Mira variables in NGC 6749 field (Rosino+, 1997)

Details Mira variables in NGC 6749 field (Rosino+, 1997) Mira variables in NGC 6749 field (Rosino+, 1997)

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002ycat..72890745r&link_type=abstract

VizieR On-line Data Catalog: J/MNRAS/289/745. Originally published in: 1997MNRAS.289..745R

Physics

Clusters: Globular, Stars: Variable, Magnitudes

Scientific paper

We present V, I photometry of the loose star cluster NGC 6749, and for the first time colour-magnitude diagrams are provided. We confirm that it is a globular cluster and its blue horizontal branch indicates that it is metal-poor. We derive a reddening of E(B-V)=1.39+/-0.04 and a distance from the Sun d&sun;=7.3+/-0.9kpc (assuming a total-to-selective absorption R=3.4). The cluster is projected very close to the Galactic plane, and the derived distance implies a Galactic coordinate Z~-300pc. It is thus a halo globular cluster located close to the disc plane. We also discuss the properties of 78 newly discovered long-period variable stars, of which 75 are Miras, projected within 1° of the cluster centre. The variables do not appear to be associated with the globular cluster. From their periods, most of them belong to the metal-rich disc or bulge stellar populations.
(1 data file).

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