NGC 5236's stars as tracers of arms and arm widths in spiral galaxies

Abstract

Generally, identifying the spiral arms of a spiral galaxy is not a hard task. However, defining the main characteristics, width and length of those structure is not a common task. Previous studies have used different tracers: Star clusters, Massers, H$\alpha$. It was until recently that individual stars were used as tracers of spiral structures. The basic method of measuring the width of spiral arms assumes a Gaussian distribution around the mean concentration, either of gas or other tracer. In this work we use NGC 5236's stars as tracers. We estimated the surface stellar density of arms and inter-arm regions to measure the width of the arms. As a test case, this works focused on NGC 5236 (M83). We find that field stellar populations can trace the (two) main spiral arms of NGC 5236. We find a correlation between the arm width and the galactocentric radii, found using other tracers. The slope of the growth of the width of the arm correlates with the morphological types of spiral galaxies. A second finding of our study suggest the possible correlation between the width of the arms and the corrotation radius, result that will be presented in a follow up paper.

arXiv comment5 pages, 4 figures. Accepted in MNRAS letter

References in corpus (18)

• Evolution of asymptotic giant branch stars II. Optical to far-infrared isochrones with improved TP-AGB models
• Trigonometric Parallaxes of High Mass Star Forming Regions: the Structure and Kinematics of the Milky Way
• HyperLEDA. III. The catalogue of extragalactic distances
• Trigonometric Parallaxes Of High-Mass Star Forming Regions: Our View Of The Milky Way
• Dawes Review 4: Spiral Structures in Disc Galaxies
• The Cepheid Distance to NGC 5236 (M 83) with the VLT
• Probing the role of the galactic environment in the formation of stellar clusters; using M83 as a test bench
• Galactic spiral structure revealed by Gaia EDR3
• The Galactic warp revealed by Gaia DR2 kinematics
• Sizes and Shapes of Young Star Cluster Light Profiles in M83
• Search For Star Cluster Age Gradients Across Spiral Arms of Three LEGUS Disk Galaxies
• The Age Distribution of Clusters in M83
• Characteristics of Spiral Arms in Late-type Galaxies
• A multi-wavelength study of spiral structure in galaxies. I. General characteristics in the optical
• The relation between magnetic and material arms in models for spiral galaxies
• The relation between surface star formation rate density and spiral arms in NGC 5236 (M83)
• Investigation of the parameters of spiral pattern in galaxies: the arm width
• Star formation in disk galaxies and its relation with spiral structure in numerical simulations