The near-infrared color profile of NGC 4147

Details The near-infrared color profile of NGC 4147 The near-infrared color profile of NGC 4147

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aj....103.1259d&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 103, April 1992, p. 1259-1263.

Astronomy and Astrophysics

Astronomy

5

Globular Clusters, Near Infrared Radiation, Red Giant Stars, Stellar Color, Faint Objects, Stellar Evolution

Scientific paper

Moderately deep J and H images taken with an Hg:Cd:Te array are employed to determine the radial color profile of the cluster NGC 4147 with attention given to its observed central red cusp. The present near-IR data confirm the amplitude of the (J-H) color profile evinced in optical observations, but the results of a color-mapping technique contradict the strong radial color variation predicted in the interpretation. Because the color gradient is not detected when stochastic effects are suppressed, it is concluded that the central red cusp is related to a grouping of red giants near the cluster center.

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