Towards an Understanding of the 4000Å Break Behaviour in Old Stellar Populations

Author: Gorgas J.   Cardiel N.   Pedraz S.  

Publisher: Springer Publishing Company

ISSN: 0004-640X

Source: Astrophysics and Space Science, Vol.263, Iss.1-4, 1998-01, pp. : 167-170

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

Previous Menu Next

Abstract

We present new empirical fitting functions describing the behaviour of the discontinuity at 4000 Å in terms of the stellar atmospheric parameters: effective temperature, metallicity and surface gravity. These calibrations can be easily incorporated into stellar population models, providing, for the first time, accurate predictions of the break amplitud for, relatively old, composite systems.

Related content