UVIT Imaging of WLM: Demographics of Star-forming Regions in the Nearby Dwarf Irregular Galaxy

We present a study of star-forming regions and their demographics in the nearby dwarf irregular galaxy WLM using Ultraviolet Imaging Telescope (UVIT) multiband observations in three filters, F148W, N245M, and N263M. We find that the UV emission is extended at least up to 1.7 kpc, with the NUV emissi...

Full description

Saved in:
Bibliographic Details
Published in:The Astronomical journal 2018-09, Vol.156 (3), p.109
Main Authors: Mondal, Chayan, Subramaniam, Annapurni, George, Koshy
Format: Article
Language:English
Subjects:
Astronomical models
Astronomy
Cloud formation
Dwarf galaxies
Emission
Galaxies
galaxies: dwarf
galaxies: individual
galaxies: star formation
Gamma rays
H alpha line
Hot stars
Irregular galaxies
Local Group
Morphology
Star & galaxy formation
Star formation
Star formation rate
Structural hierarchy
Temperature
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We present a study of star-forming regions and their demographics in the nearby dwarf irregular galaxy WLM using Ultraviolet Imaging Telescope (UVIT) multiband observations in three filters, F148W, N245M, and N263M. We find that the UV emission is extended at least up to 1.7 kpc, with the NUV emission more extended than the FUV. We create UV color maps ((F148W − N245M) and (F148W − N263M)) to study the temperature morphology of young stellar complexes with the help of theoretical models. We identify several complexes with temperature T > 17,500 K, which are likely to be OB associations present in the galaxy. These complexes show good spatial correlation with the H -emitting regions, H i distribution, and HST-detected hot stars. The hot star-forming regions are found to be clumpy in nature and show a hierarchical structure, with sizes in the range of 4-50 pc, with a large number with sizes
ISSN:0004-6256
1538-3881
DOI:10.3847/1538-3881/aad4f6