A photometric study of two stellar clusterings in the Southern Milky Way /and a general consideration on previous and present data concerning galactic clusterings/

Details A photometric study of two stellar clusterings in the Southern Milky Way /and a general consideration on previous and present data concerning galactic clusterings/ A photometric study of two stellar clusterings in the Southern Milky Way /and a general consideration on previous and present data concerning galactic clusterings/

Apr 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26as...44..155l&link_type=abstract

Astronomy and Astrophysics Supplement Series, vol. 44, Apr. 1981, p. 155-158.

Astronomy and Astrophysics

Astrophysics

1

Galactic Clusters, Milky Way Galaxy, Star Clusters, Stellar Spectrophotometry, A Stars, B Stars, Early Stars, Open Clusters, Stellar Evolution, Stellar Spectra, Ubv Spectra

Scientific paper

The paper analyzes photometrically obtained data on approximately 100 stars and two suspected stellar clusterings in the Southern Milky Way, using objective-prism spectral classification methods. The observations, carried out with the 50 cm ESO telescope, achieved estimated accuracy in the photometric parameters of: V:0.023, B-V:0.011, U-B:0.022. Strong evidence for the presence of a pronounced concentration of A-F (partly evolved) stars was found. One of the stellar clusterings found (in Carina) reveals an ordinary B association with an estimated 3 million years, while the second (in Centaurus), a very loose open cluster, is of intermediate age, approximately 100 million years. Conclusively it is stated that, wherever in the Milky Way an apparent densification of stars of a certain spectral type is found, there is also an enhanced probability of detecting a physical clustering of some kind. Moreover, it may be difficult to find any line of sight through the Milky Way that does not pass through one or more star clusterings within the nearest 1-2 kpc.

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