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THE ASTROPHYSICAL JOURNAL LETTERS CONTENTS OF VOLUME 488, PART 2 1997 OCTOBER 10, Number 1 THE VELOCITY FIELD FROM TYPE Ia SUPERNOVAE MATCHES THE GRAVITY FIELD FROM GALAXY SURVEYS Adam G. Riess, Marc Davis, Jonathan Baker, & Robert P. Kirshner THE IMPLICATIONS OF DIRECT REDSHIFT MEASUREMENT OF GAMMA-RAY BURSTS Ehud Cohen & Tsvi Piran THE FAINT END OF THE LUMINOSITY FUNCTION OF GALAXIES IN HICKSON GROUPS Stephen E. Zepf, Reinaldo R. de Carvalho, & André L. B. Ribeiro THE CLUSTER OF GALAXIES SURROUNDING CYGNUS A Frazer N. Owen, Michael J. Ledlow, Glenn E. Morrison, & John M. Hill DISCOVERY OF A LUMINOUS QUASAR IN THE NEARBY UNIVERSE Carlos A. O. Torres, Germano R. Quast, Roger Coziol, Francisco Jablonski, Ramiro de la Reza, J. R. D. Lépine, & J. Gregério-Hetem POSSIBLE NEW IDENTIFICATIONS FOR EGRET SOURCES Steven D. Bloom, Robert C. Hartman, Harri Terdsranta, Merja Tornikoski, & Esko Valtaoja REDSHIFT DIFFERENCES BETWEEN THE BALMER AND (0 III] 45007 LINES IN HIGH-REDSHIFT QUASARS Eiji Nishihara, Takuya Yamashita, Michitoshi Yoshida, Etsuji Watanabe, Shin-ichiro Okumura, Atsushi Mori, & Masanori lye REDSHIFTED MOLECULAR ABSORPTION SYSTEMS TOWARD PKS 1830-211 AND B0218 +357: SUBMILLIMETER CO, C 1, AND H2O0 DATA Maryvonne Gerin, Thomas G. Phillips, Dominic J. Benford, Ken H. Young, Karl M. Menten, & Brenda Frye FURTHER CONSTRAINTS ON WHITE DWARF GALACTIC HALOS R. Canal, J. Isern, & P. Ruiz-Lapuente PHOTON-INDUCED COMPLETE DEHYDROGENATION OF PUTATIVE INTERSTELLAR POLYCYCLIC AROMATIC HYDROCARBON CATIONS: CORONENE AND NAPHTHO[2,3-aJPYRENE Scott P. Ekern, Alan G. Marshall, Jan Szczepanski, & Martin Vala THE MASS AND RADIUS OF 40 ERIDANI B FROM HIPPARCOS: AN ACCURATE TEST OF STELLAR INTERIOR THEORY H. L. Shipman, J. L. Provencal, Erik Hog, & P. Thejll RADIATION-INDUCED WARPING OF PROTOSTELLAR ACCRETION DISKS P. J. Armitage & J. E. Pringle SOLAR WIND STREAM INTERACTIONS AND THE WIND SPEED-EXPANSION FACTOR RELATIONSHIP Y.-M. Wang, N. R. Sheeley, Jr. J. L. Phillips, & B. E. Goldstein INSTRUCTIONS TO AUTHORS OF LETTERS, AND RECENT LETTERS ABSTRACTS AND OTHER Inside Back Cover BIBLIOGRAPHICAL SERVICES INSTRUCTIONS FOR ELECTRONIC MANUSCRIPT SUBMISSION Back Cover 1997 OCTOBER 20, Number 2 DARK BARYONS AND ROTATION CURVES Andreas Burkert & Joseph Silk CONTENTS DETECTION OF COSMIC MICROWAVE BACKGROUND ANISOTROPY BY THE THIRD FLIGHT OF THE MEDIUM-SCALE ANISOTROPY MEASUREMENT E. S. Cheng, D. A. Cottingham, D. J. Fixsen, A. B. Goldin, C. A. Inman, L. Knox, M. S. Kowitt, S. S. Meyer, J. L. Puchalla, J. E. Ruhl, & R. F. Silverberg FAST SPHERICAL HARMONIC ANALYSIS: A QUICK ALGORITHM FOR GENERATING AND/OR INVERTING FULL-SKY, HIGH-RESOLUTION COSMIC MICROWAVE BACKGROUND ANISOTROPY MAPS P. F. Muciaccia, P. Natoli, & N. Vittorio A 2.8 MILLIMETER SURVEY OF THE HUBBLE DEEP FIELD D. J. Wilner & M. C. H. Wright ON THE ORIGIN OF THE ULTRAVIOLET CONTINUUM IN SEYFERT 2 GALAXIES Luis Colina, Maria Luisa Garcia Vargas, Rosa M. Gonzalez Delgado, J. Miguel Mas-Hesse, Enrique Pérez, Antxon Alberdi, & Alfred Krabbe STAR FORMATION IN CLUSTER GALAXIES AT 0.2 < z < 0.55 Mike L. Balogh, Simon L. Morris, H. K. C. Yee, R. G. Carlberg, & Erica Ellingson MOLECULAR LINES AS DIAGNOSTICS OF HIGH-REDSHIFT OBJECTS Joseph Silk & Marco Spaans THE SOUTHERN SHARC SURVEY: THE z = 0.3-0.7 CLUSTER X-RAY LUMINOSITY FUNCTION D. J. Burke, C. A. Collins, R. M. Sharples, A. K. Romer, B. P- Holden, & R. C. Nichol PHENOMENOLOGY OF THE LOCAL ANGULAR DIAMETER TO REDSHIFT RELATION I. E. Segal & J. F- Nicoll ON THE DEPENDENCE OF THE IRON K-LINE PROFILES WITH LUMINOSITY IN ACTIVE GALACTIC NUCLEI K. Nandra, I. M. George, R. F. Mushotzky, T. J. Turner, & T: Yaqoob THE FADING OF YOUNG STELLAR POPULATIONS AND THE LUMINOSITY FUNCTIONS OF DWARF, IRREGULAR, AND STARBURST GALAXIES David W. Hogg & E. S. Phinney DETECTION OF THE 2175 A DUST FEATURE IN Mg II ABSORPTION SYSTEMS Sangeeta Malhotra THE AFTERGLOW OF GAMMA-RAY BURSTS: THE CASES OF GRB 970228 AND GRB 970508 Mario Vietri A UNIFIED MODEL FOR THE SPECTRAL VARIABILITY IN GRS 1915+105 T. Belloni, M. Méndez, A. R. King, M. van der Klis, & J. van Paradijs RELATIVISTICALLY SMEARED X-RAY REPROCESSED COMPONENTS IN THE GINGA SPECTRA OF GS 202+3 33 8 Piotr T. Zycki, Chris Done, & David A. Smith ON THE DRAMATIC SPIN-UP/SPIN-DOWN TORQUE REVERSALS IN ACCRETING PULSARS Robert W. Nelson, Lars Bildsten, Deepto Chakrabarty, Mark H. Finger, Danny T. Koh, Thomas A. Prince, Bradley C. Rubin, D. Mathew Scott, Brian A. Vaughan, & Robert B. Wilson LOW SURFACE BRIGHTNESS RADIO STRUCTURE IN THE FIELD OF GRAVITATIONAL LENS 0957 +561 I. M. Avruch, A. S. Cohen, J. Lehar, S. R. Conner, D. B. Haarsma, & B. F. Burke NEW MEASUREMENT OF METAL ABUNDANCE IN THE ELLIPTICAL GALAXY NGC 4636 WITH ASCA Kyoko Matsushita, Kazuo Makishima, Etsuko Rokutanda, Noriko Y. Yamasaki, & Takaya Ohashi THE DYNAMICS OF THE LARGE MAGELLANIC CLOUD PERIPHERY: MASS LIMIT AND POLAR RING William E. Kunkel, Serge Demers, M. J. Irwin, & Loic Albert ORIGIN AND EVOLUTION OF THE UNUSUAL OBJECT 1996 PW: ASTEROIDS FROM THE OORT CLOUD? Paul R. Weissman & Harold F. Levison LABORATORY DETECTION AND SUBMILLIMETER SPECTRUM OF THE NaS RADICAL (X°I1;) B.-Z. Li & L. M. Ziurys DISCOVERY OF INTERSTELLAR HYDROGEN FLUORIDE David A. Neufeld, Jonas Zmuidzinas, Peter Schilke, & Thomas G. Phillips MOLECULAR CLOUDS ARE NOT FRACTAL: A CHARACTERISTIC SIZE SCALE IN TAURUS Leo Blitz & Jonathan P. Williams CONTENTS HYDRODYNAMICAL ACCRETION ONTO SAGITTARIUS A* FROM DISTRIBUTED POINT SOURCES Robert F. Coker & Fulvio Melia HIPPARCOS, VLA, AND CCD OBSERVATIONS OF CYGNUS OB2 NO. 5: SOLVING THE MYSTERY OF THE RADIO “COMPANION” M. E. Contreras, L. F: Rodriguez, M. Tapia, D. Cardini, A. Emanuele, M. Badiali, & P. Persi NEUTRAL CARBON IN THE PROTOPLANETARY NEBULAE CRL 618 AND CRL 2688 K. Young WHOLE-DISK OBSERVATIONS OF JUPITER, SATURN, AND MARS IN MILLIMETER/SUBMILLIMETER BANDS A. B. Goldin, M. S. Kowitt, E. S. Cheng, D. A. Cottingham, D. J. Fixsen, C. A. Inman, S. S. Meyer, J. L. Puchalla, J. E. Ruhl, & R. F. Silverberg INSTRUCTIONS TO AUTHORS OF LETTERS, AND RECENT LETTERS ABSTRACTS AND OTHER Inside Back Cover BIBLIOGRAPHICAL SERVICES INSTRUCTIONS FOR ELECTRONIC MANUSCRIPT SUBMISSION Back Cover