SIMBAD references

2018MNRAS.475.4279C - Mon. Not. R. Astron. Soc., 475, 4279-4297 (2018/April-3)

Photometric metallicity map of the Small Magellanic Cloud.

CHOUDHURY S., SUBRAMANIAM A., COLE A.A. and SOHN Y.-J.

Abstract (from CDS):

We have created an estimated metallicity map of the Small Magellanic Cloud (SMC) using the Magellanic Cloud Photometric Survey (MCPS) and Optical Gravitational Lensing Experiment (OGLE III) photometric data. This is a first of its kind map of metallicity up to a radius of ∼2.5°. We identify the Red Giant Branch (RGB) in the V, (V - I) colour-magnitude diagrams of small sub-regions of varying sizes in both data sets. We use the slope of the RGB as an indicator of the average metallicity of a sub-region and calibrate the RGB slope to metallicity using available spectroscopic data for selected sub-regions. The average metallicity of the SMC is found to be [Fe/H] = -0.94 dex (σ[Fe/H] = 0.09) from OGLE III and [Fe/H] = -0.95 dex (σ[Fe/H] = 0.08) from MCPS. We confirm a shallow but significant metallicity gradient within the inner SMC up to a radius of 2.5° (-0.045 ± 0.004 to -0.067 ± 0.006 dex deg–1).

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: abundances - Hertzsprung-Russell and colour-magnitude diagrams - galaxies: abundances - Local Group - Magellanic Clouds

Simbad objects: 7

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2019.09.20-06:17:03

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