Is the Cygnus Loop two supernova remnants?

Abstract

The Cygnus Loop is classified as a middle-aged supernova remnant (SNR) located below the Galactic equator (l=74, b=-8.6) and 770 pc away from us. Its large size and little confusion with Galactic emission makes it an ideal test ground for evolutionary and structural theories of SNRs. New radio continuum mapping of the Cygnus Loop at 2695 MHz with the Effelsberg 100-m telescope provides indications that the Cygnus Loop consists of two separate SNRs. Combining this result with data from the literature we argue that a secondary SNR exists in the south with a recently detected neutron star close to its center. Two interacting SNRs seem to be the best explanation to account for the Cygnus Loop observations at all wavelengths.

4 pages, 2 figures, Astron. Astrophys., accepted

References in corpus (1)

• On the Nature of AX J2049.6+2939 and AX J2050.0+2914

Cited by in corpus (19)

• Fermi Large Area Telescope Observations of the Cygnus Loop Supernova Remnant
• Radio and X-ray study of two multi-shell Supernova Remnants: Kes79 and G352.7-0.1
• The Cygnus Loop's Distance, Properties, and Environment Driven Morphology
• New lambda6cm observations of the Cygnus Loop
• Radio emission from the Cygnus Loop and its spectral characteristics
• Chandra Observations of the Northeastern Rim of the Cygnus Loop
• The Plasma Structure of the Southwestern Region of the Cygnus Loop with the XMM-Newton Observatory
• The Ejecta Distributions of the Heavy Elements in the Cygnus Loop
• Line-of-sight Shell Structure of the Cygnus Loop
• Multiple accelerated particle populations in the Cygnus Loop with Fermi-LAT
• New high-frequency radio observations of the Cygnus Loop supernova remnant with the Italian radio telescopes
• New ASKAP Radio Supernova Remnants and Candidates in the Large Magellanic Cloud
• Global Far-Ultraviolet Properties of the Cygnus Loop
• The Abundance Inhomogeneity in the Northern Rim of the Cygnus Loop
• Radio and Gamma-Ray Constraints on the Emission Geometry and Birthplace of PSR J2043+2740
• New continuum and polarization observations of the Cygnus Loop with FAST II. Images and analyses
• Discovery of a Pulsar Wind Nebula Candidate in the Cygnus Loop
• Unbiased Spectroscopic Study of the Cygnus Loop with LAMOST. I. Optical Properties of Emission Lines and the Global Spectrum
• Radio polarization observations of large supernova remnants at 6cm