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New Stellar Associations in M31

Published online by Cambridge University Press:  04 August 2017

Yu. N. Efremov ,
G. R. Ivanov  and
N. S. Nikolov
Yu. N. Efremov
Affiliation:
STERNBERG INSTITUTE, MOSCOW
G. R. Ivanov
Affiliation:
DEPARTMENT OF ASTRONOMY, UNIVERSITY OF SOFIA, SOFIA, BULGARIA
N. S. Nikolov
Affiliation:
DEPARTMENT OF ASTRONOMY, UNIVERSITY OF SOFIA, SOFIA, BULGARIA

Extract

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About twenty years ago van den Bergh (1964) recognized 188 OB associations in the Andromeda Nebula. He used plates taken by the 52-inches Tautenburgh Schmidt telescope in GDR. Later on Richter (1971) added 7 new associations in the south-western periphery of M31. Now we have the opportunity to continue the search of stellar associations in M31 with the 2m Ritchey-Chrétien (RC) telescope of the Bulgarian National Astronomical Observatory. The limiting magnitude of this telescope is approximately the same as that of the Tautenburg 2m Schmidt telescope but it possesses somewhat smaller field (1°x1°) with plate-scale 12.8 mm−1. That is why a new search of stellar associations in M31 by means of the 2m RC telescope is very efficient. Indeed, some previous inspections of the RC plates (Efremov, 1982) indicated some new associations in M31.

Type
Poster Papers 3
Information
Symposium - International Astronomical Union , Volume 116: Luminous Stars and Associations in Galaxies , 1986 , pp. 389 - 390
Copyright
Copyright © Reidel 1986 

References

Bergh, S. van den, 1964, Astroph. J. Suppl., 9, 65.CrossRefGoogle Scholar
Efremov, Yu. N., 1982, Pisma v Astron. Zh., 8, 585.Google Scholar
Ivanov, G. R., 1985, Astrophysics and Space Sci., (in press).Google Scholar
Richter, G. A., 1971, Astron. Nachr., 292, 275.Google Scholar