Propagation of star formation at sub-kiloparsec scales
arXiv:1907.02934 · doi:10.1093/mnras/stz1881
Abstract
We study the propagation of star formation based on the investigation of the separation of young star clusters from HII regions nearest to them. The relation between the separation and U-B colour index (or age) of a star cluster was found. The average age of star clusters increases with the separation as the 1.0-1.2 power in the separation range from 40 to 200 pc and as the 0.4-0.9 power in the range of 100-500 pc in the galaxies with symmetric morphology. The galaxies with distorted asymmetric disc structure show more complex and steeper (power >1.2 at separations from 40 to 500 pc) dependence between the age and the separation. Our results confirm the findings of previous studies on the dominant role of turbulence in propagation of the star formation process on spatial scales up to 500 pc and on time scales up to 300 Myr. On a smaller scale (=<100 pc), other physical processes, such as stellar winds and supernova explosions, play an important role along with turbulence. On the scale of stellar associations (100-200 pc and smaller), the velocity of star formation propagation is almost constant and it has a typical value of a few km/s.
arXiv comment10 pages, 13 figures, 2 tables. Accepted for publication in MNRAS
References in corpus (24)
- Embedded Clusters in Molecular Clouds
- Evolution of asymptotic giant branch stars II. Optical to far-infrared isochrones with improved TP-AGB models
- The Spitzer Local Volume Legacy: Survey Description and Infrared Photometry
- An H-alpha Imaging Survey of Galaxies in the Local 11 Mpc Volume
- Dawes Review 4: Spiral Structures in Disc Galaxies
- Hierarchical Star Formation from the Time-Space Distribution of Star Clusters in the Large Magellanic Cloud
- The H alpha Galaxy Survey I. The galaxy sample, H alpha narrow-band observations and star formation parameters for 334 galaxies
- The Antennae Galaxies (NGC 4038/4039) Revisited: ACS and NICMOS Observations of a Prototypical Merger
- A Fractal Origin for the Mass Spectrum of Interstellar Clouds: II. Cloud Models and Power Law Slopes
- Using H-alpha Morphology and Surface Brightness Fluctuations to Age-Date Star Clusters in M83
- The Spatial Relation between Young Star Clusters and Molecular Clouds in M 51 with LEGUS
- Structure and star formation in disk galaxies II. Optical imaging
- The Spatial Distribution of the Young Stellar Clusters in the Star Forming Galaxy NGC 628
- Hierarchical Star Formation in Nearby LEGUS Galaxies
- Hierarchical star formation in the Milky Way disk
- Connecting Clump Sizes in Turbulent Disk Galaxies to Instability Theory
- Search For Star Cluster Age Gradients Across Spiral Arms of Three LEGUS Disk Galaxies
- Hierarchical Star Formation in Turbulent Media: Evidence from Young Star Clusters
- The VMC Survey. XXIX. Turbulence-Controlled Hierarchical Star Formation in the Small Magellanic Cloud
- Regular chains of star formation complexes in spiral arms of NGC 628
- The evolution of luminosity, colour and the mass-to-luminosity ratio of Galactic open clusters: comparison of discrete vs. continuous IMF models
- A spectral and photometric study of 102 star forming regions in seven spiral galaxies
- Studies of the stellar populations of galaxies using two-color diagrams
- Robust Cross-correlation-based Measurement of Clump Sizes in Galaxies