SIMBAD references

2010ApJ...708L..32B - Astrophys. J., 708, L32-L35 (2010/January-1)

The bottom of the white dwarf cooling sequence in the old open cluster NGC 2158.

BEDIN L.R., SALARIS M., KING I.R., PIOTTO G., ANDERSON J. and CASSISI S.

Abstract (from CDS):

We use 10 orbits of Advanced Camera for Surveys observations to reach the end of the white dwarf (WD) cooling sequence in the solar-metallicity open cluster NGC 2158. Our photometry and completeness tests show that the end falls at magnitude mF606W= 27.5±0.15, which implies an age between ∼1.8 and ∼2.0 Gyr, consistent with the age of 1.9±0.2 Gyr obtained from fits to the main-sequence turn-off. The faintest WDs show a clear turn toward bluer colors, as predicted by theoretical isochrones.

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Journal keyword(s): Hertzsprung-Russell diagram - open clusters and associations: individual: NGC 2158 - white dwarfs

Simbad objects: 3

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