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The Large Magellanic Cloud Cepheids: effects of helium content variations

Published online by Cambridge University Press:  18 February 2014

Marcella Marconi ,
Roberta Carini ,
Enzo Brocato  and
Gabriella Raimondo
Marcella Marconi
Affiliation:
INAF - Osservatorio Astronomico di Capodimonte, Via Moiariello 16, 80131 Napoli, Italy email: marcella.marconi@oacn.inaf.it
Roberta Carini
Affiliation:
INAF - Osservatorio Astronomico di Roma, via Frascati 33, 00040 Monte Porzio Catone, Italy email: carini@oa-roma.inaf.it, brocato@oa-roma.inaf.it
Enzo Brocato
Affiliation:
INAF - Osservatorio Astronomico di Roma, via Frascati 33, 00040 Monte Porzio Catone, Italy email: carini@oa-roma.inaf.it, brocato@oa-roma.inaf.it
Gabriella Raimondo
Affiliation:
INAF - Osservatorio Astronomico di Teramo, Mentore Maggini s.n.c., 64100 Teramo, Italy email: raimondo@oa-teramo.inaf.it
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Abstract

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An extended set of evolutionary and pulsational models has been computed for two chemical compositions representative of classical Cepheids in the Large Magellanic Cloud. The comparison between the standard and He enhanced theoretical predictions is analysed and the implications for interpreting current observations and for defining the Cepheid based distance scale are discussed.

Keywords

stars: variables: Cepheidsstars: abundancesstars: distances
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S301: Precision Asteroseismology , August 2013 , pp. 451 - 452
Copyright
Copyright © International Astronomical Union 2014 

References

Bono, G., Marconi, M., & Stellingwerf, R. F. 1999, ApJS, 122, 167CrossRefGoogle Scholar
Marconi, M., Musella, I., & Fiorentino, G. 2005, ApJ, 632, 590CrossRefGoogle Scholar