Bibcode
Carter-Bond, Jade C.; O'Brien, David P.; Delgado Mena, Elisa; Israelian, G.; Santos, Nuno C.; González-Hernández, J. I.
Referencia bibliográfica
The Astrophysical Journal Letters, Volume 747, Issue 1, article id. L2 (2012).
Fecha de publicación:
3
2012
Número de citas
40
Número de citas referidas
32
Descripción
Simulations have shown that a diverse range of extrasolar terrestrial
planet bulk compositions are likely to exist based on the observed
variations in host star elemental abundances. Based on recent studies,
it is expected that a significant proportion of host stars may have
Mg/Si ratios below 1. Here we examine this previously neglected group of
systems. Planets simulated as forming within these systems are found to
be Mg-depleted (compared to Earth), consisting of silicate species such
as pyroxene and various feldspars. Planetary carbon abundances also vary
in accordance with the host star C/O ratio. The predicted abundances are
in keeping with observations of polluted white dwarfs, lending validity
to this approach. Further studies are required to determine the full
planetary impacts of the bulk compositions predicted here.
Proyectos relacionados
Pruebas Observacionales de los Procesos de Nucleosíntesis en el Universo
Recientemente se han llevado a cabo varios análisis espectroscópicos de estrellas con planetas. Uno de los resultados más relevantes ha sido descubrir que las estrellas con planetas son en promedio más metálicas que las estrellas del mismo tipo espectral sin planetas conocidos (Santos, Israelian & Mayor 2001, A&A, 373, 1019; 2004, A&A, 415, 1153)
Garik
Israelian