CN and CH bands in Exoplanet Host Stars

SAFFE, CARLOS; JOFRÉ, EMILIANO; PETRUCCI, ROMINA

Boletín de la Asociación Argentina de Astronomía

Asociación Argentina de Astronomía

Lugar: La Plata; Año: 2012 vol. 54 p. 49 - 52

1669-9521

We measured the strength of CN and CH molecular bands in a sample of stars with and without exoplanets (indices dS3839, dS4142 and dCH4300). The index dS3839 seem to present smaller values for stars without exoplanets. No correlation is found between molecular bands and exoplanet parameters, supporting the primordial hypothesis of planet formation. The CN band strength seem to increase with C, N and Fe abundances. This could explain at least in part the disimilar distributions of CN observed for stars with and without exoplanets. We caution that this is an initial result based in relatively small number of objects.