Vol. 15 No. 1 (1987)

I. N. Azcárate, J. C. Cersosimo, F. R. Colomb

3-10

H166α emission from low-density gas associated with southern H IIregions.

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M. L. Franco, W. G. L. Poppel, E. R. Vieira

11

A SOUTHERN ATLAS OF GALACTIC HYDROGEN (THE REGION 0 degrees \< Q \< 12 degrees, -3 degrees >/ B -17 degrees)

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D. Ballereau, M. Alvarez, J. Chauville, R. Michel

29-52

Hα echelle spectroscopy of Be stars: an atlas.

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A. L. Gyulbudaghian, A. L. Gyul'Budagyan, L. F. Rodríguez, E. Mendoza-Torres

53-57

Three new H₂O masers located near Herbig-Haro-like nebulosities.

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P. López de Coca, A. Rolland, R. Garrido, E. Rodríguez

59-62

Radial modes excited in the Delta Scuti star 44 Tau.

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Rosa Ma. Ros

65-72

Superposición de sistemas estelares. II.

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C. Meirelles Filho

73-84

A corona plus disc model for Cygnus X-1.

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P. Monderen, P. S. The

85-88

The nature of a nebulous stellar object in Centaurus.

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J. A. de Freitas Pacheco, J. G. Veliz

89-93

Physical characteristics of two low-excitation planetary nebulae: He2-277 and He 1312.

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Margarita Rosado

95-101

The radial velocity field of the optical filaments within the boundaries of CTB 80.

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T. Gallardo, G. Tancredi

103-105

Lightcurve and rotation period of 40 Harmonia.

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G. Haro, E. Chavira

107-116

On the nature of the PHL objects. Identification charts of PHL objects in a field of approximately 40 square degrees centered at 0^h53^m and -11°.5 (1950).

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M. Peimbert, S. Torres-Peimbert

117-123

Collisional excitation of the λ10830 He I line and the populationof the 2³S He I state in gaseous nebulae.

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I. N. Azcarate, J. C. Cersosimo, F. R. Colomb

125-132

Low density envelopes of southern H II regions.

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Research articles