A new oxygen-rich supernova remnant in the Large Magellanic Cloud

Details A new oxygen-rich supernova remnant in the Large Magellanic Cloud A new oxygen-rich supernova remnant in the Large Magellanic Cloud

Dec 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...242l..73m&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 242, Dec. 1, 1980, p. L73-L76.

Astronomy and Astrophysics

Astronomy

64

Magellanic Clouds, Optical Emission Spectroscopy, Oxygen Spectra, Radio Sources (Astronomy), Supernova Remnants, X Ray Sources, Astronomical Spectroscopy, Forbidden Transitions, Nebulae, Radio Astronomy, Radio Telescopes, Spectrometers

Scientific paper

The identification of the LMC radio/X-ray object 0540-69.3 with an optical nebulosity associated with a supernova remnant is reported. The optical component was found in a search conducted with the 3.9-m Anglo-Australian Telescope in the direct imaging mode in H beta, the forbidden O III line at 5007 A, the forbidden N II line at 6584 A and the continuum at 5323 A. An intense circular source of forbidden O III emission was discovered, along with a larger weaker arc of forbidden O III which together surround the radio source. No H beta emission was detected; however, a faint annulus coincident with the intense oxygen feature was found in forbidden N II. Spectroscopic analysis of the O III features indicates the annulus to have a velocity dispersion around 3000 km/sec, characteristic of a very young supernova remnant, while the arc is most likely background emission from the photoionized nebula.

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