Table Of Content

Volume 242 1991 Contents Letters to the Editor A possible origin of the superluminal knots de Gouveia Dal Pino, E.M., Opher, R. Generation of shocks by radiation pressure on newly formed circumstellar dust A rotation curve study of the dwarf Sc galaxy UGC 2259 Fleischer, A.J., Gauger, A., Sedlmayr, E. Li Gonzdles-Serrano, J.1., Valentijn, E.A. Interplanetary transport of solar cosmic rays and dissipa- Evolutionary synthesis models of star bursts in blue com- tion of Alfvén waves pact dwarf galaxies Schlickeiser, R., Dung, R., Jaekel, U. Kriiger, H., Fritze-von Alvensleben, U., Loose, H.-H., Fricke, K.J. Ha absorption in the type-Ia supernova 1990 M during its early phase The nuclear H1i gas in the star-burst galaxy NGC 3310 Polcaro, V.F., Viotti, R. extended radial motions or a merger? Grothues, H.G., Schmidt-Kaler, T. Inference of “bumps” in electron energy spectra from high resolution X-ray bremsstrahlung spectra First detection of molecular gas near the center of M 81 Brown, J.C., MacKinnon, A.L., van den Oord, G.H.J., Sage, L.J., Westpfahl, D.J. Trottet, G. L13 Concerning the reddening of the Magellanic Clouds Galactic structure and dynamics Bessell, M.S. L17 Hydrodynamics in a collapsing gaseous protogalaxy Cosmology Hiotelis, N., Voglis, N., Contopoulos, G. Against the In(i+z)~0.205 periodicity in quasar red- The solar motion. I. From radial velocities shifts Jaschek, C., Valbousquet, A. Scott, D. A three-fluid static galactic halo model in flux-tube formu- (RN) Analytic volumes and maximum volumes for any gp lation in standard Friedmann cosmology Chung-Ming Ko Mathez, G., Kassiola, A., Lachiéze-Rey, M. The Hi region G 0.18-0.04: ionization of a molecular cloud by impact with a strong magnetic field Extragalactic astronomy Serabyn, E., Giisten, R. A Malmquist corrected color-magnitude relation for spiral galaxies .ormation, structure and evolution of stars Christensen, J.H. The relative numbers of Wolf-Rayet stars in galaxies with X-ray observations of the broad line radio galaxy 3C 382: active star formation: the metallicity effect variability, an iron line and soft X-ray emission Maeder, A. Kaastra, J.S., Kunieda, H., Awaki, H. Spot variability of solar-type stars in the Pleiades. I. The M81: CO content and interaction with its companion G2/V-type stars HII-314, HII-996, and HII-1207 galaxies Panov, K.P., Geyer, E.H. Brouillet, N., Baudry, A., Combes, F., Kaufman, M., Bash, F. Separation of the polarization modes in PSR 0823 + 26 Gil, J.A., Snakowski, J.K., Stinebring, D.R. Relationship between Fel! and radio emission in active galactic nuclei (RN) Is it possible to evaporate the companion stars of ul- Joly, M. tra-rapid pulsars? Ergma, E.V., Fedorova, A.V. Morphology and kinematics of the pair of interacting ellip- tical galaxies NGC 4782 and NGC 4783 Radio pulsars and the scale height of ionized hydrogen Madejsky, R., Bender, R., Méllenhoff, C. Bhattacharya, D., Verbunt, F. Photometric observations of the warped disks of NGC Infrared and optical CCD images of the young cluster as- 4013, NGC 4565 and NGC 6504 sociated with GM 24 Florido, E., Prieto, M., Battaner, E., Mediavilla, E., Tapia, M., Roth, M., Lopez, J.A., Rubio, M., Persi, P.., Sanchez-Saavedra, M.L. Ferrari-Toniolo, M. 1803 +784: a BL Lacertae object with remarkable radio CCD photometry of the SU Ursae Majoris cataclysmic properties variable SS Ursae Minoris (PG 1551 +719) Strom, R.G., Biermann, P.L. Chen, J.-S., Liu, X.-W., Wei, M.-Z. IV Walraven photometry of WX Hydri during quiescence and Ammonia formation and the ortho-to-para ratio of H, in outburst dark clouds Kuulkers, E., Hollander, A., Oosterbroek, T.., Le Bourlot, J. van Paradijs, J. Phosphorus chemistry in dense interstellar clouds Subluminous WR and luminous blue variable stars Millar, T.J. Lortet, M.-C CO observations of southern protoplanetary nebulae with Distribution of turned-off pulsars and consequences for optical counterparts gamma-ray burst sources Bujarrabal, V., Bachiller, R. Greiner, J Correlation between the very broad structure and the con- Optical outburst image inside the gamma-ray burst source tinuum in FUV extinction curves 0008 + 13 error box Reimann, H.-G., Friedemann, C. Greiner, J., Naumann, C., Wenzel, VV Infrared imaging photometry of binary T Tauri stars The Sun Moneti, A., Zinnecker, H Collisional scattering of fast electrons in a coronal mag- Variability of the post-AGB star HR 4049: dust obscur- netic bottle ation in a binary system MacKinnon, A.L. Waelkens, C., Lamers, H.J.G.L.M., Waters, L.B.F.M., Rufener, F., Trams, N.R., Le Bertre, T., Ferlet, R., Phases and amplitudes of acoustic-gravity waves. I. Up- Vidal-Madjar, A ward and downward solutions Marmolino, C., Severino, G Angular velocities of sunspot-groups and solar photo- Stellar atmospheres spheric rotation Temperature and density dependence of the Lyman « line Zappala, R.A., Zuccarello, F. wing in hydrogen-rich white dwarf atmospheres Vibration-rotation bands of CH in the solar infrared spec- Allard, N.., Kielkopf, J trum and the solar carbon abundance Numerical simulation of photospheric convection in solar- Grevesse, N., Lambert, D.L., Sauval, A.J., type stars. I. Hydrodynamical test calculations van Dishoeck, E.F., Farmer, C.B., Norton, R.H. Reile, C., Gehren, T The Spacelab-1 Very Wide Field Survey of UV-excess ob- The solar system jects. II. Analysis of 7 stars of various nature Viton, M., Deleuil, M., Tobin, W., Prévot, L., A comparison of two pole determination methods for aste- Bouchet, P roids Carbon and nitrogen abundances in the BN supergiant Tancredi, G., Gallardo, T. HD 93840, and their implications for normal Galactic Polarimetry of comet P/Halley: properties of dust supergiants Sen, A.K., Deshpande, M.R., Joshi, U.C., Rao, N.K., Massa, D., Altner, B., Wynne, D., Raveendran, A.V. Lamers, H.J.G.L.M The overall flux distribution of magnetic chemically pecu- Physical and chemical processes liar stars Leone, F., Catalano, F.A (RN) Turbulence induced relative velocity between two Magneto-optical effects from free electrons in magnetic grains white dwarfs Markiewicz, W.J., Mizuno, H., Vélk, H.J. Jordan, S., O'Connell, R.F., Koester, D Optically thin accretion discs Long-term behaviour of starspots. I. Polar starspots, rota- Dumont, A.M., Collin-Souffrin, S., King, A.R., tional modulation and flare activity of V833 Tauri Lasota, J.P. Olah, K., Pettersen, B.R. Investigation of the equation of state of astrophysical An automatic curve-of-growth method. Application of the bodies by the LMTO method T Tauri star $219 Godon, P., Shaviv, G., Ashkenazi, J., Kovetz, A. Franchini, M., Castelli, F., Stalio, R Study on the non-LTE effect of Fe in stellar atmospheres: Instruments, data processing, and computational methods application to Arcturus Takeda, Y. Fast solution of radiative transfer problems using a method of multiple grids Steiner, O. Diffuse matter in space (including Hi! regions and planetary nebulae) Error analysis of lightcurve periods Karttunen, H., Muinonen, K. Observational properties of p=1, /=1-+0 SiO masers Jewell, P.R., Snyder, L.E., Walmsley, C.M.., Wilson, T.L., Gensheimer, P.D. Papers accepted for publication in A. & A.