPACT STRUCTURE IN OQ 208 Guiying Xie, D. R. Jiang, and Z.-Q. Shen A 2 HOUR QUASI PERIOD IN AN ULTRALUMINOUS X-RAY SOURCE IN NGC 628 Ji-Feng Liu, Joel N. Bregman, Ed Lloyd-Davies, Jimmy Irwin, Catherine Espaillat, and Patrick Seitzer THE NATURE OF RADIO CONTINUUM EMISSION AT VERY LOW METALLICITY: VERY LARGE ARRAY OBSERVATIONS OF I Zw 18 John M. Cannon, Fabian Walter, Evan D. Skillman, and Liese van Zee ON THE NATURE OF X-RAY SOURCES IN EARLY-TYPE GALAXIES Adrienne M. Juett HIGH-LATITUDE MOLECULAR CLOUDS AS GAMMA-RAY SOURCES FOR THE GAMMA-RAY LARGE AREA SPACE TELESCOPI Diego F. Torres, T. M. Dame, and Seth W. Digel COMPETITION BETWEEN CO AND N, DESORPTION FROM INTERSTELLAR ICES © K. I. Oberg, F. van Broekhuizen, H. J. Fraser, S. E. Bisschop, E. F. van Dishoeck, and S. Schlemmer ARE SUPERNOVA KICKS RESPONSIBLE FOR X-RAY BINARY EJECTION FROM YOUNG CLUSTERS? © J. Sepinsky, V. Kalogera, and K. Belczynski EFFECTS OF GRAVITATIONAL LENSING IN THE DOUBLE PULSAR SYSTEM J0737—3039 Dong Lai and Roman R. Rafikov SPECTRAL FORMATION IN X-RAY PULSAR ACCRETION COLUMNS Peter A. Becker and Michael T. Wolff THE MEAN PULSE PROFILE OF PSR JO737—3039A R. N. Manchester, M. Kramer, A. Possenti, A. G. Lyne, M. Burgay, I. H. Stairs, A. W. Hotan, M. A. McLaughlin, D. R. Lorimer, G. B. Hobbs J. M. Sarkissian, N. D’Amico, F. Camilo, B. C. Joshi, and P. C. C. Freire A TEST OF NOVA TRIGGER THEORY Bradley E. Schae fei SUPER-HELIUM-RICH POPULATIONS AND THE ORIGIN OF EXTREME HORIZONTAL-BRANCH STARS IN GLOBULAR CLUSTERS Young-Wook Lee, Seok-Joo Joo, Sang-ll Han, Chul Chung, Chang H. Ree, Young-Jong Sohn, Yong-Cheol Kim, Suk-Jin Yoon, Sukyoung K. Yi and Pierre Demarque WHITING 1: A NEW HALO YOUNG GLOBULAR CLUSTER L6l Giovanni Carraro A LONG-LIVED ACCRETION DISK AROUND A LITHIUM-DEPLETED BINARY T TAURI STAR L65 Russel J. White and Lynne A. Hillenbrand CAN GIANT PLANETS FORM BY DIRECT GRAVITATIONAL INSTABILITY? L69 Roman R. Rafikov DUST DESTRUCTION AND ION FORMATION IN THE INNER SOLAR SYSTEM Ingrid Mann and Andrzej Czechowski NEW RESULTS IN MODELING THE HEMISPHERIC PATTERN OF SOLAR FILAMENTS D. H. Mackay and A, A. van Ballegooijen SUNSPOT UNIT AREA: A NEW PARAMETER TO DESCRIBE LONG-TERM SOLAR VARIABILITY © K. J. Li, J. Qiu, T. W. Su, and P. X. Gao NEW SOLAR OPACITIES, ABUNDANCES, HELIOSEISMOLOGY, AND NEUTRINO FLUXES John N. Bahcall, Aldo M. Serenelli, and Sarbani Basu ill CONTENTS INSTRUCTIONS TO AUTHORS OF LETTERS, AND ADDITIONAL USEFUL INFORMATION Inside Back Cover INSTRUCTIONS FOR ELECTRONIC MANUSCRIPT SUBMISSION Back Cover 2005 MARCH 10, NUMBER 2 SPECIFIC STAR FORMATION RATES TO REDSHIFT 1.5 1. E. Bauer, N. Drory, G. J. Hill, and G. Feulner DETECTION OF INTRACLUSTER PLANETARY NEBULAE IN THE COMA CLUSTER © Orn ferhard, Magda Arnaboldi, Kenneth C. Freeman, Nobunari Kashikawa, Sadanori Okamura, and Naoki Yasuda THE FIRST OPTICAL VALIDATION OF AN X-RAY LINE-EMITTING OBJECT: A DETECTION IN THE XMM-NEWTON OBSERVATION OF THE CHANDDEERP FAIE LD-SOUTH © V. Braito, T. Maccacaro, A. Caccianiga, P. Severgnini, and R. Della Ceca LOSS CONE REFILLING RATES IN GALACTIC NUCLEI David Merritt and Jianxiang Wang 4 DISTINCT STRUCTURE INSIDE THE GALACTIC BAR Shogo Nishivama, Tetsuya Nagata, Daisuke Baba, Yasuaki Haba, Ryota Kadowaki, Daisuke Kato, Mikio Kurita, Chie Nagashima, Takahiro Nagayama, Yuka Murai, Yasushi Nakajima, Motohide Tamura, Hidehiko Nakaya, Koji Sugitani, Takahiro Naoi, Vorivuki Matsunaga, Toshihiko Tanabé, Nobuhiko Kusakabe, and Shuji Sato FORMATION OF ULTRACOMPACT X-RAY BINARIES IN DENSE STAR CLUSTERS V. Ivanova, F. A. Rasio, J. C. Lombardi, Jr., K. L. Dooley, and Z. F. Proulx REVISED ORBITAL PARAMETERS OF THE ACCRETING MILLISECOND PULSAR SAX J1808.4—3658 1. Papitto, M. T. Menna, L. Burderi, T. Di Salvo, F. D’Antona, and N. R. Robba THE DISCOVERY OF MORE THAN 2000 WHITE DWARFS IN THE GLOBULAR CLUSTER w CENTAURI VM. Monelli, C. E. Corsi, V. Castellani, 1. Ferraro, G. lannicola, P. G. Prada Moroni, G. Bono, R. Buonanno, A. Calamida, L. M. Freyhammer, L. Pulone, and P. B. Stetson CRYSTALLINE Si NANOPARTICLES AS CARRIERS OF THE BLUE LUMINESCENCE IN THE RED RECTANGLE NEBULA Munir H. Nayfeh, Shadia Rifai Habbal, and Satish Rao FLARE X-RAY OBSERVATIONS OF AB DORADUS: EVIDENCE OF STELLAR CORONAL OPACITY VM. Matranga, M. Mathioudakis, H. R. M. Kay, and F. P. Keenan SPITZER IRS SPECTRA OF YOUNG STARS NEAR THE HYDROGEN-BURNING MASS LIMIT © E. Furlan, N. Calvet, P. D’Alessio, L. Hartmann, W. J. Forrest, D. M. Watson, K. L. Luhman, K. I. Uchida, J. D. Green, B. Sargent, J. Najita, G. C. Sloan, L. D. Keller, and T. L. Herter IRAS 16293—2422B: A COMPACT, POSSIBLY ISOLATED PROTOPLANETARY DISK IN A CLASS 0 OBJECT Luis F. Rodriguez, Laurent Loinard, Paola D'Alessio, David J. Wilner, and Paul T. P. Ho CHONDRULE-FORMING SHOCK FRONTS IN THE SOLAR NEBULA: A POSSIBLE UNIFIED SCENARIO FOR PLANET AND CHONDRITE FORMATION © 4. P. Boss and R. H. Durisen THE UPPER LIMIT ON ‘He FLUENCE IN SOLAR ENERGETIC PARTICLE EVENTS G. C. Ho, E. C. Roelof, and G. M. Mason FULL STOKES SPECTROPOLARIMETRY OF Ha IN PROMINENCES \. Lopez Ariste, R. Casini, F. Paletou, 8S. Tomezyk, B. W. Lites, M. Semel, E. Landi Degl’ Innocenti, J. Trujillo Bueno, and K. §. Balasubramaniam THE LOCAL HELIOSEISMOLOGY OF INCLINED MAGNETIC FIELDS AND THE SHOWERGLASS EFFECT H. Schunker, D. C. Braun, P. S. Cally, and C. Lindsey HELIOSEISMIC DETERMINATION OF THE SOLAR ROTATION AXIS J. G. Beck and P. Giles DETECTION OF SiCCO IN THE LABORATORY M. Eugenia Sanz, José L. Alonso, Susana Blanco, Alberto Lesarri, and Juan C. Lépez INSTRUCTIONS TO AUTHORS OF LETTERS, AND ADDITIONAL USEFUL INFORMATION Inside Back Cover INSTRUCTIONS FOR ELECTRONIC MANUSCRIPT SUBMISSION Back Cover