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- W2996241351 abstract "We present new results on line-strength gradients in a sample of 18 brightest cluster galaxies (13 in clusters with cooling flows and 5 in clusters without). Here we focus on the study of the Mg2 index and the 4000A break. We find that line-strength gradients vary markedly from galaxy to galaxy, depending both on the mass deposition rate and the presence or not of emission lines in the nuclear regions. Gradients are found to be flat, and even positive (i.e. bluer when going inwards), in the emission-line region of the cooling flow galaxies with emission lines. However, outside the region where emission lines are present, mean spectral gradients of brightest cluster galaxies, in clusters with and without cooling flows, are consistent with those observed in giant elliptical galaxies. In addition, and in agreement with previous studies, we confirm a correlation between central spectral indices and the mass deposition rates, although we find that cooling flow galaxies without emission lines do not follow this trend." @default.
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- W2996241351 title "Line-Strength Gradients in Cooling Flow Galaxies" @default.
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