An X-ray study of the supernova remnant G20.0-0.2 and its surroundings

Abstract

Aims: We study the supernova remnant G20.0-0.2 and its surroundings in order to look for the high energy counterpart of the radio nebula and to find evidence of interaction between the shock front and the interstellar medium. Methods: We used Chandra archival observations to analyze the X-ray emission from the supernova remnant. The surrounding gas was investigated using data extracted from the Galactic Ring Survey, the VLA Galactic Plane Survey, the Galactic Legacy Infrared Midplane Survey Extraordinaire, and the Bolocam Galactic Plane Survey. Results: G20.0-0.2 shows diffuse X-ray emission from the central region of the radio remnant. Although the current data do not allow us to distinguish between a thermal or non-thermal origin for the X-ray diffuse emission, based on the radio properties we suggest a synchrotron origin as the most favorable. The hard X-ray point source CXO J182807.4-113516 appears located at the geometrical center of the remnant and is a potential candidate to be the pulsar powering the nebula. We found a molecular cloud adjacent to the flattest border of G20.0-0.2, indicating a probable interaction between the shock front of the remnant and the molecular gas. Several young stellar object candidates are found located in the brightest region of the molecular emission, and over a millimeter continuum source and a dark cloud. This distribution is an indication of an active star forming region around the supernova remnant.

13 pages, 10 figures, accepted for publication in A&A. Figures degraded to reduce file size

References in corpus (9)

• The Boston University-Five College Radio Astronomy Observatory Galactic Ring Survey
• The VLA Galactic Plane Survey
• Kinematic Distances to Molecular Clouds identified in the Galactic Ring Survey
• The Molecular Properties of Galactic HII Regions
• Massive-Star Forming Infrared Loop around the Crab-like Supernova Remnant G54.1+0.3: Post Main-Sequence Triggered Star Formation?
• High resolution radio study of the Pulsar Wind Nebula within the Supernova Remnant G0.9+0.1
• The Radio Emission, X-ray Emission, and Hydrodynamics of G328.4+0.2: A Comprehensive Analysis of a Luminous Pulsar Wind Nebula, its Neutron Star, and the Progenitor Supernova Explosion
• The molecular clump towards the eastern border of SNR G18.8+0.3
• Imaging of Four Galactic Supernovae Remnants in the Mid-Infrared, and their Interaction with the Interstellar Medium

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• Revised Distances to 21 Supernova Remnants
• Distances of Galactic Supernova Remnants Using Red Clump Stars
• A Catalogue of Galactic Supernova Remnants in the far-infrared: revealing ejecta dust in pulsar wind nebulae
• Trigonometric Parallaxes of Four Star-forming Regions in the Distant Inner Galaxy
• A hadronic scenario for HESS J1818-154
• Atlas of CO-Line Shells and Cavities around Galactic Supernova Remnants with FUGIN
• High energy gamma-ray detection of supernova remnants in the Large Magellanic Cloud
• Radio and infrared study of the supernova remnant candidate HESS J1912+101