| |
 |
| Paper: |
Stellar Properties of Asymptotic Giant Branch Stars in the
Dwarf Irregular Galaxy IC 1613 |
| Volume: |
497, Why Galaxies Care about AGB Stars III: A Closer Look in Space and Time |
| Page: |
481 |
| Authors: |
Chun, S.-H.; Jung, M. Y.; Kang, M.; Jung, D.; Sohn, Y.-J. |
| Abstract: |
Broadband near-infrared images obtained with the WIRCam array of the
Canada-France-Hawaii Telescope are used to investigate the properties
of resolved asymptotic giant branch (AGB) stars in the dwarf irregular
galaxy IC 1613.
Combining our JHKs data with optical photometric data,
AGB stars were selected in color-magnitude diagrams covering a wide
range of wavelength.
We examined the distribution of AGB stars in the (J–Ks, H–Ks)
color-color diagram, and distinguished 140 carbon-rich and 306
oxygen-rich M giant AGB stars.
The number ratio of C stars to M giants (C/M) was estimated,
and the metallicity of IC 1613 was derived using the C/M ratio.
We also examined the local C/M ratio as a function of radial distance
from the center of the galaxy, and found a small negative gradient. |
|
|
|
|
|
