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Date and Time of the Query: 2019-06-19 T05:11:01 PDT
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For refcode 2005A&A...434..657B:
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Copyright by European Southern Observatory (ESO). Reproduced by permission
2005A&A...434..657B The calibration of the metallicity versus C/M relation P. Battinelli and S. Demers Received 29 October 2004 / Accepted 21 December 2004 This paper presents a critical reassessment of the C/M ratio in the Local Group galaxies that have been surveyed by us in the last few years. We update distances, reddenings and metallicitieswith particular care to obtain coherent values for each galaxy. A new equation for the bolometriccorrection of M stars in terms of their (R-I) coloursis obtained from Bessell et al. (1998) data. We present a critical discussion on thecolour - spectral type relation for M stars which reveals a dramatic lack ofreliable data for late M stars. Finally, we show that - when homogeneous data are used - the log(C/M0+) is well correlated to the [Fe/H] of the parent galaxy. Keywords: stars: AGB and post-AGB, stars: carbon, stars: late-type, galaxies: abundances, Local Group
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