Free access Dust-penetrated morphology in the high-redshift universe: Clues from NGC 922    p. 393 D. L. Block, I. Puerari, M. Takamiya, R. Abraham, A. Stockton, I. Robson and W. Holland DOI: http://dx.doi.org/10.1051/0004-6361:20010081 Abstract Full HTML PDF (1.01 MB) PS (5.12 MB) References SIMBAD record NASA ADS Abstract Service

Free access On the metallicities of UM 133, UM 283 and UM 382    p. 404 A. Y. Kniazev, S. A. Pustilnik, A. V. Ugryumov and A. G. Pramsky DOI: http://dx.doi.org/10.1051/0004-6361:20010277 Abstract Full HTML PDF (182 KB) PS (180 KB) References SIMBAD record NASA ADS Abstract Service

Free access The M 31 double nucleus probed with OASIS and HST - A natural m = 1 mode?    p. 409 R. Bacon, E. Emsellem, F. Combes, Y. Copin, G. Monnet and P. Martin DOI: http://dx.doi.org/10.1051/0004-6361:20010317 Abstract Full HTML PDF (618 KB) PS (1.28 MB) References SIMBAD record NASA ADS Abstract Service

Free access Research Note Is SBS 0335-052 a young galaxy?    p. 429 G. Östlin and D. Kunth DOI: http://dx.doi.org/10.1051/0004-6361:20010326 Abstract Full HTML PDF (128 KB) PS (153 KB) References SIMBAD record NASA ADS Abstract Service

Free access CI and CO in the spiral galaxies NGC 6946 and M 83    p. 433 F. P. Israel and F. Baas DOI: http://dx.doi.org/10.1051/0004-6361:20010354 Abstract Full HTML PDF (488 KB) PS (440 KB) References SIMBAD record NASA ADS Abstract Service

Free access The new sample of Giant radio sources - I. Radio imaging, optical identification and spectroscopy of selected candidates    p. 445 J. Machalski, M. Jamrozy and S. Zola DOI: http://dx.doi.org/10.1051/0004-6361:20010352 Abstract Full HTML PDF (3.05 MB) PS (2.27 MB) References SIMBAD record NASA ADS Abstract Service

Free access Dark haloes in Karachentsev's sample of binary galaxies    p. 470 P. Teerikorpi DOI: http://dx.doi.org/10.1051/0004-6361:20010394 Abstract Full HTML PDF (415 KB) PS (525 KB) References NASA ADS Abstract Service

Free access Hydrodynamic simulations of the triaxial bulge of M 31    p. 476 S. Berman DOI: http://dx.doi.org/10.1051/0004-6361:20010391 Abstract Full HTML PDF (992 KB) PS (574 KB) References SIMBAD record NASA ADS Abstract Service

Free access Tip of the red giant branch distance for the Sculptor group dwarf ESO 540-032    p. 487 H. Jerjen and M. Rejkuba DOI: http://dx.doi.org/10.1051/0004-6361:20010389 Abstract Full HTML PDF (796 KB) PS (1.27 MB) References SIMBAD record NASA ADS Abstract Service

Free access A Catalog of OB Associations in the spiral galaxy NGC 300    p. 497 G. Pietrzyński, W. Gieren, P. Fouqué and F. Pont DOI: http://dx.doi.org/10.1051/0004-6361:20010401 Abstract Full HTML PDF (1.24 MB) PS (500 KB) References SIMBAD record NASA ADS Abstract Service

Free access A two-phase model for the narrow line region of NGC 4151    p. 507 S. Komossa DOI: http://dx.doi.org/10.1051/0004-6361:20010404 Abstract Full HTML PDF (126 KB) PS (135 KB) References SIMBAD record NASA ADS Abstract Service

Free access Extreme synchrotron BL Lac objects - Stretching the blazar sequence    p. 512 L. Costamante, G. Ghisellini, P. Giommi, G. Tagliaferri, A. Celotti, M. Chiaberge, G. Fossati, L. Maraschi, F. Tavecchio, A. Treves and A. Wolter DOI: http://dx.doi.org/10.1051/0004-6361:20010412 Abstract Full HTML PDF (572 KB) PS (385 KB) References SIMBAD record NASA ADS Abstract Service

Free access An X-ray selected sample of radio-loud quasars    p. 527 A. Wolter and A. Celotti DOI: http://dx.doi.org/10.1051/0004-6361:20010415 Abstract Full HTML PDF (268 KB) PS (254 KB) References SIMBAD record NASA ADS Abstract Service

Free access Restoring the full velocity field in the gaseous disk of the spiral galaxy NGC 157    p. 538 A. M. Fridman, O. V. Khoruzhii, V. V. Lyakhovich, O. K. Sil'chenko, A. V. Zasov, V. L. Afanasiev, S. N. Dodonov and J. Boulesteix DOI: http://dx.doi.org/10.1051/0004-6361:20010392 Abstract Full HTML PDF (1.36 MB) PS (1.02 MB) References SIMBAD record NASA ADS Abstract Service

Free access A search for faint galactic carbon stars from the First Byurakan Spectral Sky Survey. I.    p. 560 K. Gigoyan, N. Mauron, M. Azzopardi, G. Muratorio and H. V. Abrahamyan DOI: http://dx.doi.org/10.1051/0004-6361:20010397 Abstract Full HTML PDF (1.55 MB) PS (1.27 MB) References SIMBAD record NASA ADS Abstract Service

Free access Search for short-period variable stars in the open cluster NGC 2301    p. 571 S.-L. Kim, M.-Y. Chun, B.-G. Park, S. H. Lee, H. Sung, H. B. Ann, M. G. Lee, Y.-B. Jeon and I.-S. Yuk DOI: http://dx.doi.org/10.1051/0004-6361:20010403 Abstract Full HTML PDF (683 KB) PS (560 KB) References SIMBAD record NASA ADS Abstract Service

Free access Empirical relations for cluster RR Lyrae stars revisited    p. 579 G. Kovács and A. R. Walker DOI: http://dx.doi.org/10.1051/0004-6361:20010346 Abstract Full HTML PDF (573 KB) PS (300 KB) References Tables at CDS SIMBAD record NASA ADS Abstract Service

Free access Period -magnitude relationships in BVIJHK-bands for fundamental mode and first overtone Cepheids    p. 592 I. Baraffe and Y. Alibert DOI: http://dx.doi.org/10.1051/0004-6361:20010360 Abstract Full HTML PDF (423 KB) PS (257 KB) References SIMBAD record NASA ADS Abstract Service

Free access Spectroscopy of B-type emission-line stars with compact dusty envelopes: HD 85567, Hen 3-140, and Hen 3-1398    p. 600 A. S. Miroshnichenko, H. Levato, K. S. Bjorkman and M. Grosso DOI: http://dx.doi.org/10.1051/0004-6361:20010365 Abstract Full HTML PDF (455 KB) PS (566 KB) References SIMBAD record NASA ADS Abstract Service

Free access SX Phœnicis stars in the core of 47 Tucanae    p. 614 H. Bruntt, S. Frandsen, R. L. Gilliland, J. Christensen-Dalsgaard, J. O. Petersen, P. Guhathakurta, P. D. Edmonds and G. Bono DOI: http://dx.doi.org/10.1051/0004-6361:20010369 Abstract Full HTML PDF (2.55 MB) PS (844 KB) References SIMBAD record NASA ADS Abstract Service

Free access The brightness variations and orbital period changes of RT Lacertae    p. 626 C. İbanoǧlu, S. Evren, G. Taş, A. Devlen and Ö. Çakırlı DOI: http://dx.doi.org/10.1051/0004-6361:20010413 Abstract Full HTML PDF (218 KB) PS (683 KB) References SIMBAD record NASA ADS Abstract Service

Free access Variability in the extreme helium star LSS 5121    p. 638 V. M. Woolf, R. Aznar Cuadrado, G. Pandey and C. S. Jeffery DOI: http://dx.doi.org/10.1051/0004-6361:20010378 Abstract Full HTML PDF (180 KB) PS (205 KB) References SIMBAD record NASA ADS Abstract Service

Free access A representative sample of Be stars III: H band spectroscopy    p. 643 I. A. Steele and J. S. Clark DOI: http://dx.doi.org/10.1051/0004-6361:20010381 Abstract Full HTML PDF (319 KB) PS (283 KB) References SIMBAD record NASA ADS Abstract Service

Free access The effect of stellar activity on the Li I 6708, Na I 5896 and K I 7699 Ålines - A comparison with the Pleiades, field stars and the Sun    p. 652 D. Barrado y Navascués, R. J. García López, G. Severino and M. T. Gomez DOI: http://dx.doi.org/10.1051/0004-6361:20010409 Abstract Full HTML PDF (377 KB) PS (249 KB) References SIMBAD record NASA ADS Abstract Service

Free access Period-doubling behavior in very slow classical cepheid models    p. 667 T. Aikawa DOI: http://dx.doi.org/10.1051/0004-6361:20010430 Abstract Full HTML PDF (451 KB) PS (237 KB) References SIMBAD record NASA ADS Abstract Service

Free access Research Note The 1584 day period in the Be Star LSI +61 303    p. 672 K. M. V. Apparao DOI: http://dx.doi.org/10.1051/0004-6361:20010437 Abstract Full HTML PDF (84.0 KB) PS (114 KB) References SIMBAD record NASA ADS Abstract Service

Free access The Cygnus superbubble revisited    p. 675 B. Uyanıker, E. Fürst, W. Reich, B. Aschenbach and R. Wielebinski DOI: http://dx.doi.org/10.1051/0004-6361:20010387 Abstract Full HTML PDF (2.72 MB) PS (3.07 MB) References SIMBAD record NASA ADS Abstract Service

Free access The spin temperature of warm interstellar H I    p. 698 H. Liszt DOI: http://dx.doi.org/10.1051/0004-6361:20010395 Abstract Full HTML PDF (235 KB) PS (230 KB) References NASA ADS Abstract Service

Free access The angular power spectrum of radio emission at 2.3 GHz    p. 708 G. Giardino, A. J. Banday, P. Fosalba, K. M. Górski, J. L. Jonas, W. O'Mullane and J. Tauber DOI: http://dx.doi.org/10.1051/0004-6361:20010384 Abstract Full HTML PDF (634 KB) PS (543 KB) References NASA ADS Abstract Service

Free access Dynamical variations of the differential rotation in the solar convection zone    p. 718 E. Covas, R. Tavakol and D. Moss DOI: http://dx.doi.org/10.1051/0004-6361:20010345 Abstract Full HTML PDF (419 KB) PS (431 KB) References NASA ADS Abstract Service

Free access Submergence of magnetic flux in interaction of sunspot groups    p. 731 B. Kálmán DOI: http://dx.doi.org/10.1051/0004-6361:20010429 Abstract Full HTML PDF (454 KB) PS (1.29 MB) References NASA ADS Abstract Service

Free access The relation between cyclotron heating and energetic particles on open coronal field lines    p. 738 R. Vainio and T. Laitinen DOI: http://dx.doi.org/10.1051/0004-6361:20010411 Abstract Full HTML PDF (201 KB) PS (166 KB) References NASA ADS Abstract Service

Free access CCD photometry, spin and shape model of the asteroid 1572 Posnania    p. 748 T. Michałowski, W. Pych, T. Kwiatkowski, A. Kryszczyńska, P. Pravec, W. Borczyk, A. Erikson, W. Wisniewski, F. Colas and J. Berthier DOI: http://dx.doi.org/10.1051/0004-6361:20010372 Abstract Full HTML PDF (131 KB) PS (126 KB) References NASA ADS Abstract Service

Free access Photometric study of Centaurs 10199 Chariklo (1997 CU26) and 1999 UG5    p. 753 N. Peixinho, P. Lacerda, J. L. Ortiz, A. Doressoundiram, M. RoosSerote and P. J. Gutiérrez DOI: http://dx.doi.org/10.1051/0004-6361:20010382 Abstract Full HTML PDF (109 KB) PS (115 KB) References NASA ADS Abstract Service

Free access Progress in the determination of some astronomical constants from radiometric observations of planets and spacecraft    p. 760 E. V. Pitjeva DOI: http://dx.doi.org/10.1051/0004-6361:20010399 Abstract Full HTML PDF (106 KB) PS (116 KB) References NASA ADS Abstract Service

Free access Space-VLBI phase-reference mapping and astrometry    p. 766 J. C. Guirado, E. Ros, D. L. Jones, J.-F. Lestrade, J. M. Marcaide, M. A. Pérez-Torres and R. A. Preston DOI: http://dx.doi.org/10.1051/0004-6361:20010370 Abstract Full HTML PDF (1.56 MB) PS (667 KB) References SIMBAD record NASA ADS Abstract Service