The globular cluster NGC 6144 and its neighbouring region

Details The globular cluster NGC 6144 and its neighbouring region The globular cluster NGC 6144 and its neighbouring region

Mar 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26as...39..315a&link_type=abstract

Astronomy and Astrophysics Supplement Series, vol. 39, Mar. 1980, p. 315-323.

Astronomy and Astrophysics

Astrophysics

17

Globular Clusters, Stellar Spectrophotometry, Ubv Spectra, Abundance, Color-Magnitude Diagram, Hot Stars, Interstellar Extinction, Red Giant Stars, Stellar Magnitude

Scientific paper

Photometry is being reported on the non-studied globular cluster NGC 6144, as well as on its neighboring region. The object is situated in the general area behind the nebulosity in Scorpio-Ophiuchus between its counterpart M4 and the bright red giant star Antares. The color magnitude diagram (CMD) is characterized by a steep giant branch, a group of exclusively blue horizontal branch stars, and a well defined instability gap within the color range from about 0.4 to 0.8. The CMD has the typical features of metal poor clusters, similar to M3, M15 and M92. It is shown that absorption increases towards the NE direction, from the analysis of five circular areas equal to the one measured in the cluster.

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