Astronomy and Astrophysics – Astronomy
Scientific paper
May 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988mnras.232..381m&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 232, May 15, 1988, p. 381-406. Research supported by th
Astronomy and Astrophysics
Astronomy
25
Galactic Clusters, Galactic Radiation, H Alpha Line, Astronomical Photometry, Forbidden Bands, Spectral Line Width, Spectrophotometry
Scientific paper
The Burrell Schmidt telescope has been used to survey H-alpha emission in 69 galaxies in the Abel 347 and Abell 1367 clusters. The survey has recovered 60-80 percent of the potentially detectable IRAS galaxies. An approximate flux threshold of about 10 to the -13th erg/sq cm per s and an equivalent width threshold of about 20 A have been found. Global H-alpha + forbidden N II line equivalent widths and fluxes were found to be in good agreement with values obtained for a small subset of galaxies measured using wide aperture photoelectric photometry. It is noted that an approximate redshift estimate may be made with 1sigma accuracy of about 550 km/s by measuring the position of the H-alpha emission feature relative to the peak of the continuum spectrum.
Irwin Mary Jane
Moss Calvin
Whittle Mark
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