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

Abstract

view Abstract Citations (74) References (14) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS A new oxygen-rich supernova remnant in the Large Magellanic Cloud Mathewson, D. S. ; Dopita, M. A. ; Tuohy, I. R. ; Ford, V. L. Abstract 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. Publication: The Astrophysical Journal Pub Date: December 1980 DOI: 10.1086/183406 Bibcode: 1980ApJ...242L..73M Keywords: 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; Astronomy full text sources ADS |