Unusual radio arcs discovered in the radio source G318.9 + 0.4

Details Unusual radio arcs discovered in the radio source G318.9 + 0.4 Unusual radio arcs discovered in the radio source G318.9 + 0.4

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990natur.347..157w&link_type=abstract

Nature (ISSN 0028-0836), vol. 347, Sept. 13, 1990, p. 157, 158.

Astronomy and Astrophysics

Astronomy

4

Radiation Distribution, Radio Sources (Astronomy), Supernova Remnants, Nebulae, Pulsars, Sky Surveys (Astronomy)

Scientific paper

Observations of the radio source G318.9 + 0.4, tentatively identified as an SNR, are reported which reveal a remarkable network of arcs in the object which exclude it from any of the standard classes of SNRs. The arcs outline an approximately elliptical region enclosing a bright off-center core component which has several curved extensions. Although the appearance of the arc is unprecedented, G318.9 + 0.4 might belong to a recently proposed class of nonthermal axisymmetric radio sources unrelated to SNRs. Alternatively, the core component may indeed be an SNR, excited by the stellar remnant of the SN event, with the arc emission arising through jet activity.

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