We present new measurements of lithium abundance and chromospheric activity in the NGC2516 open cluster using FLAMES-VLT archive data. These supplement existing data and provide new information on the spread of lithium abundance and the chromospheric activity index R′HK at approximately the Pleiades age. Comparison with theoretical models and with other observational data for the lithium abundances of NGC2516 shows that the hotter stars in our sample have a higher lithium depletion than average. Finally, the chromospheric activity index R′HK, compared to other know cluster data, seems to give a lower chromospheric age than the one provided from lithium abundance. © Springer-Verlag Berlin Heidelberg 2012.
Chromospheric activity and lithium abundance in NGC2516
Messina A. E.Primo
Formal Analysis
;Lanzafame A. C.
Secondo
Conceptualization
;
2012-01-01
Abstract
We present new measurements of lithium abundance and chromospheric activity in the NGC2516 open cluster using FLAMES-VLT archive data. These supplement existing data and provide new information on the spread of lithium abundance and the chromospheric activity index R′HK at approximately the Pleiades age. Comparison with theoretical models and with other observational data for the lithium abundances of NGC2516 shows that the hotter stars in our sample have a higher lithium depletion than average. Finally, the chromospheric activity index R′HK, compared to other know cluster data, seems to give a lower chromospheric age than the one provided from lithium abundance. © Springer-Verlag Berlin Heidelberg 2012.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
