The Role of the TP-AGB Phase in Color - M/L Relations

Details The Role of the TP-AGB Phase in Color - M/L Relations The Role of the TP-AGB Phase in Color - M/L Relations

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aspc..445..403p&link_type=abstract

Why Galaxies Care about AGB Stars II: Shining Examples and Common Inhabitants. Proceedings of a conference held at University Ca

Astronomy and Astrophysics

Astronomy

Scientific paper

Color-M/L (mass-to-light) relations are a popular tool to derive stellar mass in external galaxies. Stellar mass estimates often rely on near-infrared (NIR) photometry, considered an optimal tracer since it is little affected by dust and by the “frosting” effect of recent star-formation episodes. However, due to the important contribution of AGB stars to NIR luminosity, theoretical estimates of the M/L ratio in NIR bands strongly depend on the modelling of the AGB phase. We use recent isochrones, including a detailed modelling of the TP-AGB phase, to update theoretical colour-M/L relations in the optical and NIR, and discuss the consequences for the estimated stellar masses in external galaxies.

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