SIMBAD references

2003A&A...399..113P - Astronomy and Astrophysics, volume 399, 113-120 (2003/2-3)

Ruprecht 3: An old star cluster remnant?


Abstract (from CDS):

2MASS J and H photometry and integrated spectroscopy are employed to study the nature of the poorly populated compact concentration of stars Ruprecht3, which was previously catalogued as an open cluster. The integrated spectrum remarkably resembles that of a moderately metal-rich globular cluster. The distribution of the object stars in the colour-magnitude diagram is compatible with that of a 1.5±0.5Gyr open cluster or older, depending on whether the bluer stars are interpreted as turnoff stars or blue stragglers, respectively. We derive for the object a distance from the Sun d=0.72+0.04–0.03kpc and a colour excess E(B-V)=0.04. Although a globular cluster remnant cannot be ruled out, the integrated spectrum resemblance to that of a globular cluster probably reflects a stochastic effect owing to the few brighter stars. The structural and photometric properties of Ruprecht 3 are compatible with what would be expected for an intermediate-age open cluster remnant.

Abstract Copyright:

Journal keyword(s): Galaxy: open clusters and stellar associations: general - open clusters and associations: individual: Ruprecht 3 - methods: observational - techniques: spectroscopic

Nomenclature: Table 1: Cl* Ruprecht 3 PBA NN (Nos 1-23).

Errata: Ruprecht 3 PBA 9 has a Dec typo The correct position is: 6 42 07.9 -29 25 34;

CDS comments: In table1, GSC2 number of star#2 is S101331187 (not S87101331187)

Simbad objects: 30

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