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A Possible Solution for the M/L-[Fe/H] Relation of Globular Clusters in M31. II. The Age-Metallicity Relation

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F17%3A10369263" target="_blank" >RIV/00216208:11320/17:10369263 - isvavai.cz</a>

  • Result on the web

    <a href="http://dx.doi.org/10.3847/1538-4357/aa6719" target="_blank" >http://dx.doi.org/10.3847/1538-4357/aa6719</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.3847/1538-4357/aa6719" target="_blank" >10.3847/1538-4357/aa6719</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    A Possible Solution for the M/L-[Fe/H] Relation of Globular Clusters in M31. II. The Age-Metallicity Relation

  • Original language description

    This is the second paper in a series in which we present a new solution to reconcile the prediction of single stellar population (SSP) models with the observed stellar mass-to-light (M/L) ratios of globular clusters (GCs) in M31 and their trend with respect to[Fe/H]. In the present work, our focus is on the empirical relation between age and metallicity for GCs and its effect on the M/L ratio. Assuming that there is an anti-correlation between the age of M31 GCs and their metallicity, we evolve dynamical SSP models of GCs to establish a relation between the M/L ratio (in the V and K band) and metallicity. We then demonstrate that the established M/L-[Fe/H] relation is in perfect agreement with that of M31 GCs. In our models, we consider both the canonical initial mass function (IMF) and the top-heavy IMF, depending on cluster birth density and metallicity as derived independently from Galactic GCs and ultra-compact dwarf galaxies by Marks et al. Our results signify that the combination of the density-and metallicity-dependent top-heavy IMF, the anti-correlation between age and metallicity, stellar evolution, and standard dynamical evolution yields the best possible agreement with the observed trend of M/L-[Fe/H] for M31 GCs.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10308 - Astronomy (including astrophysics,space science)

Result continuities

  • Project

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2017

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Astrophysical Journal

  • ISSN

    0004-637X

  • e-ISSN

  • Volume of the periodical

    839

  • Issue of the periodical within the volume

    1

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    6

  • Pages from-to

  • UT code for WoS article

    000403467500001

  • EID of the result in the Scopus database