Line identification and data on line intensities are provided from medium-dispersion plates secured at Bosque Alegre with the nebular spectrograph and Carnegie image tube attached to the 154-cm telescope. The results are to be published elsewhere.Asociación Argentina de Astronomí

Méndez, R.H.

Ringuelet, Adela Emilia

English

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Possible new binarles among the Wolf-Rayet stars
VlRPI N. de Monteagudo 
Observatorio Astronómico, La Plata
Abstract: Spectra of Wolf-Rayet stars HD 92740 and HD 93131, 
obtained between May 16 - May 23, 1970, at Cerro Tololo Inter- 
american Observatory, in Chile, confirm that these stars show the 
superior members of the Balmer series in absorption. The radial 
velocities of various emission Unes measured indicate variations 
of the order of 140 km/s for HD 92740 and of the order of 180 
km/s for HD 93131. These stars may be binaries with periods of 
the order of a month.
Peculiar classified Wolf-Rayet stars, HD 90657 
and HD 117688
Virpi N. de Monteagudo 
Observatorio Astronómico, Córdoba e IMAF
Abstract: Spectral observations of Wolf-Rayet stars HD 90657 and 
HD 117688 were made at the Cerro Tololo Interamerican Obser­
vatory, in Chile. These stars have been classified by earlier authors 
as intermedíate objects between the two secuences of W-R stars, 
presenting in their spectra lines of both carbón and nitrogen. 
However, our observations do not confirm this classification, the 
observed spectra look like “normal” WN stars. In addition, 
HD 90657, earlier classified as WN4—C -J- OB, shows variations 
of radial velocity of the order of 130 km/s and variations of type 
V/R in the shape of the emission Unes.
Comentarios sobre 272 +12°1, 292 +1°1, 328 —17°1
A. E. Ringuelet y R. H. Méndez 
Observatorio Astronómico, La Plata
Abstract: Comments are made on the following planetaries:
272 + 12°1: the material available permits us to pose some doubts 
as to the absence of relation between the planetary 
and the central star.
292 + Io 1: a study of this object, which presents peculiarities 
in the expansión velocity, will be published elsewhere.
328 — 17° 1: this object must be excluded from the lists of 
planetaries. It has been previously studied as a dwarf 
galaxy by M. Pastoriza (La Galaxia Peculiar IC 4662, 
Boletín de la Asoc. Argentina de Astronomía, N9 15, 
pág. 1).
Observaciones de nebulosas planetarias australes - I
R. H. Méndez y A. E. Ringuelet
Observatorio Astronómico, La Plata
Abstract: Line identifications and data on Une intensities are pro- 
vided from medium-dispersion plates secured at Bosque Alegre with 
the nebular spectrograph and Carnegie image tube attached to the 
154-cm telescope. The results are to be published elsewhere.
30 Bol. N’ 16 - Asoc. Aro. de Astr.


Observaciones de nebulosas planetarias australes – I

http://sedici.unlp.edu.ar/bitstream/handle/10915/98472/Documento_completo.pdf?sequence=1

Observaciones de nebulosas planetarias australes – I

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