Vol. 48 No. 2 (2012)

L. Sabin, R. Vázquez, J. A. López, Ma. T. García-Díaz, G. Ramos-Larios

165-176

The filamentary multi-polar planetary nebula NGC 5189

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V. G. Orlov, V. V. Voitsekhovich, C. A. Guerrero

177-181

Speckle Interferometry at the Observatorio Astronómico Nacional. IV

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A. M. Hidalgo-Gámez, A. Moranchel-Basurto, A. F. González-Fajardo

183-197

Chemical abundances of late-type spiral galaxies from the SDSS

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A. C. Raga, J. Cantó, L. F. Rodríguez

199-207

New analytic and quasi-analytic solutions for wind-driven compact HII regions

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L. Zaninetti

209-222

New Analytic Results for Poissonian and non-Poissonian Statistics of Cosmic Voids

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A. Acker, H. M. J. Boffin, N. Outters, B. Miszalski, L. Sabin, P. Le Dû, F. Alves

223-233

Discovery of New Faint Northern Galactic Planetary Nebulae

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J. C. Rodríguez-Ramírez, A. C. Raga

235-242

The expansion of a stellar wind bubble within a non-singular, stratified core

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L. F. Rodríguez, S. A. Dzib, L. Loinard, L. A. Zapata, A. C. Raga, J. Cantó, A. Riera

243-249

Radio and Optical Observations of DG Tau B

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R. F. L. Holanda, S. H. Pereira

251-256

On the dynamics of the universe in D spatial dimensions

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C. D. Scarfe, R. F. Griffin

257-265

The Spectroscopic orbits of HD 23052 and HD 90512

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J. Bohigas

267-274

Open slit echelle spectroscopy of planetary nebula M 1-9

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J. P. Torres-Papaqui, R. Coziol, H. Andernach, R. A. Ortega-Minakata, D. M. Neri-Larios, I. Plauchu-Frayn

275-291

Evidence of Supermassive Black Holes in Narrow Emission Line Galaxies

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X. F. Deng, B. Yang, C. H. Luo, X. X. Qian, Y. P. Ding

293-298

The environmental dependence of the fraction of `unconventional' galaxies: luminous late-types and faint early-types

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J. H. Peña, R. Figuera Jaimes, M. Chow, R. Peña Miller, M. Álvarez

299-303

Strömgren uvby-beta photoelectric photometry of the variable stars RU Psc, SS Psc and TU UMa

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Research articles