Abundance ratios in the hot ISM of elliptical galaxies

作者：Pipino A^*; Matteucci F

来源：Astronomy & Astrophysics, 2011, 530: A98.

DOI：10.1051/0004-6361/201016191

• ISM: abundances
• galaxies: abundances
• galaxies: elliptical and lenticular, CD
• X-rays: ISM
• galaxies: evolution

Aims. We constrain possible explanations of the theoretical Fe discrepancy in the hot interstellar medium of elliptical galaxies and simultaneously explain the [alpha/Fe] ratios.
Methods. We use the latest theoretical nucleosynthetic yields, incorporate dust, and explore different SNIa progenitor scenarios by means of a self-consistent chemical evolution model that reproduces the stellar populations properties of elliptical galaxies.
Results. Models with Fe-only dust and/or a lower effective SNIa rate achieve a closer agreement with the observed Fe abundance. However, a suitable modification of the SNIa yields relative to the standard W7 model is needed to fully describe the abundance ratio pattern. The 2D explosion model C-DDT by Maeda and collaborator may be capable of reproducing the [Fe/H] and the [alpha/Fe] ratios.

• 出版日期2011-6