Interaction Between Supernova Remnant G22.7-0.2 And The Ambient Molecular Clouds

Abstract

We have carried out 12CO (J=1-0 and 2-1), 13CO (J=1-0), and C18O (J=1-0) observations in the direction of the supernova remnant (SNR) G22.7-0.2. A filamentary molecular gas structure, which is likely part of a larger molecular complex with VLSR~75-79 km/s, is detected and is found to surround the southern boundary of the remnant. In particular, the high-velocity wing (77-110 km/s) in the 12CO (J=1-0 and J=2-1) emission shows convincing evidence of the interaction between SNR G22.7-0.2 and the 75-79 km/s molecular clouds (MCs). Spectra with redshifted profiles, a signature of shocked molecular gas, are seen in the southeastern boundary of the remnant. The association between the remnant and the 77 km/s MCs places the remnant at the near distance of 4.0-4.8 kpc, which agrees with a location on the Scutum-Crux arm. We suggest that SNR G22.7-0.2, SNR W41, and HII region G022.760-0.485 are at the same distance and are associated with GMC G23.0-0.4.

9 pages, 9 figures, 3 tables, accepted for publication in ApJ

References in corpus (7)

• Detection of the Characteristic Pion-Decay Signature in Supernova Remnants
• The VLA Galactic Plane Survey
• Kinematic Distances to Molecular Clouds identified in the Galactic Ring Survey
• Trigonometric Parallaxes of Massive Star Forming Regions: V. G23.01-0.41 and G23.44-0.18
• A SCUBA imaging survey of ultracompact HII regions: The environments of massive star formation
• The Distances of SNR W41 and overlapping HII regions
• Massive stars in the giant molecular cloud G23.3-0.3 and W41

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• ATOMS: ALMA Three-millimeter Observations of Massive Star-forming regions -XIII. Ongoing triggered star formation within clump-fed scenario found in the massive ($\sim 1500$ ${\mathrm{M}}_{\odot }$) clump
• Molecular Lines of 13 Galactic Infrared Bubble Regions
• The Interaction Between the Supernova Remnant W41 and the Filamentary Infrared Dark Cloud G23.33-0.30
• NuSTAR Hard X-ray Observation of the Gamma-ray Binary Candidate HESS J1832-093
• Modeling isolated magnetar spin-down evolution and implications for long-period radio transients