Vol. 43 No. 1 (2007)

J. García-Rojas, C. Esteban, A. Peimbert, M. Rodríguez, M. Peimbert, M. T. Ruiz

3-31

The chemical composition of the Galactic H II regions M8 and M17. A revision based on deep VLT echelle spectrophotometry

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B. Vukotic, B. Arbutina, D. Urosevic

33-43

On the Magnetic Field Evolution in Shell-like Supernova Remnants

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H. M. Tovmassian, H. Tiersch, H. Gaghik, G. H. Tovmassian, V. H. Chavushyan, S. Neizvestny, A. G. Pramskij, J. P. Torres-Papaqui, M. Rozas

45-57

Photometric and spectroscopic study of Shakhbazian compact galaxy groups ShCG 104, ShCG 120, ShCG 223, and ShCG 245

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L. Zaninetti

59-87

Physical mechanisms that shape the morphologies of extragalactic jets

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F. Cruz, L. Aguilar

89-94

Tidal heating: A restricted three body problem investigation of the Spitzer and Weinberg approximations

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F. Cruz, H. Velázquez, H. Aceves

95-100

Morphology and Kinematics of Gravitational Cold Collapse around a Central Supermassive Black Hole

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X. -G. Zhang, D. Dultzin-Hacyan, T. -G. Wang

101-121

The properties of optical FeII emission lines of AGN with double-peaked broad emission lines

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J. Ballesteros-Paredes, L. Hartmann

123-136

Remarks on Rapid vs. Slow Star Formation

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V. G. Orlov, V. V. Voitsekhovich, L. J. Sánchez, F. Garfias

137-140

First Speckle Interferometry Measurements of Binary Stars at the OAN-Tonantzintla

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J. A. Docobo, M. Andrade, V. S. Tamazian, M. T. Costado, J. F. Lahulla

141-147

Binary Star Speckle Measurements with the 1.52-m telescope at Calar Alto

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L. F. Rodríguez, L. Zapata, P. T. P. Ho

149-154

Radio Continuum Sources Associated with AB Aur

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T. López-Chico, L. Salas

155-171

Mass determination for T Tauri stars from JHK Photometry

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L. F. Rodríguez, Y. Gómez

173-177

Proper Motions of the Ansae in the Planetary Nebula NGC7009

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N. D. Roche

179-189

The Kinematics of Arp 295 in Hα Emission: an Interacting Galaxy with Highly Asymmetric Rotation

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E. A. Huerta, S. Mendoza

191-202

A simple accretion model of a rotating gas sphere onto a Schwarzschild black hole

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C. Firmani, V. Avila-Reese, G. Ghisellini, G. Ghirlanda

203-216

Long Gamma-Ray Burst prompt emission properties as a cosmological tool

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J. H. Peña, J. P. Sareyan, B. Cervantes-Sodi, R. Peña, M. Alvarez, M. Cano, M. A. Sorcia

217-224

HD 115520, a new δ Scuti star

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D. Hiriart, L. Salas

225-231

Water Vapor Corrections to Mid-Infrared Photometry

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Research articles