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Astronomy and Astrophysics

Vol. 371, No. 2 (May IV 2001)

Radio and X-ray emission (contours) from the Cygnus Superbubble (Uyaniker, B., et al., p. 688)
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-  Extragalactic astronomy
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

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

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

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

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

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

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

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

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

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

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

Extreme synchrotron BL Lac objects - Stretching the blazar sequence     p. 512
L. Costamante et al.
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

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


-  Galactic structure and dynamics
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

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


-  Stellar clusters and associations
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


-  Formation, structure and evolution of stars
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

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

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

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

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

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

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

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

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

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


-  Diffuse matter in space
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

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

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


-  The Sun
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

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

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


-  The solar system
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

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


-  Celestial mechanics and astrometry
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


-  Instruments, observational techniques and data processing
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