Speaker
Description
This research project aims to compare the mass function of giant molecular clouds (GMCs) with the luminosity function of the H II region to better understand the relationship between the mass distribution of GMC and the luminosity distribution of the H II region. We use the PHANGS-MUSE instrument to obtain luminosity data for the H II region and the PHANGS-ALMA instrument to obtain mass data for the GMCs, and use Python for fitting analysis to determine the slope of their distributions and make comparisons.
Our goal is to analyze whether the mass distribution of GMCs directly affects the luminosity distribution of the H II region, thus providing valuable insights into the formation process of these clouds. Furthermore, we will investigate the star formation efficiency (SFE) within GMCs and how they evolve into stellar cradles, thereby influencing the surrounding interstellar medium.
This study found that within NGC0628 and NGC3627 radius range of 4-6 to over 6 kpc, the slopes of the GMC mass function are highly consistent with the slope trend of the luminosity function, indicating that star formation is stable and inherits the mass of the parent cloud. However, in radius range of 2-4 to 4-6 kpc, the slopes of the two functions show opposite trends. This slope decoupling highlights the evolutionary transition between gas and stars: Massive molecular clouds are exhausted due to star formation (slope becomes steeper), while the H II region reaches peak luminosity (slope becomes flatter). Furthermore, the slope trend in radius range of 0-2 kpc of NGC 0628 further reveals the role of the local environment in large-scale reproduction.
| Participate the oral/poster presentation award competition | Yes |
|---|