Observations of nebular emission lines towards SN 1987A

Details Observations of nebular emission lines towards SN 1987A Observations of nebular emission lines towards SN 1987A

Jun 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...217...31w&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 217, no. 1-2, June 1989, p. 31-34.

Physics

Optics

45

Emission Spectra, Line Spectra, Nebulae, Supernova 1987A, Cassegrain Optics, Electron Density (Concentration), Forbidden Bands, Iue, Stellar Temperature

Scientific paper

The detection of narrow forbidden lines of O(2+) together with H-beta, H-gamma, and H-delta lines of hydrogen observed at optical wavelengths toward the nebula of SN 1987A are reported. This system of lines has a velocity of 286 km/s with respect to the sun and a velocity spread of 15 km/s (FWHM). For electron densities below about 10,000/cu cm, the temperature determined from the forbidden O III lines is 55,000 K. The forbidden O III 5007 shows an angular extent of about 2 arcsec together with a velocity gradient of about 10 km/s across the nebula.

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