Multiwavelength analysis of the X-ray spur and southeast of the Large Magellanic Cloud

Abstract

Aims: The giant HII region 30 Doradus (30 Dor) located in the eastern part of the Large Magellanic Cloud is one of the most active star-forming regions in the Local Group. Studies of HI data have revealed two large gas structures which must have collided with each other in the region around 30 Dor. In X-rays there is extended emission ($\sim 1$ kpc) south of 30 Dor called the X-ray spur, which appears to be anticorrelated with the HI gas. We study the properties of the hot interstellar medium (ISM) in the X-ray spur and investigate its origin including related interactions in the ISM. Methods: We analyzed new and archival XMM-Newton data of the X-ray spur and its surroundings to determine the properties of the hot diffuse plasma. We created detailed plasma property maps by utilizing the Voronoi tessellation algorithm. We also studied HI and CO data, as well as optical line emission data of H$\alpha$ and [SII], and compared them to the results of the X-ray spectral analysis. Results: We find evidence of two hot plasma components with temperatures of $k{T}_1\sim 0.2$ keV and $k{T}_2\sim 0.5-0.9$ keV, with the hotter component being much more pronounced near 30 Dor and the X-ray spur. In 30 Dor, the plasma has most likely been heated by massive stellar winds and supernova remnants. In the X-ray spur, we find no evidence of heating by stars. Instead, the X-ray spur must have been compressed and heated by the collision of the HI gas.

21 pages, 20 figures, published in Astronomy & Astrophysics

References in corpus (13)

• The Effects of Stellar Rotation. II. A Comprehensive Set of Starburst99 Models
• A Catalog of Galaxy Clusters Observed by XMM-Newton
• Spitzer SAGE Infrared Photometry of Massive Stars in the Large Magellanic Cloud
• Do cloud-cloud collisions trigger high-mass star formation? I. Small cloud collisions
• Molecular clouds towards RCW 49 and Westerlund 2; Evidence for cluster formation triggered by cloud-cloud collision
• A Determination of the Spin of the Black Hole Primary in LMC X-1
• The XMM-Newton EPIC Background and the production of Background Blank Sky Event Files
• Dynamical Influences of the Last Magellanic Interaction On the Magellanic Clouds
• The Magellanic Squall: Gas Replenishment from the Small to Large Magellanic Cloud
• Evolution of dust and molecular hydrogen in the Magellanic System
• Starburst99 for Windows
• LMC X-1: A New Spectral Analysis of the O-star in the binary and surrounding nebula
• Extinction and dust/gas ratio in the H I ridge region of the LMC based on the IRSF/SIRIUS near-infrared survey

Cited by in corpus (5)

• Tracking down the origin of superbubbles and supergiant shells in the Magellanic Clouds with Minkowski tensor analysis
• A new understanding of the Gemini-Monoceros X-ray enhancement from discoveries with eROSITA
• Studying the multi-phase interstellar medium in the Large Magellanic Cloud with SRG/eROSITA -- I. Analysis of diffuse X-ray emission
• Diffuse Hot Plasma in the Interstellar Medium and Galactic Outflows
• First studies of the diffuse X-ray emission in the Large Magellanic Cloud with eROSITA