A new look at the 'jet' in the CTB 37A/B supernova remnant complex

Details A new look at the 'jet' in the CTB 37A/B supernova remnant complex A new look at the 'jet' in the CTB 37A/B supernova remnant complex

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...374..212k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 374, June 10, 1991, p. 212-217.

Astronomy and Astrophysics

Astronomy

24

Radio Astronomy, Radio Jets (Astronomy), Supernova Remnants, Astronomical Spectroscopy, Interstellar Matter, Very Large Array (Vla)

Scientific paper

Very Large Array observations of the unusual southern Galactic supernova remnant (SNR) complex near l = 348 deg, b = 0 deg at wavelengths of 6, 20, and 90 cm are presented. Derived continuum spectra and observed morphologies indicate that G348.5 + 0.1 (CTB 37A) does not have a 'jet' as reported by previous observers but is instead superposed on a second, previously unidentified SNR lying along the line of sight. This new SNR is designated G348.5 - 0.0 according to the usual convention. Other observers have also noted a faint, flat spectrum bridge of emission possibly connecting the G348.5 + 0.1/G348.5 - 0.0 superposition with a third nearby remnant G348.7 + 0.3 (CTB 37B). However, a connection appears unlikely, and it is suggested that the 'bridge' merely consists of faint emission which has 'leaked' from the southeastern side of G348.7 + 0.3 and has no relation to the G348.5 + 0.1/G348.5 - 0.0 superposition. These new data also reveal a remarkable region of 'blown-out' emission from the southwestern part of G348.5 + 0.1 which most likely reflects the presence of large-scale density inhomogeneities in the interstellar medium into which the SNR shell is expanding.

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