SIMBAD references

1999A&A...348..795K - Astronomy and Astrophysics, volume 348, 795-799 (1999/8-3)

Variable stars in the open cluster Mel 71.

KIM S.-L., PARK B.-G. and CHUN M.-Y.

Abstract (from CDS):

The UBVI and time-series CCD photometric observations of the intermediate-age open cluster Mel 71 were carried out to search for variable stars and obtain their physical parameters. By fitting the ZAMS to the observed color-color and color-magnitude diagrams, we estimated a reddening value of the cluster E(B-V)=0.20±0.05 and a distance modulus (V-MV)o=11.6±0.2. We also found its age of about logt=9.0 from an isochrone fitting method for Z=0.008. Using the observed time-series data, we carefully examined light variations of 358 stars, fainter than 13.0mag. Four δ Sct stars and one eclipsing binary were discovered. They are located in the δ Sct instability strip of the color-magnitude diagram. Incidence of variability within the instability strip is about 7%. Newly found δ Sct stars show complex light variations, implying that they have multiple pulsation frequencies. The period of the binary star is estimated to be about 0.678d.

Abstract Copyright:

Journal keyword(s): Galaxy: open clusters and associations: individual: Mel 71 - stars: variables: δ Sct - stars: binaries: eclipsing

Nomenclature: Table 1: Cl* Melotte 71 KPC VN (Nos V1-V5).

Simbad objects: 10

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