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Title:
Spectrophotometry of the optical emission from RCW103 and Milne 23
Authors:
Ruiz, M. T.
Publication:
Astronomical Journal (ISSN 0004-6256), vol. 88, Aug. 1983, p. 1210-1221. Research supported by the Universidad de Chile. (AJ Homepage)
Publication Date:
08/1983
Category:
Astronomy
Origin:
STI
NASA/STI Keywords:
STELLAR SPECTROPHOTOMETRY, SUPERNOVA REMNANTS, H LINES, NITROGEN, OPTICAL EMISSION SPECTROSCOPY, VIDICONS
DOI:
10.1086/113411
Bibliographic Code:
1983AJ.....88.1210R

Abstract

Vidicon tube spectrograms have been obtained for five different filaments in RCW 103 and three filaments in Milne 23, and the region between 3700 and 7400 A was covered with overlapping spectra. The H-alpha/H-beta ratio of RCW 103 indicates visual absorption variations of up to 1.5 mag for different filaments, and the 4.4 mag minimum value found implies a distance of 6.5 kpc from the sun and a galactocentric distance of 4 kpc. A temperature of about 100,000 K and 10-100/cu cm density are obtained through observed line ratio comparisons with models. The Milne 23 filaments' observed H-alpha/H-beta ratios imply a visual absorption of about 0.5 mag, with densities of 5/cu cm and temperatures over 250,000 K being suggested by line ratios.

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