Loading...
Exploring the Gaseous Eruption in the 30-Doradus Starburst Region
Citations
Altmetric:
Soloist
Composer
Publisher
AAS
Date
2024
Additional date(s)
Abstract
The Large Magellanic Cloud (LMC) exhibits significant galactic winds, particularly in the vicinity of the 30-Doradus starburst region, expelling vast amounts of gas into the surrounding circumgalactic medium (CGM). In this study, we investigate the kinematics, ionization, and gas distribution of the outflows on the near side of the LMC along 8 down-the-barrel sightlines within a projected radius of approximately 1.5 degrees from the 30-Doradus. Utilizing Hubble Space Telescope’s (HST) UV absorption-line data from the Ultraviolet Legacy Library of Young Stars as Essential Standards (ULLYSES) survey, along with 21-cm radio emissions data from Galactic Australian Square Kilometre Array Pathfinder (GASKAP) survey, we define the boundaries of the LMC’s disk. Additionally, we employ radio data from Parkes Galactic All-sky (GASS) Survey to estimate the H I column densities of the winds. Our Voigt profile fits to the UV absorption-line data reveal the presence of low-ion absorptions ranging from velocities as low as VLSR ~100 km/s to the disk boundary. Notably, we observe a direct association between gas in the velocity range 150 < VLSR (km/s) < (Disk Boundary) and the 30-Doradus region, as evidenced by the declining nature of column densities with increasing distance from the center. Our findings uncover predominantly ionized winds characterized by a multi-phase gas composition. Furthermore, observed ion ratios and photoionization modeling utilizing Cloudy indicate that up to 30% of refractory elements (Si, Fe) exist in the dust phase.
Contents
Subject(s)
Files
Loading...
Poudel.pdf
Adobe PDF, 51.55 KB
Research Projects
Organizational Units
Journal Issue
Genre
Description
Format
Department
Physics and Astronomy