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The Stellar Association LH 99

Published online by Cambridge University Press:  03 August 2017

M.C. Lortet ,
G. Testor  and
H. Schild
M.C. Lortet
Affiliation:
D.A.E.C. Observatoire de Meudon F-92195 Meudon Cedex France
G. Testor
Affiliation:
D.A.E.C. Observatoire de Meudon F-92195 Meudon Cedex France
H. Schild
Affiliation:
University College London Department of Physics and Astronomy United Kingdom

Extract

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The stellar content of this stellar association, related to the supernova remnant N 157B = SNR 0538-691, was up to now unknown, except for three Wolf-Rayet stars and a few red supergiant candidates. A thorough study based on UBV photometry, spectra of 95 stars and nebular spectra will be described elsewhere (see also Schild et al. in these Proceedings).The outstanding properties of this region are :

A. the presence of a shell-shaped supernova, which dominates the thermal radio continuum. It is relatively faint in [OUI], strong in [Sil], [Fe 4658] and He II 4686. The expansion velocity reported by Chu and Kennicutt (1988) is 180 km/s. In addition, many extensions and filaments are found all over a wide area, and possibly there has been more than one supernova responsible.

Type
Session VIII. Inventory and Distribution
Information
Symposium - International Astronomical Union , Volume 143: Wolf–Rayet Stars and Interrelations with other Massive Stars in Galaxies , 1991 , pp. 644
Copyright
Copyright © Kluwer 1991 

References

REFERENCES

- Morgan, D.H., Good, A.R., 1987, M.N.R.A.S. 224, 435 CrossRefGoogle Scholar
- Testor, G., Schild, H., 1990, Astron. Astrophys., in press Google Scholar