Globular cluster isochrones in the infrared

Details Globular cluster isochrones in the infrared Globular cluster isochrones in the infrared

Aug 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mnras.257..423b&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 257, no. 3, Aug. 1, 1992, p. 423-432.

Astronomy and Astrophysics

Astronomy

21

Globular Clusters, Hertzsprung-Russell Diagram, Infrared Stars, Stellar Evolution, Color-Magnitude Diagram, Metallicity, Stellar Color

Scientific paper

Synthetic infrared colors have been used to transform globular cluster isochrones to the (MK, V-K), (MV, V-K) and (MK, J-K) planes. A comparison with an observed (MV, V-K) color-magnitude diagram for 47 Tuc indicates an age consistent with that of 13.5 Gyr found from the (MV, B-V) diagram. The relative positions of the giant branches in the (MK, J-K) and (MV, V-K) planes at MK = -5.5 have been tested as a function of metal abundance by comparison with empirical calibrations. The fit is satisfactory when allowance is made for zero-point corrections in the computed colors.

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