Abstract
The effect of rotation on the observed colours of stars has been considered as a possible cause for the blue straggler phenomenon in clusters listed by Mermilliod (1982). It appears that this phenomenon is definitely not real in the case of the late B and early A spectral type blue stragglers that are intrinsic slow rotators. Among clusters containing the early B type blue stragglers it is found that the anomalous position of the stragglers in NGC 6633, NGC 6475 and NGC 2516 cannot be accounted for by rotation effects alone.
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on leave from Assumption College, Changanacherry, Kerala.
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D’Souza, J., Mathew, A. & Rajamohan, R. Effects of rotation on the colours and line indices of stars 6. The reality of the blue straggler phenomenon. J Astrophys Astron 13, 109–128 (1992). https://doi.org/10.1007/BF02702245
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DOI: https://doi.org/10.1007/BF02702245